CONTENTSDescription PageIntroduction ............................................................................................................... 1Advantages ............................................................................................................... 3Description ................................................................................................................ 6Control Units ............................................................................................................. 7Accessories ............................................................................................................. 23Switch ..................................................................................................................... 36Trip Curves ............................................................................................................. 37Wiring Diagrams ..................................................................................................... 42Circuit Breaker Dimensions .................................................................................... 46Appendix ................................................................................................................. 62

MASTERPACT ® Universal PowerCircuit Breaker

Class 631

1©1995 Square D—All Rights Reserved11/98

Standard Compliance

n UL489: MP08 to MP50 circuit breakers and their accessories are Listed under UL files E63335,E103955 and E113555

n UL1066/ANSI: MC08 to MC50 circuit breakers are UL Listed according to UL1066 (ANSI C37-13)under file E161835

n International Standards: the MASTERPACT® circuit breaker has been designed to meet all themajor standards including:

o IEC 947-2 and related standards such as VDE, BS, EN, etc.o JEC, JISnUL 1008: MP12, MP20 and MP30 circuit breakers are suitable for use in transfer switch

equipmentnMarine Applications:o Homologated by Bureau Veritaso Approved by Det Norske Veritas and Germanische Lloyd'so Listed by Lloyd's Register of Shippingo American Bureau of Shipping applicationo UL marine

High Short-time Current Rating: Up to 100 kA for 1 sec.

The exceptional short-time rating of 75,000 A in a 3000 A frame and 100,000 A in a 4000 A frameand above allows the circuit breakers to be fully selective up to their interrupting ratings.

100% Rated

The circuit breakers are designed for continuous operation at 100% of their current rating.

Other Performances

The UL 489 and UL1066 (ANSI C37-13) standard performance tests assure that the circuit breakerhas sufficient characteristics to be used in normal conditions. However, the circuit breaker exceeds,without additional costs, the UL standard 1,500 operations required in endurance. The heavy-dutymechanism and the contact design provide a mechanical endurance of 10,000 operations (approx.)without maintenance (see page 64).

Tropicalization

The standard moisture and fungus protection ensure normal operation under extreme ambientconditions. MASTERPACT circuit breakers comply with T2 tropicalization (IEC Standard 68-2-30);relative humidity 95% at 113°F (45°C) and 80% at 131°F (55°C) (hot, humid climate). Salt sprayresistance as per IEC 68-2-11.

Poles

The 4-pole version is an efficient solution to ground fault problems created by incorrectly groundedstandby generators and incorrect transfer switching systems. By isolating the neutral of multiplesources coupled together, 4-pole circuit breakers prevent ground faults from returning to the sourcevia unintended paths. Where unintended paths exist, ground fault sensing can become inaccurate orcreate nuisance tripping.

Introduction

Ampere Rating (A) 3-Pole 4-Pole

800 MP-MC MP-MC

1200 MP MP

1600 MP-MC MP-MC

2000 MP-MC MP-MC

2500 MP MP

3000 MP MP

3200 MC

4000 MP-MC MP (1)

5000 MP-MC MP (1)

6300 MP (1)

(1) Not UL Listed.

11/98©1995 Square D—All Rights Reserved2

Introduction

Ratings

Type Ampere Rating (A) Sensor Ratings (A)

MP/MC08 800 250–400–600–800

MP12 1200 800–1200

MP/MC16 1600 1200–1600

MP/MC20 2000 1600–2000

MP25 2500 2000–2500

MP30 3000 2500–3000

MC32 3200 2500–3200

MP/MC40 4000 2500–3000–4000

MP/MC50 5000 4000–5000

MP63 6300 5000–6300

Interrupting Ratings

UL489/NEMA AB1Type Rating (A) 480 Vac 600 Vac Short-time

Standard Interrupting Rating

MP08 H1 800 65 kA 65 kA 50 kA

MP12 H1 1200 65 kA 65 kA 50 kA

MP16 H1 1600 65 kA 65 kA 50 kA

MP20 H1 2000 75 kA 75 kA 75 kA

MP25 H1 2500 75 kA 75 kA 75 kA

MP30 H1 3000 75 kA 75 kA 75 kA

MP40 H1 4000 100 kA 100 kA 100 kA

MP50 H1 5000 100 kA 100 kA 100 kA

MP63 H1 6300 (1) 100 kA 100 kA 100 kA

High Interrupting Rating

MP08 H2 800 100 kA 65 kA 50 kA

MP12 H2 1200 100 kA 65 kA 50 kA

MP16 H2 1600 100 kA 65 kA 50 kA

MP20 H2 2000 100 kA 75 kA 75 kA

MP25 H2 2500 100 kA 75 kA 75 kA

MP30 H2 3000 100 kA 75 kA 75 kA

MP40 H2 4000 125 kA 100 kA 100 kA

MP50 H2 5000 125 kA 100 kA 100 kA

MP63 H2 6300 (1) 150 kA 100 kA 100 kA

(1) Not UL Listed.

UL1066/ANSI C37–13/NEMA SG3Type Rating (A) 508 V 635 V Short-time

Special Interrupting Rating

MC08 N1 800 50 kA 50 kA 42 kA

MC16 N1 1600 50 kA 50 kA 50 kA

Standard Interrupting Rating

MC08 H1 800 65 kA 65 kA 50 kA

MC16 H1 1600 65 kA 65 kA 50 kA

MC20 H1 2000 65 kA 65 kA 65 kA

MC32 H1 3200 65 kA 65 kA 65 kA

MC40 H1 4000 100 kA 100 kA 100 kA

MC50 H1 5000 100 kA 100 kA 100 kA

3©1995 Square D—All Rights Reserved11/98

Advantages

0631

3006

0631

3007

0631

3003

0631

3004

0631

3005

Drawout Circuit Breaker Design

n The drawout assembly mechanism allows the circuit breaker to be racked in four positions(connected, test, disconnected and withdrawn).

n The closing and opening push buttons, the racking handle and racking mechanism are accessiblethrough the front door cutout. Therefore the circuit breaker can be disconnected without openingthe door and accessing live parts. Safety shutters can be provided as an option for protection fromlive parts when the circuit breaker is removed.

Connected Position Test Position Disconnected Position

True Two-step Stored Energy Mechanism

The closing time is less than five cycles. The circuit breaker is operated via a stored-energymechanism which can be manually or motor charged. Closing and opening operations can be initiatedeither from the local push buttons on the circuit breaker front face or by remote control.O–C–O cycle is possible without recharging.

Designed for No Maintenance...

The circuit breaker has fewer parts (by a factor of at least five) than conventional circuit breakerswhile performing the same functions. This leads to greatly enhanced reliability and reduction inmaintenance. Under normal operating conditions, according to standards and controlled by tests, thecircuit breaker does not require maintenance.

…But Exceeds Standards with an Easy and Reduced Maintenance

It is easy to remove the arc chutes and visually inspect the contacts and wear indicator. The operationcounter (spring-charging motor option) can also indicate when inspections and possible maintenanceshould be done. After operating conditions exceeding those given by standards, it is possible toextend the circuit breaker life by:n Replacement of arc chutes and spring charging motor by the user.n Replacement of main contacts by an after sale service team.Note: See pages 62–63 for additional information.

Contact Good(Circuit Breaker Closed)

Contact Worn(Circuit Breaker Closed)

11/98©1995 Square D—All Rights Reserved4

Front Connection of Secondary Circuits

All accessory terminals are located on a connecting block which is accessible from the front evenwith the circuit breaker in the test or disconnected position. This is particularly useful for fieldinspection and modification.

0631

3010

0631

3009

Advantages

Field-installable Accessories

n As the installation develops and changes, the circuit breaker can develop and change with it.Most accessories are field-installable, without losing the UL Listing mark, without any adjustmentand with only the aid of a screwdriver.

n The uniform design of the circuit breaker line allows these accessories to be common for thewhole line.

0631

3008

Opush OFF

M08 H2masterpact

connected

test

disconnected

O OPENdischarged

I

push ON circuit breaker

3 pole600V 50/60Hz

frame size 2000A

suitable for continious operation

at 100% rating in a minimum cubical

space H17.5 by W21 by D14.1/4 inches

ventilation is not required

NEMAinterrupting rating

max RMS sym amps

Volts Amps

240 100K

480 100K

600 65K

IEC 957-2 690V 50/60Hz

interrupting rating

Icu 380/440V 75KA

660V 75KA

Icu 380/440V 75KA

660V 75KA

short time rating

Icw=75KA 0.5 sec.

push to reset

I

I1 I2 I3

90%

50%

20%

STR 58 U

Ir

90

105%Ir

.88.9 .92

.95

.981.8

.85

xIo

Im tm

3

4 56

8

101.52

xIo

.3

.4 .3

.1

.1.2

on I2t off

.2

0

Ir fault

tr

Im fault

tm

I

faultIh

th

t

i

test

+ S –

– T +

T

F

Ihth

400

500 600800

1000

1200250

320

A

.3

.4 .4

.2

.1.2

on I2t off

.3

.1

I

off2

xIn

Ir :

Im :

th :

I

IG LI

G

LLG

LIG

off

reset V

tr

60

120 240

480

1530

at 1,5Ir

4

6

8 12

17

22

Ic1Ic2

.86

.9 .93.95

.98

1.8

.85

.7

.8 .85

.95

.5.6

xIr

.9

1

R

xIr

test

Io=3000A

cat. no. 54775

for masterpact

with sensors In = 6000A

E63335UND. LAB. O List.

CIRCUIT BREAKER

Doles. Issue N° LM-879200000

63 40-50 32 08-30

Single Design up to 6300 A

All frame sizes have been designed with the same technology featuring identical depth and doorcutouts, and common control units and accessories.

5©1995 Square D—All Rights Reserved11/98

Advantages

0631

3011

Disconnecting through Door

The racking handle and racking mechanism are accessible through the front door cutout.Disconnecting the circuit breaker will therefore be possible without opening the door and givingaccess to live parts.

Isolation Function by Positive Indication of Contact Status

The mechanical indicator is truly representative of the status of all three main contacts.

Segregated Compartment

Once the front cover has been removed to provide access to the auxiliary compartment, the maincontacts remain fully isolated. Furthermore, interphase partitioning allows full insulation betweeneach pole even if the front cover has been removed.

Reinforced Insulation

Two insulation barriers separate the front of the circuit breaker from main circuits.

11/98©1995 Square D—All Rights Reserved6

Description

Description

1. Arc chamber and terminal covers2. Accessories and control unit front

connecting block3. Position carriage switches4. Opening coils5. Arc chute6. Spring charging motor7. Front cover8. Control unit9. Racking crank

10. Pull-out handgrip11. Retractable rails12. Handling handgrip13. Safety shutters

0631

3012

0631

3013

Opush OFF

MERLIN GERIN

MP20H1

masterpact

connected

test

disconnected

OOPEN

discharged

I

push ON circuit breaker

3 pole600V 50/60Hz

frame size 2000A

suitable for continious operation

at 100% rating in a minimum cubical

space H17.5 by W21 by D14.1/4 inches

ventilation is not required

interrupting rating

max RMS sym amps

Volts240480600

short time rating 75KA

Amps75K75K75K

IEC 957-2 690V 50/60Hz

interrupting rating

Icu 380/440V 75KA

660V 75KA

Icu 380/440V 75KA

660V 75KA

short time rating

Icw=75KA 0.5 sec.

E63335UND. LAB. O List.

CIRCUIT BREAKER

Doles. Issue N° LM-879200000

push to reset

I

I1 I2 I3

90%

50%

20%

STR 58 U

Ir

90

105%Ir

.88.9 .92

.95

.981.8

.85

xIo

Im tm

3

4 56

8

101.52

xIo

.3

.4 .3

.1

.1.2

on I2t off

.2

0

Ir fault

tr

Im fault

tm

I

faultIh

th

t

i

test

+ S –

– T +

T

F

Ihth

400

500 600800

1000

1200250

320

A

.3

.4 .4

.2

.1.2

on I2t off

.3

.1

I

off2

xIn

Ir :

Im :

th :

I

IG LI

G

LLG

LIG

off

reset V

tr

60

120 240

480

1530

at 1,5Ir

4

6

8 12

17

22

Ic1Ic2

.86

.9 .93.95

.98

1.8

.85

.7

.8 .85

.95

.5.6

xIr

.9

1

R

xIr

test

Io=3000A

cat. no. 54775

for masterpact

with sensors In = 6000A

11 12

2

3

4

5

6

9 8 710

1

Front View

1. Charging handle2. Manual opening push button3. Manual closing push button4. Stored energy mechanism status indicator

(charged or discharged)5. Main contact position indicator (open or

closed)6. Disconnected position locking (key

interlock)7. Disconnected position padlocking8. Drawout position indicator showing that the

circuit breaker is in the connected, test ordisconnected position

9. Racking crank storage10. Door escutcheon11. Fault indicator and reset button12. Open position locking (key interlock)

13

12

11

10

9

1 2 3

4

5

6

78

7©1995 Square D—All Rights Reserved11/98

The circuit breaker can be equipped with a microprocessor-based, electronic control unit whichprovides all the traditional protection of the universal power circuit breaker (long-time, short-time,instantaneous and ground-fault) plus other built-in functions:n RMS sensing (standard)n Alarm switch (standard)n Overcurrent trip switch (standard)n Interchangeable rating plugs (on STR28DP, STR38SP and STR58UP)n Thermal memory and I2t ramp (standard on STR 38-58 control unit)n Defeatable instantaneous (standard on STR 38-58 control unit)n Zone-selective interlocking for ground-fault and short-time (option)n Current and load meter (option)n Load-monitoring outputs (option)n Fault indicators (option)n Communication ability (option)

Control Units STR 18M STR 28D STR 38S STR 58U

Basic Features

Long-time (1) Setting Adjustable Adjustable Adjustable

Delay Fixed Fixed Adjustable

Short-time Pickup Adjustable Adjustable

Delay Adjustable Adjustable

Instantaneous Adjustable Adjustable Fixed (2) Adjustable (2)

Test Receptacle Standard Standard Standard

Additional Features (Options)

Ground-fault Protection (3) n n

Built-in Ammeter n n n

Fault Indicators n n

Segregated Alarm Switch n

Zone-selective Interlocking n

Load Monitoring n

Communication Outputs n

(1) Long-time pickup at 1.1 current setting.(2) Defeatable on N1 and H1 types.(3) Two types: residual sensing (T) or residual source ground return (W).

Control Units06

3130

14

11/98©1995 Square D—All Rights Reserved8

STR 28D Control Unit for General Application

1. Mechanical pop-out type fault indicator and reset button:n Indicates that a fault trip has occurredn Prevents closing of the circuit breaker after fault until reset

2. Ammeter (LCD digital display)3. Ammeter selector used to read:n Phase currents (1, 2, 3, N)n Or the phase with the highest load current (max.)

4. Load indication (bar graph in % of current setting)5. Sensor rating6. Rating plug (on STR 28DP)7. Long-time current setting8. Instantaneous pickup9. Local and remote pre-trip alarm:n LED on at 90% of current settingn LED flashing on overload (1)n Remote indication by static contact

10. Available spaces for setting identification11. Test receptacle

0631

3016

0631

3015

Overcurrent Protection—RMS Sensing

Long-time Current Setting STR 28DP: 0.8 to 1 x Rating Plug (Pickup at 1.1 x Setting)

STR 28D: 0.4 to 1 x Current Sensor (Pickup at 1.1 x Setting)

Max. Delay Fixed: 7.5 sec. at 6 x Current Setting

Rating Plug Current Sensor Plug Rating

250 A 250–200–150–125 A

400 A 400–300–250–200 A

600 A 600–500–400–300 A

800 A 800–600–500–400 A

1200 A 1200–1000–800–600 A

1600 A 1600–1200–1000–800 A

2000 A 2000–1600–1200–1000 A

2500 A 2500–2000–1600–1200 A

3000 A 3000–2500–2000–1600 A

3200 A 3200–3000–2500–2000–1600 A

4000 A 4000–3200–3000–2500–2000 A

5000 A 5000–4000–3200–3000–2500 A

6300 A 6300–6000–5000–4000–3200–3000 A

Instantaneous Pickup 1.5 to 10 x Current Setting

Built-in Ammeter (Optional)

Option I Values Displayed Phase 1, 2, 3, Max., Neutral Current

Accuracy ±1.5 % (2)

Bar Graph Indication Phase 1, 2, 3—10% Steps

Control Power Not Required (3)

Fault or Alarm Indicators

Not Discriminated Local Pop-out Type Indicator and LED Pre-trip Alarm

Remote Overcurrent Trip and Pre-trip Alarm Switches(see pp. 14–15)

(1) According to time-current curves: between 105% and 120% of current setting.(2) Total accuracy including current sensors: ±4.5%.(3) Control power not required for loads greater than 20% of current sensor. Required for load less than 20%

of current sensors if maximum demand memory requested (see diagram on p. 43).

I

t

Long-time Setting

Instantaneous

Note: Io: Rating plugIn: Sensor ratingIr: Long-time pickuptr: Long-time delayIm: Short-time pickup

push to reset

II1 I2 I3

90%

50%

20%

STR 28 D

90

105%Ir

.88.9 .92

.95

.981.8

.85

xIo

Im

34 5

6

8101.5

2

xIr

Ir

Im

t

i

test

+ –

Ir :

Im :

1

2

43

6Ir

7

8

910

11

5

Control Units

tm: Short-time delayI: Instantaneous pickupIh: Ground-fault pickupth: Ground-fault delay

9©1995 Square D—All Rights Reserved11/98

Control Units

STR 38S Control Unit for Selective Application

1. Mechanical pop-out type fault indicator and reset button:n Indicates that a fault trip has occurredn Prevents closure of the circuit breaker after fault until reset

2. Ammeter (LCD digital display)3. Ammeter selector used to read:n Phase currents (1, 2, 3, N, ground)n Or the phase with the highest load current (max.)

4. Load indication (bar graph in % of current setting)5. Sensor rating6. Local and remote pre-trip alarm:n LED on at 90% of current settingn LED flashing on overload (1)n Remote indication by static contact

7. Rating plug (on STR 38SP)8. Long-time current setting9. Short-time pickup

10. Short-time delay11. Instantaneous ON/OFF selector12. Available space for setting identification13. Ground-fault (option T) pickup14. Ground-fault (option T) time delay15. Local (option F) fault indicators consisting of built-in light emitting

diodes; fault indicators differentiate the three causes of tripping:overload, short circuit and ground fault, if any

16. Test receptacle17. Fault indicator saving battery (option PIL)18. Fault indicator reset or battery test button19. Fault indicator reactivating button (option PIL) (2)

0631

3018

0631

3017

push to reset

II1 I2 I3

90%

50%

20%

STR 38 S

Ir90

105%Ir

.88.9 .92

.95

.981.8

.85

xIo

Im tm

34 5

6

8101.5

2

xIr

.3

.4 .3

.1.1

.2

on I2t off

.2

0

Ir fault

tr

Im fault

tm

I

faultIh

th

t

i

test

+ –

– +

T

F

test

Ih th

400

500 600800

1000

1200250

320

A

.3

.4 .4

.2.1

.2

on I2t off

.3

.1

I

offmax.xIn

Ir :

Im :

th :

1

2

4

5

6789

10

1211

13

14

1516

1719

overcurrent

ground

3

18

I

t

Ground-faultPickup

Ground-faultDelay

Long-time Setting

Short-timePickup

Short-time Delay

Instantaneous

Overcurrent Protection—RMS sensing

Long-time Current Setting STR 38SP: 0.8 to 1 x Rating Plug (Pickup at 1.1 x Setting)

STR 38S: 0.4 to 1 x Current Sensor (Pickup at 1.1 x Setting)

Delay Fixed: 7.5 sec. at 6 x Current Setting

Thermal Memory as Standard

Rating Plug 4 to 6 Rating Plugs Available Per Sensor Rating: See STR 28D Control Unit, p. 8

Short-time Pickup 1.5 to 10 x Current Setting

Delay Bands 0–0.1–0.2–0.3–0.4 with I2t OFF

0.1–0.2–0.3 with I2t ON

Instantaneous Pickup High-set Fixed Type (3)—Defeatable on N1 and H1 Types

Ground-fault Protection (Option T or W) (4)

Pickup 0.1 x Current Sensor to 1200 A (5)

Delay Band 0.1–0.2–0.3–0.4 with I2t Ramp ON/OFF Switch

Fault Indicators (Option F)

Not Discriminated Local Mechanical Pop-out Type Indicator and LED Pre-trip Alarm

Remote Overcurrent Trip and Pre-trip Alarm Switches (see pp. 14–15)

Discriminated Local With Option F (see p. 14)

Built-in Ammeter (Option I)

Values Display Phase 1, 2, 3, Max., Neutral and Ground Current

Accuracy ±1.5% (6)

Bar Graph Indication Phases 1, 2, 3—10% steps

Control Power Not Required (7)

(1) According to time current curves: 105% to 120% of current setting.(2) With PIL option, fault indicator lights (15) will light up only when this button is pushed in.(3) See values on pp. 38–40.(4) Residual scheme (T). The maximum ground-fault pickup meets 1999 National Electrical Code paragraph

230-95 (a) (not exceeding 1200 A). Source Ground Return scheme (W) on request.(5) 0.1 minimum pickup requires 24 Vdc external power.(6) Total accuracy including current sensors: ±4.5%.(7) Control power not required for loads greater than 20% of current sensor. Required for loads less than

20% of current sensor if maximum demand memory requested (see diagram, p. 43).

11/98©1995 Square D—All Rights Reserved10

STR 58U Control Unit for Universal Application

1. Mechanical pop-out type fault indicator and reset button:n Indicates that a fault trip has occurredn Prevents closure of the circuit breaker after fault until reset

2. Switch selector for the type of fault to be remotely indicated and resetflat push button (see option FV, p. 15)

3. Ammeter (LCD digital display)4. Ammeter selector used to read:n Phase currents (1, 2, 3, N, ground)n Or the phase with the highest load current (max.)

5. Load indication (bar graph in % of current setting)6. Sensor rating7. Local and remote pre-trip alarm:n LED on at 90% of current settingn LED flashing on overload (according to time current curves: 105%

to 120% of current setting)n Remote indication by static contact

8. Rating plug (on STR 58UP)9. Long-time current setting

10. Long-time delay setting11. Short-time pickup12. Short-time delay13. Thermal memory min./max. selector14. Instantaneous pickup15. Ground-fault (option T or W) pickup16. Ground-fault (option T or W) time delay17. Available space for setting identification18. Load monitoring (option R) pickups (see p. 16)19. Test receptacle20. Fault indicator saving battery (option PIL)21. Local (option F) fault indicators consist of built-in light emitting diodes

which differentiate the three causes of tripping: overload, short circuitand ground fault, if any

22. Fault indicator reset or battery test button23. Fault indicator reactivating button (with PIL option, fault-indicator

lights (21) will only light up when this button is pushed in)

0631

3019

12

3

5

67891011

12

131415

1617

181920

push to reset I+T L+I

I

L+TL off

T

L+I+T

II1 I2 I3

90%

50%

20%

STR 58 U

Ir tr90

105

τtr

%Ir.88

.9 .92.95

.981.8

.85

xIo

60120 240

48015

30

at 1.5Ir

Im tm

34 5

6

8101.5

2

xIr

.3

.4 .3

.1.1

.2

on I2t off

.2

0

Ir fault

tr

Im fault

tm

I

faultIh

th

t

i

test

+ –

– +

T

R

F

test

Ih 1200A Max th

400500 600

800

10001200250

320

A

.3

.4 .4

.2.1

.2

on I2t off

.3

.1

I

812 14

19

22Max.2

4

xIn

Ic1 Ic2

.86.9 .93

.95

.981.8

.85

xIr

.7.8 .85

.95.5

.6

.9

1xIr

V

Ir :

Im :

th :

min.norm

overcurrent

ground

reset V

4

21

22

23

Control Units

11©1995 Square D—All Rights Reserved11/98

Control Units

Overcurrent Protection—RMS Sensing

Long-time Current Setting STR 58UP: 0.8 to 1 x Rating Plug (Pickup at 1.1 x Setting)

STR 58: 0.4 to 1 x Current Sensor (Pickup at 1.1 x Setting)

Delay Bands 0.94–1.88–3.75–7.50–15–30s at 6 x Current Setting

Thermal Memory as Standard with Min./Max. Selector

Rating Plug Current Sensor Plug Rating

250 A 250–200–150–125 A

400 A 400–300–250–200 A

600 A 600–500–400–300 A

800 A 800–600–500–400 A

1200 A 1200–1000–800–600 A

1600 A 1600–1200–1000–800 A

2000 A 2000–1600–1200–1000 A

2500 A 2500–2000–1600–1200 A

3000 A 3000–2500–2000–1600 A

3200 A 3200–3000–2500–2000–1600 A

4000 A 4000–3200–3000–2500–2000 A

5000 A 5000–4000–3200–3000–2500 A

6300 A 6300–6000–5000–4000–3200–3000 A

Short-time Pickup 1.5 to 10 x Current Setting

Delay bands 0–0.1–0.2–0.3–0.4 with I2t OFF

0.1–0.2–0.3 with I2t ON

Zone-selective Interlocking with Option Z (see p. 13)

Instantaneous Pickup Adjustable from 2 to Max. Value (1); Defeatable on N1 andH1 Types

Ground-fault Protection (Option T or W) (2)

Pickup Delay Band 0.1 x Current Sensor to 1200 A (3)

0.1–0.2–0.3–0.4 with I2t Ramp ON/OFF Switch

Zone-selective Interlocking with Option Z (see p. 13)

Fault Indicators (Option F)

Not Discriminated Local Mechanical Pop-out Type Indicator and LED Pre-trip Alarm

Remote Overcurrent Trip and Pre-trip Alarm Switches (see pp. 14–15)

Discriminated Local With Option F (see p. 14)

Remote With Option FV (see p. 15)

Built-in Ammeter (Option I)

Values Display Phase 1, 2, 3, Max., Neutral and Ground Current

Accuracy ±1.5% (4)

Bar Graph Indication Phase 1, 2, 3—10% Steps

Control Power Not Required (5)

Load Monitoring (Option R)

Inverse Time Alarm Pickups Ic1 = 0.8 to 1 x Current Setting

Ic2 = 0.5 to 1 x Current Setting

Time delay See Curve, p. 41

Outputs for Communication through DIGIPACT ® System (Option C)

Transmitted Values Entire Settings of the Trip Unit

Circuit Breaker Status: Open, Tripped, Closed

Alarms: Overload, Type of Fault, Internal Watchdog (6)

Ammeter Values: Phase, Neutral, Ground, Max. Currents

(1) See values on pp. 38–40.(2) Residual scheme (T). The maximum ground-fault pickup meets 1999 National Electrical Code paragraph

230-95 (a) (not exceeding 1200 A). Source Ground Return scheme (W) on request.(3) 0.2 minimum pickup only with external power.(4) Total accuracy including current sensors: ± 4.5%.(5) Control power not required for loads greater than 20% of current sensors. Required for loads less than

20% of current sensor if maximum demand memory requested (see diagram, p. 43).(6) Internal watchdog: Control unit internal temperature.

I

t

Long-time Pickup

Instantaneous Pickup

Short-time Pickup

Ground-faultPickup

Ground-faultDelay

Long-time Delay

Short-time Pickup

0631

3020

11/98©1995 Square D—All Rights Reserved12

Control Units

The thermal memory function remembers and integrates the thermal heating caused by each pickupsetting overrun. Before tripping, the integrated heating value will reduce the associated time delayand, therefore, the reaction of the control unit will be closer to the real heating of the power networksystem. After tripping, the memory will also reduce the time delay when closing the circuit breakeron fault.

HAZARD OF ELECTRICAL SHOCK, BURNOR EXPLOSION.

Use "min" position for emergency only whenclosing on fault is absolutely necessary.

Failure to observe these precautions willcause death, personal injury or electricalshock.

DANGER

STR Trip Units

The STR 38S and STR 58U trip units incorporate the thermal memory as standard:n Before tripping on long-time and ground-fault protection (if provided)n After tripping on long-time protection only, adjustable min./max. position for the STR 58U trip unit

is standardThe control unit measures the internal temperature rise of the circuit breaker by thermal resistors. Thecooling time constant of the memory is not fixed, but depends on the over-temperature condition.

0631

3183

0631

3184

0631

3185

0631

3186

STR Trip Unit withThermal Memory

Thermal Memory

Purpose

The thermal memory function allows an optimization of cables or bus bar protection in case of lowamplitude repetitive faults. Such faults can be due to repetitive motor startings, fluctuating load orsubsequent closing after a fault.

Traditional electronic protection has no effect when facing such repetitive faults because theduration of each overload above the pickup setting is too short to achieve effective tripping.Nevertheless, each overload involves a temperature rise in the installation, the cumulative effect ofwhich could lead to overheating of the system.

Principle

tr

push to reset

I1 I2 I390%

50%

20%

STR 58 U

Ir

xIo at 1.5IrIm tm

xIo

i

test

T

R

F

test

Ih th

xIn

I

xIn

Ic1 Ic2

xIr xIr

xIn

t

0631

3182

STR Trip Unit withoutThermal Memory

t

I

Pickup Setting

t

Temperature

t

I2t

Trip Level

t

I2t

Trip Level

13©1995 Square D—All Rights Reserved11/98

Neutral Sensor

Ground-fault protection may be applied on3Ø4W or 3Ø3W circuits. On 3Ø4W circuits anexternal neutral sensor must be used. Thisneutral current sensor must have the sameampere rating as the circuit breaker sensor.

0631

3023

Note: #18 to #14 AWG cables, max. length 90 ft./30m.

0631

3021

T1 T2

S1 S2

Neutral

Ground-faultNeutral CTs

T1

T2

S1

S2

Main Circuit Breaker

0631

3022

Zone-selective Interlocking (ZSI)

Option Z on the STR58U control unit providesselective interlocking on short time or groundfault. A pilot wire links several trip units in thedistribution network, as shown in the oppositefigure. In the event of a fault, the trip unit willrespond to the preset delay only if receiving asignal from the downstream unit. If not receivinga signal, the tripping will be instantaneous.Therefore, the fault is cleared instantaneouslyby the nearest circuit breaker: the thermalstresses (I2t) in the network are minimized,without any effect on the correct time-delaycoordination in the installation.

Fault 1

Circuit breaker A will clear the faultinstantaneously, regardless of its time-delaysetting.

Fault 2

Circuit breaker B will inform upstream circuitbreaker A that it is clearing the fault and willprevent it from tripping instantaneously. Circuitbreaker A will trip at the end of its time delaysetting if the fault is not cleared during this time.

Note:n Drawout circuit breaker terminals are

delivered with "in" terminals jumpered.Remove the jumper when interlocking with adownstream circuit breaker.

n The MASTERPACT circuit breaker may alsobe interlocked with COMPACT® NS and CKtype molded case circuit breakers with ZSIoption.

n Do not ground ZSI wiring.

Cable Size #18–#14 AWG/1.5mm2

Max. Length 90 ft./30 m

Wiring Twisted in Pairs One Turn per 4 in./10 cm

No. of Circuit Breakers Upstream: 2

Downstream: No Limit

Control Units

A

Out

In In In

Z12Z11Z22Z21

OutIn

Out

In

2

1

Z12Z11Z22Z21

Z12Z11Z22Z21

Z12Z11Z22Z21

Z12Z11Z22Z21

Z12Z11Z22Z21

Out

In

Out OutB

11/98©1995 Square D—All Rights Reserved14

Control Units

Fault Indicator (F)

In addition to the mechanical fault indicator, this indicator differentiates the three causes of tripping:overload, short circuit or ground fault, if any. Three light-emitting diodes indicate separately long-time, short-time/ instantaneous and ground-fault trip. A flat push button allows resetting of theindicator after tripping. A separate power supply is required to maintain the indication after trippingof the circuit breaker. Two different possibilities are offered:n Connecting a reliable 24 Vdc control voltage on F1-F2. Auxiliary power module (AD) is used for

other voltages. When the control source is considered as unreliable, a battery pack (BAT) is tobe added to an AD power module.

n From a built-in battery module. When no external control source is available, a built-in batterymodule may be ordered (option PIL). This module integrates battery testing and indicatorreactivating buttons.

Configuration with ReliableControl Voltage

Configuration withInterruptible Control Voltage

0631

3025 24 Vdc

1W

+

F1 F2

0631

3026

0631

3027

+

F1 F2

AD (1)

F1 F2

+

AD (1)

BAT

(1) AC: 120 V, 60 HzDC: 24–48–125 Vdc

Alarm Indicator Pre-trip Alarm Switch (ALR)

Delivered as standard with control unit. The alarm indicator is a fixed, front face light-emitting diodewhich operates as follows:n Fixed when the current exceeds 90% of the current setting.n Flashing on overload: according to time-current curves, 105% to 120% of current setting.The pre-trip alarm switch is a static contact which closes when in the overload zone, up to thetripping of the circuit breaker. This contact can be used for ultimate load shedding, alarm beforetripping, etc.

Output Characteristics 0.1 A/240 Vac (Optical Triac)

Power Supply Not Required

0631

3024

Ih

xIn

xIn

Ic1

push to reset

I1 I2 I390%

50%

20%

STR 58 U

Ir tr

xIo at 1.5IrIm tm

xIo

test

T

R

th

I

Ic2

xIr xIr

t

i

F

test

0631

3028

xIn

i R

push to reset

I1 I2 I390%

50%

20%

STR 58 U

t

test

F

test

I

xIr xIr

TIh th

xInIc1 Ic2

Ir tr

xIo at 1.5IrIm tm

xIo

ALR

15©1995 Square D—All Rights Reserved11/98

Control Units

Overcurrent Trip Switch (SDE)

Delivered standard with control unit. In addition to the fault trip indicator/reset button, one SPDTswitch provides alarm/lockout information. This SPDT switch is operated only when the circuitbreaker is tripped by the control unit. When the circuit breaker is reset, the "a" switch (alarm) isopen and the "b" switch (lockout) is closed.

Output Characteristics SPDT 10 A/240 Vac

Power Supply Not Required

0631

3031

82 84

81

SDE

Fault

V2

V1

V

Fault 0631

3032

C2

C1

RemoteOpen

MX

V2

V1

V

Fault

0631

3029

Segregated Trip Switch (FV)

This switch works exactly as the standard overcurrent trip switch (SDE) except that a commutatoron the front face is used to choose the type of fault which will operate the contact: overload, short-circuit, ground-fault, or any combination of these types. This option can be used in addition to theSDE switch for remote signalization of particular types of faults. A flat push button allows resetting ofthe indicator after tripping.

Output Characteristics 5 A/240 Vac

Power Supply Required

Wired in parallel with the remote opening button which operates the shunt trip, the option FVcontact provides an electrical interlock which prevents the circuit breaker from being closed after thepre-selected type of faults: for example the circuit breaker will be able to be remotely closed afteroverload, but not after short circuit.

0631

3030

Ih

xIn

xIn

Ic1

I1 I2 I390%

50%

20%

STR 58 U

Ir tr

xIo at 1.5IrIm tm

xIo

test

T

R

th

I

Ic2

xIr xIr

t

i

push to reset

F

test

V

11/98©1995 Square D—All Rights Reserved16

Control Units

Test Kits

Every control unit is equipped with a test receptacle that can be used with a test kit. Testsperformed by test kits are only functional tests designed to electrically test the operating integrity ofthe control unit, the flux transfer device and the mechanical operation of the circuit breaker. Testsare not designed to calibrate the circuit breaker. Calibration can only be done at the factory.

0631

3035

0631

3034

Load monitoring (R)

Option R provides two independent static contacts which operate when the current exceedsadjustable pickup limits:n When the current exceeds the limit Ic1 (or Ic2), the contact C-R1 (or C-R2) closes following an

inverse time characteristic A.n When the current drops below the limit Ic1 (or Ic2), the contact C-R1 (or C-R2) opens with

constant time delay (10 seconds) B.These contacts can be used for load shedding, alarms, indications, etc.

Voltage 240 Vac max.

Outputs 0.1 A triac

0631

3036

xIn

i R

push to reset

I1 I2 I390%

50%

20%

STR 58 U

Ir tr

xIo at 1.5IrIm tm

xIot

test

F

test

I

xIr xIr

TIh th

xInIc1 Ic2

0631

3033

Mini Test Kit

Calibration Test Kit

I

t

Long-time

BA

17©1995 Square D—All Rights Reserved11/98

Control Units

Communication

MASTERPACT circuit breakers can be easily connected to a supervising personal computer usingthe DIGIPACT® system. The following four functions can thus be provided:n Indication:o Status of the circuit breaker (on, off or tripped; connected or disconnected)o Causes of tripping (overload, short circuit or ground fault)n Monitoring:o Operation of circuit breaker (open, closed or reset)o Resetting a molded case circuit breaker (COMPACT NS and CK)n Management:o Control unit settingso Pre-trip alarmo Load monitoring statuso Control unit internal temperature alarmo Number of operation cycles performed by the circuit breakern Metering:o RMS value of the current in three phases

0631

3037

pulsar SVMERLIN GERIN

N∞1N∞1

1 3

OK

error

com

24V

com

error

JBus

BBus DIGIPACT DC150 Data Concentrator

SC150 Indication andControl Interface

SC150 Indication andControl Interface

MASTERPACT Circuit Breakerwith STR 58U Trip Unit and Communications Option

MASTERPACT Circuit Breakerwith STR 58U Trip Unit and Communications Option

COMPACT NS Circuit Breakerwith Communications-typeAuxiliary Switches, Motor Operator and Carriage Switches

pushto

trip

push

push

Communication with Supervision,Personal Computer

®

POWERLOGIC Circuit Monitor

® POWERLOGIC Power Meter

MODBUS /JBUS

Internal Bus

MERLINGERIN

multi 9

ATB1s

ATB MULTI 9 Interfacefor C60 with Motor Operator

®

11/98©1995 Square D—All Rights Reserved18

Control Units

SC150 Indication and Control Interface

Function

The SC150 indication and control interface is used to:n Transmit to the DC150 data concentrator:o Status information (on, off, tripped, tripped due to electrical fault, tripped due to ground fault)

for COMPACT CK and MASTERPACT circuit breakers or any other power circuit actuatoro The connected or disconnected status of withdrawable COMPACT CK and MASTERPACT circuit

breakerso The status of any external contactn Receive commands transmitted by a personal computer or programmable logic controller (PLC)

via the DC150 data concentrator (on, off and reset of the COMPACT CK and MASTERPACTcircuit breakers or any other power circuit actuator)

n Receive the information transmitted by the communications option on electronic control units(STR43, STR53, STR55 and STR58) installed in COMPACT NS, COMPACT CK andMASTERPACT circuit breakers:

o Trip-unit settingso The RMS value of the current in the three phases and the neutralo Current overloadso The causes of tripping (overloads, short circuits or ground fault)n Count the number of cycles carried out by the device

The SC150 interface is connected to:n The DC150 data connectorn The auxiliary switches (OF, SD, SDE, SDV, CE, CD) on the circuit breaker with which the interface

is associatedn The motor operator for execution of the on, off and reset commandsn The communications outputs of the STR43, STR53, STR55 and STR58 control units installed in

COMPACT NS, COMPACT CK and MASTERPACT circuit breakersA non-assigned digital input is available for other use. The SC150 interface is associated with asingle circuit breaker.

Important: The SC150 interface is used with COMPACT NS circuit breakers to:n Remote to the user the information supplied by the communications option on STR43 and STR53

control unitsn Actuate non-communicating motor operatorsn Count the number of cycles carried out by the circuit breaker

Note: When associated with the SC150 interface, COMPACT NS circuit breakers are equipped withstandard auxiliary switches and motor operators. The SC150 indication and control interface is notrequired with COMPACT NS circuit breakers equipped with communication-type auxiliary switchesor a communication-type motor operator.

Information or Function Managed by the SC150 Indication and Control InterfaceInformation Transmitted or Devices Associated with the SC150 InterfaceFunction Carried Out

Display Device Status: Circuit Breaker or Other Power-circuit Actuatorn On, Off + Standard OF Auxiliary Switchesn Tripped + Standard SD Auxiliary Switches (COMPACT Circuit Breakers)n Tripped Due to Electrical Fault + Standard SDE Auxiliary Switchesn Tripped Due to Ground Fault + SDV Auxiliary Switches (COMPACT NS) or Output Contact of a Ground-fault Relayn Connected or Disconnected Position + Standard CE and CD Auxiliary Switches

Remotely Control a Device (On, Off or Reset) COMPACT or MASTERPACT Circuit Breaker Equipped with Standard Motor Operator

Count the Number of Operating Cycles As Above

Display the Cause of Tripping and the COMPACT or MASTERPACT Circuit Breaker Equipped with STR43, STR53, STR55Trip Unit Settings (Settings and Time Delays) or STR58 Electronic Trip Unit with Communications Option (COM)

Trip an Alarm for Long-time Fault As Above

Display the Value of the Current for Each Phase As Above

Display Internal Temperature of Switchboard PT100 Probe –4 to 212°F (–20 to 100°C)

0631

3038

19©1995 Square D—All Rights Reserved11/98

Control Units

SC150 Indication and Control Interface (continued)

Technical DataDigital Inputs (24 V, Self-powered by the SC150 Interface)

O Auxiliary Switch One Input

F Auxiliary Switch One Input

SD Auxiliary Switch (Tripping) One Input

SDE Auxiliary Switch (Tripping Due to Electrical Fault) One Input

CE Auxiliary Switch One Input

CD Auxiliary Switch One Input

SDV Auxiliary Switch (Tripping Due to Ground Fault) One Input

Other Uses One Unassigned Input

Electrical Characteristics

Voltage (Supplied by SC150) 24 Vdc

Current (Supplied by SC150) 120 mA dc

Resistance in On-state < 30 mΩ

Resistance in Off-state > 10000 MΩ

Control Outputs

Opening One N.O. and N.C. Control Terminal

Closing One N.O. Control Terminal

Reset One N.O. Control TerminalNote: The opening, closing and reset control signals delivered by

the SC150 interface are of the impulse type. The pulseduration is one second for the closing signal and twoseconds for the opening and reset signals.

Voltage 100–440 Vac/24–250 Vdc

Interrupting Rating AC 2500 VA

DC 300 W Continuous/500 W for Two Seconds

Utilization Category AC15/DC13 as Defined by IEC 947-5

Operating Temperature Range –13 to 158°F (–25 to 70°C)

Storage Temperature Range –67 to 185°F (–55°C to 85°C)

Damp Heat Not in Operation (IEC 68-2-30) 6 cycles 77°F (25°C)/131°F (55°C)/RH 95%

Damp Heat in Operation (IEC 68-2-56) 2 days 86°F (30°C)/RH 93%

Salt Mist (IEC 68-2-52) Kb Test, Severity Level 2

Electromagnetic Compatibility Electrostatic Discharges Level 3(IEC 1000-4-2)

Radiated Susceptibility Level 3(IEC 1000-4-3)

Low-energy Conducted Level 4Susceptibility (IEC 1000-4-4)

High-energy Conducted Level 4Susceptibility (IEC 1000-4-5)

Conducted and Radiated Class AEmissions (EN 50081-1)

Dimensions 2 x 4 x 6.5 in. (50 x 105 x 165 mm)

Weight 2.5 lb. (1 kg)

Degree of Protection (as Per IEC 529) Front Face IP30

Other Faces IP30

Connections IP20

Vibrations (Lloyd’s 1996) Fc Test 5–13.2 Hz: .04 in. (1 mm)

13.2–100 Hz: .03 oz. (0.7 g)

Wiring Diagram

See p. 44

Dimensions

See pp. 61

11/98©1995 Square D—All Rights Reserved20

Control Units

DC150 Data Concentrator

Function

The DC150 data concentrator is used to:n Centralize all the information supplied by the various communicating devices:o Auxiliary switches and motor operatoro SC150 indication and control interfacen Make information available to a personal computer or programmable logic controller (PLC) via the

MODBUS/JBUS protocoln Log status changes and tripping of the communicating circuit breakers in order to provide the

user with a list of time-stamped eventsn Supply the 24 V and 15 V power required by the communicating devices and the internal busn Carry out addressing for the communicating devicesEach DC150 data concentrator can be connected to a maximum of 48 instrumented outgoing orincoming circuits.

0631

3039

Information or Function Managed by the DC150 Data ConcentratorInformation Transmitted or Devices Required to Display the Information orFunction Carried Out Carry Out the Function

Display Device Status: Circuit Breaker or Other Power-circuit Actuator

n On, Off, Tripped, Tripped Due to Electrical Fault, o COMPACT NS Circuit Breaker + Communicating Auxiliary SwitchesConnected, Disconnected o COMPACT/MASTERPACT Circuit Breaker + SC150 Indication and Control

Interfaceo COMPACT NS Circuit Breaker + Communicating Auxiliary Switcheso MULTI 9 Control Device + ATB Interface

n Tripped Due to Ground Fault o COMPACT NS Circuit Breaker + Vigi or Ground-fault Relay + SC150Indication and Control Interface

Remotely Operate a Circuit Breaker n COMPACT NS Circuit Breaker + Communicating Motor Operator(On, Off or Reset) n COMPACT/MASTERPACT Circuit Breaker + SC150 Indication and Control

Interfacen MULTI 9 Control Device + ATB Interface

Inhibit Reset Following Tripping Due As Aboveto Electrical Fault

Select Operating Mode of Motor As Above + CLS150 Indication and Local Control ModuleOperators (Local or Remote)

Measure Currents (Phases and Neutral) COMPACT/MASTERPACT Circuit Breaker Equipped with Electronic Control UnitComprising Communications Option + SC150 Indication and Control Interface

Count Number of Operating Cycles SC150 Indication and Control Interface

Display Causes of Tripping COMPACT/MASTERPACT Circuit Breaker Equipped with Electronic Control UnitComprising Communications Option + SC150 Indication and Control Interface

Display Trip Alarm for Long-time Fault As Above

Display Trip Unit Settings As Above(Thresholds and Time Delay)

Junction Block

0631

3041

Internal Bus Cable

0631

3042

RS232/RS485 Converter

0631

3040

AccessoriesConnection Cable for Internal Bus Cat. No. 50779 65 ft. (20 m)

or 50780 330 ft. (100 m)

Junction Block for Internal Bus Cat. No. 50778

RS485/RS232 Conversion Unit Cat. No. 50786

Connection to Personal Computer An RS232/RS485 converter is required for connection to a personal computerequipped with an RS232 output to the MODBUS/RS485 bus.

Connector

0631

3116

21©1995 Square D—All Rights Reserved11/98

Control Units

Description

1. LED indicating that address is correct2. LED indicating that address is incorrect3. LED indicating presence of 24 V power4. LED indicating communication on

internal bus5. LED indicating MODBUS/JBUS

communication6. LED indicating MODBUS/JBUS error7. MODBUS/JBUS speed setting

8-9. Coding wheels for JBUS address10. JBUS connector11. Power supply connector12. Internal bus connector13. Confirmation button

14-15. Keys for DIGIPACT module addresses16. Address display

0631

3043

Technical DataElectrical Characteristics

Voltage 110–240 Vac/115–125 Vdc

Tolerance +10%–15%

Operating Temperature Range –13 to 158°F (–25 to 70°C)

Storage Temperature Range –67 to 158°F (–55 to + 70°C)

Electromagnetic Compatibility Electrostatic Discharges Level 3(IEC 1000-4-2)

Radiated Susceptibility Level 3(IEC 1000-4-3)

Low-energy Conducted Level 4Susceptibility (IEC 1000-4-4)

High-energy Conducted Level 4Susceptibility (IEC 1000-4-5)

Conducted and Radiated Class AEmissions (EN 50081-1)

Protocol MODBUS/JBUS (Slave)

Speed 9600 or 19200 Baud

Data Format Eight Bits, No Parity, One Stop

Physical Link RS485 (2-Wire or 4-Wire)

Implemented MODBUS/JBUS Protocol Functions Read N Consecutive Bits Function 1 or 2

Read N Words Function 3 or 4

Write One Bit Function 5

Write One Word Function 6

Write N Bits Function 15

Write N Words Function 16

Weight 4 lb. (1.5 kg)

Degree of Protection (as Per IEC 529) IP30

IP20 (Connections)

Wiring Diagrams

See p. 45

Dimensions

See p. 61

MERLIN GERIN

DC150Digipact

0

8

43

2 1

CD

EF

5

6 7

B

A9

0

8

43

2 1

CD

EF

5

6 7

B

A9

OK

error

com

error

com

24V

N°1 N°2

N°1

N°2

960019200

BBus JBus

6 53 42 1

7

8

9

1014

15

13

16

12 11

DC150 Data Concentrator (continued)

11/98©1995 Square D—All Rights Reserved22

Control Units

Sizing of the DIGIPACT Internal Bus

Sizing of the DIGIPACT internal bus depends on two factors:n The number of devices on the busn The length of the bus

Number of Devices

As on any communications network, the number of devices that may be connected on theDIGIPACT internal bus is limited. The maximum number of devices is calculated in terms of"communication points." Each type of device represents a number of points indicated in the tablebelow. The total number of points for the various devices connected to a single bus must not exceed100. If the required devices represent more than 100 points, simply add a second DIGIPACTinternal bus with a second DC150 data concentrator. The same sizing rules apply to the second busas well.

Communicating Device Number of Points

DC150 Data Concentrator 4

Communicating Auxiliary Switches OF, SD, SDE for COMPACT® NS Circuit Breakers 2

Communicating Motor Operator and Auxiliary Switches for COMPACT NS Circuit Breakers 2

Communicating Auxiliary Switches CE and CD for COMPACT NS Circuit Breakers 0

SC150 Indication and Control Interface 4

CLS150 Indication and Local Control Module Associated with:n Communicating Auxiliary Switches 0n Communicating Motor Operator and Auxiliary Switches 0n SC150 Indication and Control Interface 0

PM150 Power Meter 4

ATB MULTI 9 Interface 2

Length of Bus

The table below indicates the cross-sectional area of the cable that must be used depending on thetotal length of the bus.Cross-sectional Area Maximum Length of Bus

0.03 in.2 (0.75 mm2) 660 ft. (200 m)

0.06 in.2 (1.5 mm2) 1310 ft. (400 m)

0.1 in.2 (2.5 mm2) 2300 ft. (700 m)

The total resistance of the two wires for the bus must be less than 12 ohms. If the bus is too long,simply:n Increase the cross-sectional area of the cable.n Create two shorter buses for the installation (in this case, a second DC150 data concentrator

is required).

23©1995 Square D—All Rights Reserved11/98

Additional Connections (BS):

Single connection only is allowed in the terminal block. Multiple connections have to be made byadding extra terminals in the block located on the stationary assembly. The BS option consists offive additional terminals.

Connection:

Accessory terminals are maintenance-free and may be connected by standard #18 to #14 AWGcopper wires. Cable strip length: 3/8 in. (10 mm).

0631

3046

CONNECTED

TEST

DISCONNECTED

DisconnectedPositionSwitches

TerminalBlock

ConnectedPositionSwitches

AuxiliarySwitches

OvercurrentTrip Switch

Opening Coil

Closing Coil

Heavy UsageAuxiliarySwitches

Ready toClose Switch

SpringChargingMotor

push to reset

I+T L+I

I

L+TL off

T

L+I+T

I

I1 I2 I3

90%

50%

20%

STR 58 U

Irtr

90

105

τ tr

%Ir

.88.9 .92

.95

.981.8

.85

xIo

60120 240

480

1530

at 1.5Ir

Imtm

3

4 56

8

101.52

xIr

.3

.4 .3

.1

.1.2

on I2t off

.2

0

Ir fault

tr

Im fault

tm

I

faultIh

th

t

i

test

+ –

– +

T

R

Ftest

Ih 1200A Max th

400500 600

800

1000

1200250

320

A

.3

.4 .4

.2

.1.2

on I2t off

.3

.1

I

8

12 1419

22

Max.2

4

xIn

Ic1 Ic2

.86

.9 .93.95

.98

1.8.85

xIr

.7.8 .85

.95

.5.6

.9

1xIr

V

Ir :

Im :

th :

min.norm

overcurrent

ground

reset V

Accessories

Secondary Disconnects

Electrical accessories are UL Listed for field installation per UL file E113554. They are provided withterminals and located on secondary disconnecting blocks above the circuit breaker:n Fixed-mounted: By one or two connecting plugs (provided).n Drawout-mounted: To terminal block A located in the front of the stationary assembly for easy

access. (This terminal block is then wired to another connection block B that operatesautomatically to isolate the internal accessories when the circuit breaker is in the disconnectedposition.)

0631

3044

0631

3010

Fixed-mounted Circuit Breaker Drawout-mounted Circuit Breaker

A

B

Location

11/98©1995 Square D—All Rights Reserved24

Accessories06

3130

47

The MASTERPACT circuit breaker is equipped with a true two-step stored energy mechanism whichensures fast opening and closing operations and complete open-close-open sequence withoutrecharging the mechanism. The MASTERPACT circuit breaker has manual actuators that include acharging handle and push-to-open and push-to-close buttons. In addition, remote operation ispossible with the following field-installable accessories:n Spring charging motor (MCH)n Closing release (XF)n Undervoltage trip device (MN) or shunt trip (MX) for openingThe manual operating mechanism can still be used in an emergency. The addition of the electricaloperating mechanism does not alter circuit breaker dimensions.

Spring-charging Motor (MCH)

The spring-charging motor automatically charges the stored energy mechanism (when the circuitbreaker closes) making O–C–O cycles possible without recharging. Opening and closing operationsare instantaneous.

Control Voltage (V) 60 Hz 120–240

DC 24–48–125

Consumption AC 180 VA

DC 180 W

Inrush Current 2 to 3 x In for 0.1 sec.

Charging Time 3 to 4 sec.

0631

3048

262 B4

B1

CH

SpringCharged

M

Operation Counter (CDM)

With spring-charging motor option only. The operation counter is read from the front and gives thetotal number of circuit breaker operating cycles.

Spring-charged Switch

This type "b" switch is closed when the spring is charged. It comes standard with the springcharging motor and is provided with a common terminal.

Max. Current (A)

60 Hz 240 V 10

DC 125 V 0.5

250 V 0.25

25©1995 Square D—All Rights Reserved11/98

Accessories

Closing Coil (XF)

This device releases the circuit breaker closing mechanism when the spring is charged. The closingcoil is rated for continuous duty. The closing release is supplied on request and can be fitted evenon a manual operating mechanism.

A4

A1

RemoteClose

XF

0631

3050

Anti-pumping Function

When the closing coil (XF) is permanently energized, the circuit breaker remains in the openposition after it has been opened, either by manual or electrical operation. The circuit breaker canonly be closed if the closing coil is momentarily de-energized (see p. 32).Note: This anti-pumping function can be disabled by series connecting a ready-to-close ("b" contact)switch (PF) to the closing coil.

Circuit Breaker Closing Time Less Than 80 ms

Operating Voltage Range 0.85 to 1.1 x Rated Voltage

Control Voltage (V) 60 Hz 120–240

DC 24–48–125

Consumption (Inrush and Sealed) 60 Hz 20 VA

DC 15 W

0631

3049

11/98©1995 Square D—All Rights Reserved26

Accessories06

3130

49

0631

3051

0631

3052

C2

C1

MX

RemoteOpen

D4

D1

RemoteOpen

MN

Instantaneous Undervoltage Trip Device (MN)

This release instantaneously opens the circuit breaker when supply voltage drops below a valuebetween 35% and 70% of rated voltage. If the release is not energized, the circuit breaker cannotbe closed (either manually or electrically). Any attempt to close it will have no effect on the maincontacts. Closing is possible when the release voltage reaches 85% of its rated value. Theinstantaneous undervoltage trip device is field-installable.

Control Voltage (V)

60 Hz 120–240–480

DC 24–48–125–250

Consumption (Inrush and Sealed)

AC 20 VA

DC 15 W

Operating Time 40 ms

Opening Coils

Three types of voltage releases can be used for remote opening of the circuit breakers:n Shunt trip (MX)n Instantaneous undervoltage trip device (MN)n Time-delayed undervoltage trip device (MNR)

Possible Combinations

Each MASTERPACT circuit breaker can be equipped with:n One shunt trip (MX) + one undervoltage trip device (MN or MNR)n Or two shunt trips (MX)

Shunt Trip (MX)

This release is rated for continuous duty and operates with control voltages between 85% and 110%of its rating. However, when series connected with an "a" auxiliary switch, the shunt trip can beoperated with 55% or more of its rated voltage and can be used for ground-fault protection whencombined with a Class 1 ground-fault sensing element. The shunt trip is field-installable.

27©1995 Square D—All Rights Reserved11/98

Accessories06

3130

53

0631

3054

12 14

OF

22 24 32 34 42 44

Closed

Open

11 21 31 41

Time-delayed Undervoltage Trip Device (MNR) (1)

To prevent the circuit breaker from tripping in the event of transient voltage drops, this release has abuilt-in adjustable time delay. If required, this time delay can be overridden by connecting anexternal switch on an additional circuit (wired by the user). The undervoltage trip device is field-installable.

MN MNR (1)

Control Voltage (V)

60 Hz 120 120

240 —

480 480

DC 24 —

48 —

125 —

250 —

Consumption (Inrush and Sealed)

AC 20 VA 20 VA

DC 15 W 15 W

Operating Time (s)

0.09 0.5–0.9–1.5–3

(1) Not UL Listed.

Heavy Usage Auxiliary Switches (OF)

Four SPDT switches with double break construction. They are directly operated by the maincontacts and ensure a large insulation distance in open position. They are therefore particularlysuitable for insulation of auxiliary circuits or reliable interlockings.n "a" contacts are open when the circuit breaker is open and closed when the circuit breaker is

closed.n "b" switches are closed when the circuit breaker is open and open when the circuit breaker is

closed.See page 30 for operating diagrams. Auxiliary switches are field-installable.

11/98©1995 Square D—All Rights Reserved28

Accessories

24 Additional Auxiliary Switches (OFSUP)

An external plate holds a set of 24 SPDT switches operated by means of a cable. They areavailable only for drawout circuit breakers.

0631

3055

0631

3056

212

211

F

Open

222

221

F

234

231

O

244

241

O

Closed

0631

3057

252 254

251

PF

Ready-to-Close

Ready-to-close Switch (PF)

This SPDT switch indicates that the circuit breaker is ready to close and that the followingconditions exist:n The circuit breaker is openn The stored energy mechanism is chargedn The control unit is resetn The circuit breaker opening push button is neither locked nor padlockedn The circuit breaker is in the fully-connected or test positionThe switch is field-installable.

Standard Auxiliary Switches (O and F)

2a + 2b switches available as standard:n "a" contacts are open when the circuit breaker is open and closed when the circuit breaker is

closed.n "b" switches are closed when the circuit breaker is open and open when the circuit breaker is

closed.See page 30 for operating diagrams.

29©1995 Square D—All Rights Reserved11/98

Accessories

Connected Position Switches (CE)

A block of four SPDT switches operate when a drawout circuit breaker is in the connected position.The switch block is field-installable.

Disconnected Position Switches (CD)

A block of two SPDT switches operate when a drawout circuit breaker is in the disconnectedposition. The switch block is field-installable. See page 30 for operating diagrams.

Test Position Switch (CT)

One SPDT switch is operated only when the circuit breaker is in the test position. The switch is field-installable.

Connection by 1/4 in. Male Quick Connect Terminal

0631

3060

Current Ratings (A)Voltage (V) Auxiliary Switch Ready-to-close Position Switch

Heavy Usage Standard 24 Additional Switch Connected Disconnected Test

60 Hz 240 10 15 15 12 15 15 15

480 10 (1) 6 6 6 6 6

600 6 3 3 3 3 3

DC 125 3 0.5 0.5 0.5 0.5 0.5

250 3 0.25 0.25 0.25 0.25 0.25

See page 65 for IEC voltage ratings.(1) 8 A for MC08.

314 312

311

324 322

321

352 354

351

362 364

361

Connected

Disconnected

372 374334 332

321

344 342

321 371

Test

0631

3058

0631

3059

Disconnected Position Switches (CD) Connected Position Switches (CE)

11/98©1995 Square D—All Rights Reserved30

Accessories

b

a

.1.4

.2

a

b

.1.4

.2

.1 .2b

.1 .4a

210

inch

530

mm

421

Open

Closed

13/8 in. (35 mm)Between Contacts

Open

ClosedOpen

Closed

3/8 in. (9.5 mm)Between Contactsin Open Position

OpenClosed

ClosedOpen

OpenClosed

ClosedOpen

FullyOpen

FullyClosed

Operating Diagrams

Auxiliary Switches

Position Switches

Note: Position switches are shown with the circuit breaker in the connected position.

Note: Contacts are shown with the circuit breaker in the open position. Scale applies only todistance between main contacts.

Main Contact Position

Heavy Usage (OF)

Standard (O)

Standard (F)

24 Additional (OFSUP)

Main DisconnectPosition

Secondary DisconnectPosition

Connected PositionSwitches (CE)

Disconnected PositionSwitches (CD)

Test Position Switches(CT)

Disconnected Test Connected

Open Closed

Closed Opena

b

.1.4

.2

Connected

Connected

Open

Closeda

b

.1.2

.4

Closed

Open

Open

Closeda

b

.1.4

.2

Closed

Open

Open

Closed

Isolation Distance (1 in. [25.4 mm] or More)

Isolation Distance (1/2 in. [13 mm] or More)

0631

3061

0631

3062

31©1995 Square D—All Rights Reserved11/98

0631

3063

Accessories

Push Button Locking Device (VBP)

This device prevents local manual operation of the circuit breaker by covering the opening and/orclosing the push buttons. This locking device can be locked by a padlock or a sealing lead.

Open Position Lock (VSKA)

A key interlock that locks the circuit breaker in the open position by holding the push button in itsdepressed position. The key interlock is provided.

Door Interlock (VPEC)

This lock prevents the compartment door from being opened when the circuit breaker is in theconnected position. If the circuit breaker is put into the "connected" position with the door open, thedoor can be closed without disconnecting the circuit breaker.Note: For greater protection, this interlock can be used with racking interlock (VPOC) below.

Racking Interlock (VPOC)

This lock prevents racking in the circuit breaker when the door is open. (Insertion of the circuitbreaker racking crank is not possible when the compartment door is open.)

Disconnected Position Locking

The circuit breaker can be locked in the disconnected position by means of one to three padlocks(padlocks not provided) or one key interlock (factory-mounted option VSKC). The key interlock is onthe stationary assembly and accessible with the cubicle door locked.Note:n Key interlock is of the captive key type, free when locked.n By special order, locking may be possible on disconnected, test and connected positions

(VSKEC).

Spring Charge Interlock (VEAA)

This selection is for a device that prevents the circuit breaker or switch from being fully withdrawnfrom its cradle when the closing spring is charged. It is standard for ANSI (UL1066) circuit breakersand an option on others. The VEAA interlock is not compatible with undervoltage releases (MN,MNR or MNRI).

0631

3065

0631

3064

Push Button Locking Device (VBP) Open Position Lock (VSKA)

11/98©1995 Square D—All Rights Reserved32

Accessories

Mechanical Interlocks

n Disconnecting When Circuit Breaker Is Closed:During any disconnecting attempt when the circuit breaker is closed, an interlocking deviceensures the tripping of the circuit breaker before the actual separation of the main disconnects.The circuit breaker remains, however, operable in the other positions: test, disconnected andwithdrawn.

n Circuit Breaker Closing When Not Completely Connected:The interlocking device mentioned above prevents closing of the circuit breaker if the connectingoperation is not completely achieved.

n Connecting Circuit Breaker When Door Opened:VPEC and VPOC options prevent the compartment door from being opened when the circuitbreaker is in the connected position and from connecting the circuit breaker when the door isopen.

Electrical Interlocks

n Priority of Opening Orders (Standard):Opening coils (undervoltage trip devices, shunt trip) and opening push button have priority overthe closing coils and closing push button.

n Mechanical Pop-out Type Indicator (Standard):Under overcurrent or ground-fault conditions, the trip indicator located in the control unit will popout. It is not possible to close the circuit breaker until this trip indicator is reset. This standardfunction can be disabled upon request.

n Anti-pumping Function (Standard):In case the closing coil (XF) becomes permanently energized, the circuit breaker remains in theopen position A after it has been opened, either by manual or electrical operation. The circuitbreaker can be closed only if the closing coil is momentarily de-energized B.Note: This anti-pumping function can be disabled by series connecting a "ready to close" (NCcontact) switch (PF) with the closing coil (XF).

0631

3066

WithoutAnti-pumpingFunction

ON ON

OFF

ON

OFF OFF

OFF B

ON

OFF OFF A

ON

Closing Coil

CircuitBreaker Status

Shunt Trip (same anti-pumping function with undervoltage trip device)

33©1995 Square D—All Rights Reserved11/98

Interlocking Rods and Cables

Two or three MASTERPACT circuit breakers can be mechanically interlocked by means of rods orcables. This accessory is mountable on the right side of the circuit breaker. This adaptation can bemade on site without modifying the circuit breaker.

Mechanical Interlock Between Two or Three Stacked Circuit BreakersThis interlocking is obtained by the joining of:n One adaptation blockn One or two adjustable and nonadjustable rodsMaximum distance between the two fixing surfaces of the devices: 35 in. (0.89 m)

Mechanical Interlocks Between Two Side-by-Side Circuit BreakersThis interlocking is obtained by the joining of:n One adaptation blockn One set of adjustable cables with a maximum length of 78 in. (2 m)

Possible Mounting Arrangements Among Three Stacked Circuit Breakers

One use, power supplied by:n Two transformers N1 and N2 which are connected in paralleln Or one standby source G

0631

3067

0631

3070

0631

3069

0631

3068 GN2N1

N2N1C

N1 N2 N3

One use, power supplied by one group of transformers N1, N2 or N3 or of generators, preventingany connection in parallel.

Two uses, independently powered supply by two transformers N1 and N2, standby through a circuitbreaker or a connection tie switch, preventing the connection in parallel of the two currenttransformers.

Accessories

11/98©1995 Square D—All Rights Reserved34

Accessories

Safety Shutters (VO)

Comprising two independent parts, line and load side, the safety shutters automatically blockaccess to the main disconnects when the circuit breaker is in the disconnected, test or fullywithdrawn position.

Shutters Lock (VVC)

A factory-mounted movable and lockable slide (padlock not supplied) is used to:n Lock the line or load shutters in the closed positionn Hold the line or load shutters in the open positionA support is provided at the back of the stationary assembly to hold the slide when not in use.

0631

3071

0631

3074

StationaryAssembly

Circuit BreakerFrame

Possible ArrangementsFrame Stationary Frame Stationary

Assembly Assembly

A–B–C 4–5–6 B–C–D 1–5–6

A–B–D 3–5–6 B–C–E 1–4–6

A–B–E 3–4–6 B–C–F 1–4–5

A–B–F 3–4–5 B–D–E 1–3–6

A–C–D 2–5–6 B–D–F 1–3–5

A–C–E 2–4–6 B–E–F 1–3–4

A–C–F 2–4–5 C–D–E 1–2–6

A–D–E 2–3–6 C–D–F 1–2–5

A–D–F 2–3–5 C–E–F 1–2–4

A–E–F 2–3–4 D–E–F 1–2–3

Rejection Feature (VDC)

The rejection feature ensures that only the properly designated circuit breaker is matched with theselected cradle assembly. It is made of two parts (one for the frame and one for the stationaryassembly), and allows 20 different combinations.

0631

3073

Safety Shutters Shutters Lock

0631

3072

AB

CD

FE

12

34

56

35©1995 Square D—All Rights Reserved11/98

0631

3075

0631

3076

Interphase Barrier (EIP)

Mounted between terminals of the stationary assembly, the interphase barrier prevents arcprolongation to the circuit breaker in the event of a line side fault and isolates the circuit breakerconnections in insulated bus bar installations.

Transparent Cover (CB)

Hinged-mounted and locked with a milled head, this cover is designed to be installed on the doorescutcheon. It provides a higher degree of protection and is suitable for drawout or fixed-mountedcircuit breakers.

Interphase Barrier Transparent Cover

Accessories

11/98©1995 Square D—All Rights Reserved36

Switch06

3130

77 RatingsType Ampere Short-time Rating Short-circuit Withstand When

Rating (RMS Sym. Amperes) Protected by a MASTERPACT(A) 600 Vac Max. Circuit Breaker (A)

Max. Frame (A) 600 Vac Max.

MP08 NA 800 50,000 800 50,000

MP12 NA 1200 50,000 1200 50,000

MP16 NA 1600 50,000 1600 50,000

MP20 NA 2000 50,000 2000 50,000

MP25 NA 2500 50,000 2500 50,000

MP30 NA 3000 50,000 3000 50,000

MP40 NA 4000 85,000 4000 85,000

MP50 NA 5000 85,000 5000 85,000

MP63 NA (1) 6300 85,000 6300 85,000

(1) Not UL Listed.

Construction

The MASTERPACT switch is identical to the MP circuit breaker, except that the switch is notequipped with current transformers or an actual control unit. However, it does have an STR08dummy unit.

Accessories, Dimensions and Connections

Switch accessories, dimensions and connections are identical to those of the corresponding circuitbreaker, except that the overcurrent trip switch is not available with the switch version.

Page

Accessories 23

Wiring diagrams 42

Circuit Breaker Dimensions 46

HAZARD OF EQUIPMENT DAMAGE.

This switch contains no overcurrent protection.It is suitable for use at its ampere rating whenprotected by a MASTERPACT circuit breakerof the same ampere rating.

Failure to observe this precaution cancause equipment damage.

CAUTION

37©1995 Square D—All Rights Reserved11/98

Overcurrent Protection STR 28D Control Unit

0631

3078

Trip Curves

Multiple of Current Setting (Ir)

10 20 30 405 6 7 8 9 50 100

60 70 80 90432.5 .6 .7 .8 .91 1.5 200

300

400

500

600

700

800

900

1000

2000

3000

4000

8000

9000

1000

0

7000

6000

5000

.01

.1

.02

.03

.04

.05

.06

.07

.08

.09

1

.2

.3

.4

.5

.6

.7

.8

.9

10

2

3

4

5

6789

30

40

20

50

60708090100

200

300

400

500

6007008009001000

2000

3000

4000

5000

6000700080009000

.01

.1

.02

.03

.04

.05

.06

.07

.08

.09

1

.2

.3

.4

.5

.6

.7

.8

.9

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2

3

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5

6789

30

40

20

50

60708090

100

200

300

400

500

600700800900

1000

2000

3000

4000

5000

6000700080009000

10000

Instantaneous PickupI = 1.5–10 x Ir

1.2

10 20 30 405 6 7 8 9 50

10060 70 80 90432.5 .6 .7 .8 .91 1.5

200

300

400

500

600

700

800

900

1000

2000

3000

4000

8000

9000

1000

0

7000

6000

50001.2

Tim

e in

Sec

onds

Current Setting:STR 28D = 0.4–1 x Sensor RatingSTR 28DP = 0.8–1 x Plug Rating

11/98©1995 Square D—All Rights Reserved38

Trip Curves

Overcurrent Protection STR 38S Control Unit

0631

3079

(*) InstantaneousRating In (A) 630 800/1000 1200/1600 2000 2500 3000/3200 4000/5000/6300Fixed Threshold I = In x … 28 28 24 20 14 12 10

Tim

e in

Sec

onds

10 20 30 405 6 7 8 9 50 60 70 80 90432.5 .6 .7 .8 .9 1 1.5 100

20 30 40 50 60 3 4 5 6 7 8 910 20 30 40 60502

x Ir x In

1.2

1.2

.01

.1

.02

.03

.04

.05

.06

.07

.08

.09

1

.2

.3

.4

.5

.6

.7

.8

.9

10

2

3

4

5

6789

30

40

20

50

60708090100

200

300

400

500

6007008009001000

2000

3000

4000

5000

6000700080009000

105 6 7 8 9432.5 .6 .7 .8 .9 1 1.5.01

.1

.02

.03

.04

.05

.06

.07

.08

.09

1

.2

.3

.4

.5

.6

.7

.8

.9

10

2

3

4

5

6789

30

40

20

50

60708090

100

200

300

400

500

600700800900

1000

2000

3000

4000

5000

6000700080009000

100003 4 5 6 7 8 910 20 30 40 80 90 10

0

7060502

70 80 90 100

80 9010

070

0

0.3

0.2

0.1

0.4

Short-time PickupIm = 1.5–10 x (Ir)

0.3

0.2

0.1I t OFF

I t ONInst (*)

Current Setting:STR 38S = 0.4–1 x Sensor RatingSTR 38SP = 0.8–1 x Plug Rating2

2

2

39©1995 Square D—All Rights Reserved11/98

Overcurrent Protection STR 58U Control Unit

0631

3080

(*) InstantaneousRating In (A) 630 800/1000 1200/1600 2000 2500 3000/3200 4000/5000/6300Maximum Threshold I = In x 28 28 24 20 14 12 10

Trip Curves

.01

.1

.02

.03

.04

.05

.06

.07

.08

.09

1

.2

.3

.4

.5

.6

.7

.8

.9

10

2

3

4

5

6789

30

40

20

50

60708090100

200

300

400

500

6007008009001000

2000

3000

4000

5000

6000700080009000

.01

.1

.02

.03

.04

.05

.06

.07

.08

.09

1

.2

.3

.4

.5

.6

.7

.8

.9

10

2

3

4

5

6789

30

40

20

50

60708090

100

200

300

400

500

600700800900

1000

2000

3000

4000

5000

6000700080009000

3 4 5 6 7 8 910 20 30 40 80 90 100

7060502

0.3

0.2

0.1

Tim

e in

Sec

onds

10 20 30 405 6 7 8 9 50 60 70 80 90432.5 .6 .7 .8 .9 1 1.5 100

x Ir x In

1.2

3 4 5 6 7 8 910 20 30 40 80 90 100

706050210 20 30 405 6 7 8 9 50 60 70 80 90432.5 .6 .7 .8 .9 1 1.5

1001.2

Instantaneous PickupI = 2 x In Max (*)

I t OFF

I t ON

Short-time PickupIm = 1.5–10 x (Ir)

0.3

0.2

0.1

0.4

Current Setting:STR 58U = 0.4–1 x Sensor RatingSTR 58UP = 0.8–1 x Plug Rating

2

2

Instantaneous DialSettings800/1000 A

H1: 2–4–8–12–14–19–22–OffH2: 2–4–8–12–14–19–22–Max.

1200/1600 A

H1: 2–4–8–12–14–17–22–OffH2: 2–4–8–12–14–17–22–Max.

2000 A

H1: 2–4–8–10–12–14–17–OffH2: 2–4–8–10–12–14–17–Max.

2500 A

H1: 2–4–6–8–10–12–12–OffH2: 2–4–6–8–10–12–12–Max.

3000/3200 A

H1: 2–4–6–8–10–10–10–OffH2: 2–4–6–8–10–10–10–Max.

4000/5000/6300 A

H1: 2–4–6–8–8–8–8–OffH2: 2–4–6–8–8–8–8–Max.

11/98©1995 Square D—All Rights Reserved40

Trip Curves

Ground-fault Protection STR 38S–STR 58U Control Units

0631

3081 .15

Multiple of Current Sensor (In)

Tim

e in

Sec

onds

I t OFF

Ground-fault PickupIh = 0.1 x In 1200 A Max.

I t ON

1 1.2 1.5 2 3 4.5 .6 .7 .8 .9 5 106 7 8 9 20 30 40 50 60 70 80 90 100

200

300

400

500

600

700

800

900

1000

.4.3.2.05

.06

.07

.08

.09

.1

.01

.001

.002

.003

.004

.005

.006

.007

.008

.009

.1

.02

.03

.04

.05

.06

.07

.08

.09

1

.2

.3

.4

.5

.6

.7

.8

.9

10

2

3

4

5

6789

30

40

20

50

60708090

100

200

300

400

500

600700800900

1000

.01

.001

.002

.003

.004

.005

.006

.007

.008

.009

.1

.02

.03

.04

.05

.06

.07

.08

.09

1

.2

.3

.4

.5

.6

.7

.8

.9

10

2

3

4

5

6789

30

40

20

50

60708090100

200

300

400

500

6007008009001000

.12

.15 1 1.2 1.5 2 3 4.5 .6 .7 .8 .9 5 106 7 8 9 20 30 40 50 60 70 80 90 100

200

300

400

500

600

700

800

900

1000.4.3.2

.05

.06

.07

.08

.09 .1 .12

0.1

0.2

0.3

0.4

2

2

41©1995 Square D—All Rights Reserved11/98

Load Monitoring STR 58U Control Unit

0631

3082

Multiple of Current Setting (Ir)

.01

.1

.02

.03

.04

.05

.06

.07

.08

.09

1

.2

.3

.4

.5

.6

.7

.8

.9

10

2

3

4

5

6789

30

40

20

50

60708090

100

200

300

400

500

600700800900

1000

2000

3000

4000

5000

6000700080009000

10000

.1

.02

.03

.04

.05

.06

.07

.08

.09

1

.2

.3

.4

.5

.6

.7

.8

.9

10

2

3

4

5

6789

30

40

20

50

60708090100

200

300

400

500

6007008009001000

2000

3000

4000

5000

600070008000900010000

1 1.2 1.5 2 3 4.5 .6 .7 .8 .9 5 106 7 8 9 20 30 40 50 60 70 80 90 100

200

300

400

500

600

700

800

900

1000

.4.3.2.05

.06

.07

.08

.09

.1

Current SettingIr = 0.8–1 x Plug Rating

Ic2 = 0.5 1 x Ir

tr1 = tr / 2

tr2 = tr / 4

Ic1 = 0.8 1 x Ir

.12 .15

1 1.2 1.5 2 3 4.5 .6 .7 .8 .9 5 106 7 8 9 20 30 40 50 60 70 80 90 100

200

300

400

500

600

700

800

900

1000.4.3.2

.05

.06

.07

.08

.09 .1 .12 .15

.01

Tim

e in

Sec

onds

Trip Curves

11/98©1995 Square DÑ All Rights Reserved42

Wiring Diagrams

Diagram No. 689 889

Note: Circuit breaker shown in connected, charged and open position with undervoltage releases energized.

0631

3083

RemoteOpen

314 312

311

324 322

321

352 354

351

362 364

361

Connected

12 14 22 24 32 34 42 44

Open

Closed

11 21 31 41

MXMN

D4 C2

D1 C1

ShuntTripor

UndervoltageTrip Device

Disconnected

372 374

371

244

241

234

231

222

221

212

211

XF

A4

A1

252 254

251

262 B4

B1

PF CHOFStandard

334 332

331

344 342

341

SpringCharged

Connected Disconnected Standard HeavyDuty

Readyto Close

Motor Operator

Drawout Position Switches Auxiliary Switches Remote Operation

Test

Test

RemoteClose

43©1995 Square D—All Rights Reserved11/98

Diagram No. 689 889

(1) 84 terminal not available with Z or C option.(2) Zone-selective interlocking with downstream circuit breaker: remove

the jumper.(3) Communication output through DIGIPACT module.(4) Use 24 Vdc supply for loads less than 20% of current sensor

rating, or one-phase load less than 40% of sensor rating.

0631

3084

(5) Use 24 Vdc supply for lower setting.(6) Use 24 Vdc supply for F option if not supplied with PIL (battery)

option; use 24 Vdc supply (mandatory) for FV option.

Wiring Diagrams

Communication Network

FaultAlarm

LR2

LR1

1

82 84

81

SDELTAlarm

F1

I Option

F2

24 Vdc

T or W Option

V

LT ST Gnd

F or FV Option

Z21

Z Option

Z22

DownstreamCircuitBreaker

Out

In

Z11 Z12

UpstreamCircuitBreaker

OverloadAlarm

T2 T1

Ic1

R1 R2

C

R Option

Ic2

SelectedFault

C Option

e + e –

S2 S1

Ground-faultProtection

Remote Faultand OverloadIndication

AmmeterLocal Fault Indicationsand Remote SelectedFault Indication

Zone-selectiveInterlocking

LoadMonitoring

DataTransmission

+_(2)

(1)

(3)

(4) (5) (6)

11/98©1995 Square D—All Rights Reserved44

Wiring Diagrams

SC150 Indication and Control Interface

0631

3085

Internal BusMarking Color

24 V Red

0 V Black

Internal Bus – White

Internal Bus + Blue

630

24V0NC–+ e+ T–T+e– ON OFFSDE

NO NC ON CD SDV SDCE

IN

C1 C2 C3

C4

reset400

COM12 4

24-250V CC100-440V CA

L NSC150 Indication and Control Interface

DIGIPACTInternal Bus

To PowerSupply "L"

Control Outputs Inputs

Inputs

ExternalContact

To "IN"SC150Input Terminals

To "C4"SC150Input Terminals

MotorOperatorPower Supply

PT100TemperatureProbe

To SC150Terminals"T+" and "T–"

XF MX M

A4 C2 B4

A1 C1 B1

12 4

OF

12 4

SDE

12 4

CD

12 4

CE

12 4

e+ e –

12

SDE

MASTERPACT Circuit Breaker

Control UnitSTR28 / 38 / 58

To Power Supply "L"

to "NO"SC150 ControlOutput Terminals

To "ON"SC150 ControlOutput Terminals

To Power Supply "N"

To "C3"on SC150Input Terminals

To "CE"on SC150Input Terminals

To "CD"on SC150Input Terminals

To "OFF"on SC150Input Terminals

To "C4"on SC150Input Terminals

To "ON"on SC150Input Terminals

To "SDE"on SC150Input Terminals

To "C4"on SC150Input Terminals

To "SDE"on SC150Input Terminals

To AuxiliarySource

To "e +" and "e –"

Control UnitSTR58UControl Unit

on SC150"COM" Terminals

RemoteControl

45©1995 Square D—All Rights Reserved11/98

Wiring Diagrams

DC150 Data Concentrator

0631

3086

Connectors

The DC150 concentrator is connected using a SUBD9 male connector with a metal hood (e.g., ITTcanon, DE9P K83 + hood or DE115-500-5-RD). The DC150 concentrator is equipped with a SUBD9female connector. For a multidrop configuration, the tap-offs can be made either via a branching offof RS485 connector Catalog No. 50788 or standard connection boxes, taking care to respect thenecessary precautions when connecting the shieldings. The adaptation of an RS232 output on apersonal computer to accept the RS485 standard connector should be done with the RS485/RS232converter Catalog No. 50786.

DC150 Concentrator withPolarization and 2-wireAdaptation

0631

3087

0631

3088

Recommended Protection and Cable SizesRecommended Type Catalog No.Protection

C60N Supplementary Circuit Protector 3-Phase MG24466 or 24214Curve C–10 A

Fuse-link 10 A aM 15660

Marking (1) Connection Cable

A Voltages 0.06 to 0.1 in.2 (0.75 to 2.5 mm2)

B Internal Bus 0.03 to 0.1 in.2 (0.75 to 2.5 mm2) (Twisted)

C MODBUS/JBUS 0.03 to 0.1 in.2 (0.75 to 2.5 mm2) (Shielded)

Internal bus Marking Color

24 V Red

0 V Black

Internal Bus – White

Internal Bus + Blue

(1) See first drawing above.

0

8

43

2

CD

E

5

6 7

B

A9

0

8

43

2

CD

E

5

6 7

B

A9

N°1

N°2

1

5

6

9

9600

19200

DC150 Addresson MODBUS/JBUSNetwork

RS485MODBUS/JBUS

NC

110–240 Vac115–125 Vdc

Internal Bus +

Internal Bus –

0 V24 V

DC150

Protection

InternalBus

B

B

A C

MODBUS/JBUSSpeed

1Rp

Rp

Rc

2

3

4

5

6

7

8

9

0 V

0 V

5 V

RD+ (A')

RD– (B')

TD+ (A)

TD– (B)

1

2

3

4

5

6

7

8

9L– (B / B')

L+ (A / A')

11/98©1995 Square D—All Rights Reserved46

Circuit Breaker Dimensions

Door Interlock

Note: The door interlock can be mounted oneither the right side or the left side of the circuitbreaker.

0631

3095

0631

3096

0631

3097

0.123

14.5/368 MP3029.4/748 MP50/MC5038.4/978 MP63

0.123

1.6943

0.7920

0.154

0.8020

≤0.154

14.2360

2.3660Mounting

Holes17.5445

CircuitBreakerBase

Rear Cutout

Door Escutcheon (Fixed Mounting)

Note: Refer to shop drawings for verification.

0631

3092

0631

3093

0631

3094

Door Cutout Drilling of the Door

1.062712.8

3251.4838

MountingHoles

10.63270

0.19 Dia.∅5

6153

2.7269

5.83149

7.1180

0.6918

0.5715

2.8272

2.8272

7.1180

0631

3089

Door Escutcheon (Drawout Mounting)

0631

3090

0631

3091

12.8 325

2.17 55

1.85 47

0.75 19

2.666

1.77 45

Basis:MP08 to MP30MC08 to MC32

10.63 270

MP40 to MP63MC40/MC50

0.19 Dia.∅5

2.7269

MountingHoles

0.69/187.1180

7.1180

6153

5.83149

2.8272 0.73

19

Door Cutout Drilling of the Door

Dimensions: inchmm

47©1995 Square D—All Rights Reserved11/98

External Neutral Sensor

MP08 to MP20, MC08 to MC20 MP25/MP30/MP40, MC32/MC40

0631

3098

0631

3099

0631

3100

0631

3101

0631

3102

0631

3104

0631

3103

MP50 to MP63

0.5815

7.47190

0.5815

1.1730

2.1154

2.3560

2.3560 8.62

220

3.1380

0.5414

1.5740

9.12 / 9.41235 / 240

6.27160

3.589.5

2.19560.68

17.50.7820 7.84

200

4.7120

1.1730

= = = = = = =

0.9825

7.84200

0.5815

0.47 Dia.Ø12

Circuit Breaker Dimensions

Dimensions: inchmm

4.72120

0.7820

0.718

1.7545

6.30160

3.1580

0.718

1.7545

1.7545

0.718

0.56 Dia.∅14

4.72120

0.7820

0.718

6.30160

3.1580

0.718

1.7545

1.7545

0.56 Dia.∅14

0.718

1.7545

3.94100

1.846

2.974

2.3660

0.7920

1.7344

0.39/10MP08 to MP16MC08 to MC16

0.79/20MP20/MC20

3.94100

1.846

4.5114

2.3660

0.7920

0.79/20MP25/MP30/MC32

1.18/30MP40/MC40

3.3184

11/98©1995 Square D—All Rights Reserved48

Circuit Breaker Dimensions

4-Pole

0631

3109

0631

3111

0631

3112

3-Pole Note: Suitable forcontinuous operation at100% rating in aminimum cubicle space17.5 in. (440 mm) h. by21 in. (530 mm) w. by14.25 in. (360 mm) d.Ventilation is notrequired. Refer to shopdrawing #688 378 forverification. Verticalterminals are optionalfor MP08–MP12 circuitbreakers.

0631

3105

0631

3107 06

3131

0806

3131

0606

3131

10

4.53115

4.53115

3.3585

3.15800.98

250.9825 0.47 Dia.

∅12

4.53115

4.53115

3.3585

0.5 Dia.∅12,7

0.6316

14.88378

17.24438

15.75400 16.61

422

0.4311

0.4311

(4) MountingHoles0.44 Dia. / Ø11

0.9825

3.1580

4.53115

3.3585

4.53115

0.47 Dia.Ø12

4.53115 0.63

16

4.53115

4.53115

3.3585

0.5 Dia.Ø12,7

4.53115

0.4311

0.4311

20.2515

19.4493

21.8553

(4) MountingHoles0.44 Dia. / Ø11

3.1580

0.3910

4.41112

2.0853

0.6917,5

125,4

3.1580

5.59142

0.193

1.6943

15.78401

1.5740 Min.

5.91150

2.8372

1.18 / 30 Min.2.36 / 60 Max.

9.17233

2.6868

Cell (Insulation Not Required)

0.7118

11.14283

0.4912,5

Necessary Space for Removing the Arc Chutes

MP08–MP12–MP16 Fixed Mounting

Dimensions: inchmm

Note: Suitable forcontinuous operation at100% rating in aminimum cubicle space17.5 in. (440 mm) h. by25.5 in. (645 mm) w. by14.25 in. (360 mm) d.Ventilation is notrequired. Refer to shopdrawing #691 378 forverification. Verticalterminals are optionalfor MP08–MP12 circuitbreakers.

3.1580

0.3910

4.41112

2.0853

0.6917,5

125,4

3.1580

5.59142

0.193

1.6943

15.78401

1.5740 Min.

5.91150

2.8372

1.18 / 30 Min.2.36 / 60 Max.

9.17233

2.6868

Cell (Insulation Not Required)

0.7118

11.14283

0.4912,5

Necessary Space for Removing the Arc Chutes

49©1995 Square D—All Rights Reserved11/98

MP08–MP12–MP16–MC08–MC16 Drawout Mounting

4-Pole

0631

3117

0631

3119

0631

3120

3-Pole

0631

3113

0631

3115

0631

3120

0631

3114

0631

3118

4.53115

4.53115

1.8748

0.9825 0.47 Dia.

∅12

3.1580

4.53115

4.53115

1.8748

0.5 Dia.∅12,7

0.6316

17.14435

2.1755

2.1755

12.8325

(4) MountingHoles0.44 Dia./∅11

3.1580 3.23

82

5.98152

17.32440 Min.

0.6918

125

1.6542

0.4913

13.78350

0.4913

11.81300

6.89175

3.3585

3.981014.21107

9.56243

1.7745 Disconnected Position

Withdrawn Position

Cell (Insulation Not Required)

14.21361

0.9825

0.3910

4.41112

3.6292

0.9825

3.1580

4.53115

1.8747,5

4.53115

0.47 Dia.Ø12

4.53115 0.63

16

4.53115

4.53115

1.8747,5

0.5 Dia.Ø12,7

4.53115

16.73425

2.7570

2.1755

(4) MountingHoles0.44 Dia. / Ø11

21.65550

21.89556

3.1580 3.23

82

5.98152

17.32440 Min.

0.6918

125

1.6542

0.4913

13.78350

0.4913

11.81300

6.89175

3.3585

3.981014.21107

9.56243

1.7745 Disconnected Position

Withdrawn Position

Cell (Insulation Not Required)

14.21361

0.9825

0.3910

4.41112

3.6292

Circuit Breaker Dimensions

Dimensions: inchmm

Note: Suitable forcontinuous operation at100% rating in aminimum cubicle space17.5 in. (440 mm) h. by21 in. (530 mm) w. by14.25 in. (360 mm) d.Ventilation is notrequired. Refer to shopdrawing #688 378 forverification. Verticalterminals are optionalfor MP08–MP12–MC08circuit breakers.

Note: Suitable forcontinuous operation at100% rating in aminimum cubicle space17.5 in. (440 mm) h. by25.5 in. (645 mm) w. by14.25 in. (360 mm) d.Ventilation is notrequired. Refer to shopdrawing #691 381 forverification. Verticalterminals are optionalfor MP08–MP12–MC08circuit breakers.

11/98©1995 Square D—All Rights Reserved50

Circuit Breaker Dimensions

3-Pole

0631

3121

MP20 Fixed Mounting

0631

3122

0631

3123

4.53115

4.53115

3.3585

0.7920

0.56 Dia.∅14

3.1580

1.5740 Min.

Cell (Insulation Not Required)

4.53115

1.7544,5

3.1580

5.98152

1.69430.12

3

15.78401

5.91150

2.8372

1.18 / 30 Min.2.36 / 60 Max.

2.6868

0.7118

14.98380,5

1.7544,5

Necessary Space for Removing the Arc Chutes

4-Pole

0631

3124

0631

3125

0631

3123

0.7920

4.53115

3.3585

4.53115

0.56 Dia.Ø14,3

4.53115

0.4311

0.4311

20.2515

19.4493

21.8553

(4) MountingHoles0.44 Dia. / Ø11

Dimensions: inchmm

15.75400 16.61

422

0.4311

0.4311

(4) MountingHoles0.44 Dia. / Ø11

14.88378

17.24438

3.1580

1.5740 Min.

Cell (Insulation Not Required)

4.53115

1.7544,5

3.1580

5.98152

1.69430.12

3

15.78401

5.91150

2.8372

1.18 / 30 Min.2.36 / 60 Max.

2.6868

0.7118

14.98380,5

1.7544,5

Necessary Space for Removing the Arc Chutes

Note: Suitable forcontinuous operation at100% rating in aminimum cubicle space17.5 in. (440 mm) h. by21 in. (530 mm) w. by14.25 in. (360 mm) d.Ventilation is notrequired. Refer to shopdrawing #688 379 forverification.

Note: Suitable forcontinuous operation at100% rating in aminimum cubicle space17.5 in. (440 mm) h. by25.5 in. (645 mm) w. by14.25 in. (360 mm) d.Ventilation is notrequired. Refer to shopdrawing #691 379 forverification.

51©1995 Square D—All Rights Reserved11/98

3-Pole Note: Suitable forcontinuous operation at100% rating in aminimum cubicle space17.5 in. (440 mm) h. by21 in. (530 mm) w. by14.25 in. (360 mm) d.Ventilation is notrequired. Refer to shopdrawing #688 379 forverification.

0631

3127

0631

3128

0631

3129

4.53115

4.53115

1.8748

0.7920

0.56 Dia.∅14

17.14435

2.1755

2.1755

12.8325

(4) MountingHoles0.44 Dia./∅11

6.89175

3.3585

3.98101

9.56243

1.7745 Disconnected Position

Withdrawn Position

14.21361

0.718

1.7545

5.98152

3.1580

17.32440 Min.

Cell (Insulation Not Required)

3.2382

1.7545

1.6542

17.64448

4.53115

4.21107

MP20–MC20 Drawout Mounting

4-Pole

0631

3130

0631

3131

0631

3129

0.56 Dia.Ø14,3

0.7920

4.53115

1.8747,5

4.53115

4.53115

16.73425

2.7570

2.1755

(4) MountingHoles0.44 Dia. / Ø11

21.65550

21.89556

Dimensions: inchmm

Circuit Breaker Dimensions

6.89175

3.3585

3.98101

9.56243

1.7745 Disconnected Position

Withdrawn Position

14.21361

0.718

1.7545

5.98152

3.1580

17.32440 Min.

Cell (Insulation Not Required)

3.2382

1.7545

1.6542

17.64448

4.53115

4.21107

Note: Suitable forcontinuous operation at100% rating in aminimum cubicle space17.5 in. (440 mm) h. by25.5 in. (645 mm) w. by14.25 in. (360 mm) d.Ventilation is notrequired. Refer to shopdrawing #691 382 forverification.

11/98©1995 Square D—All Rights Reserved52

Circuit Breaker Dimensions

4-Pole

0631

3136

0631

3137

0631

3138

3-Pole Note: Suitable forcontinuous operation at100% rating in aminimum cubicle space26 in. (660 mm) h. by21 in. (530 mm) w. by14.25 in. (360 mm) d.with a ventilation of 30sq. in. (200 cm2) at topand bottom. Refer toshop drawing #688 380for verification.

0631

3133

0631

3134

0631

3138

5.85149

5.85149

2.0151

0.56 Dia.∅14

0.256

0.256

1.7544,5

4.72120

10.24260

2.2457

15.78401

3.1580 Cell (Insulation Not Required)

5.91150

2.8372

13.95354,5

2.6868

1.7544,5

1.1329

0.246

1.5740 Min.

2.2858

Necessary Space for Removing the Arc Chutes

0.256,35

0.256,35

0.56 Dia.Ø14,3

2.0151

5.85149

4.55115

5.85149

0.4311

0.4311

20.2515

19.4493

21.8553

(4) MountingHoles0.44 Dia. / Ø11

1.7544,5

4.72120

10.24260

2.2457

15.78401

3.1580 Cell (Insulation Not Required)

5.91150

2.8372

13.95354,5

2.6868

1.7544,5

1.1329

0.246

1.5740 Min.

2.2858

Necessary Space for Removing the Arc Chutes

MP25–MP30 Fixed Mounting

Dimensions: inchmm

14.88378

17.24438

15.75400 16.61

422

0.4311

0.4311

(4) MountingHoles0.44 Dia. / Ø11

Note: Suitable forcontinuous operation at100% rating in aminimum cubicle space26 in. (660 mm) h. by25.5 in. (645 mm) w. by14.25 in. (360 mm) d.with a ventilation of 30sq. in. (200 cm2) at topand bottom. Refer toshop drawing #691 380for verification.

53©1995 Square D—All Rights Reserved11/98

MP25–MP30 Drawout Mounting

4-Pole

0631

3142

0631

3143

0631

3144

3-Pole

0631

3139

0631

3140

0631

3144

5.75146

5.75146

0.6517

0.56 Dia.∅14

0.256

0.256

17.14435

2.1755

2.1755

12.8325

(4) MountingHoles0.44 Dia./∅11

2.2858

6.89175

3.98101

9.56243

1.7745 Disconnected Position

Withdrawn Position

14.21361

17.32440 Min.

Cell (Insulation Not Required)

17.64448

4.21107

1.7544

10.24260

4.72120

1.3033 0.71

181.75

45

1.1429

3.3585

0.256,35

0.256,35

0.56 Dia.Ø14,3

0.6517

5.75146

4.92125

5.35136

0.256,35

0.6516,5

16.73425

2.7570

2.1755

(4) MountingHoles0.44 Dia./ Ø11

21.65550

21.89556

Circuit Breaker Dimensions

Dimensions: inchmm

2.2858

6.89175

3.98101

9.56243

1.7745 Disconnected Position

Withdrawn Position

14.21361

17.32440 Min.

Cell (Insulation Not Required)

17.64448

4.21107

1.7544

10.24260

4.72120

1.3033 0.71

181.75

45

1.1429

3.3585

Note: Suitable forcontinuous operation at100% rating in aminimum cubicle space26 in. (660 mm) h. by21 in. (530 mm) w. by14.25 in. (360 mm) d.with a ventilation of 30sq. in. (200 cm2) at topand bottom. Refer toshop drawing #688 380for verification.

Note: Suitable forcontinuous operation at100% rating in aminimum cubicle space26 in. (660 mm) h. by25.5 in. (645 mm) w. by14.25 in. (360 mm) d.with a ventilation of 30sq. in. (200 cm2) at topand bottom. Refer toshop drawing #691 380for verification.

11/98©1995 Square D—All Rights Reserved54

Circuit Breaker Dimensions

Note: Suitable forcontinuous operation at100% rating in aminimum cubicle space22 in. (560 mm) h. by25.25 in. (640 mm) w.by 14.25 in. (360 mm)d. with a ventilation of30 sq. in. (200 cm2) atbottom. Refer to shopdrawing #689 074 forverification.

0631

3145

0631

3146

0631

3147

6.10155

2.5565

0.53 Dia.∅14

0.256

0.256

6.10155

21.65550

2.7570

2.1755

16.73425

(4) MountingHoles0.44 Dia./∅11

3-Pole

MC32 Drawout Mounting

Dimensions: inchmm

2.2858

6.89175

3.98101

9.56243

1.7745 Disconnected Position

Withdrawn Position

14.21361

17.32440 Min.

Cell (Insulation Not Required)

17.64448

4.21107

1.7544

10.24260

4.72120

1.3033 0.71

181.75

45

1.1429

3.3585

55©1995 Square D—All Rights Reserved11/98

1.1429

0.256,35

0.513

1.1429

5.59142

9.76248

9.76248

0.256,35

3-Pole

0631

3148

0631

3151

0631

3152

0631

3149

0631

3150

9.76248

9.76248

5.59142

1.1429

0.513

0.256

1.1429

0.56 Dia.∅14

Necessary Space for Removing the Arc Chutes

Cell (Insulation Not Required)

1.5740 Min.

15.78401

10.24260

1.7544,5

4.72120

2.2858

2.2457

1.1329

1.7544,5

14.35364,5

2.6868

5.91150

2.8372

1.18 / 30 Min.2.36 / 60 Max.

0.246

32.24819

29.88759

30.71780

31.57802

0.4311

0.4311

(4) MountingHoles0.44 Dia. / Ø11

1.1429

0.256,35

0.7820

1.1429

5.59142

9.76248

9.76248

MP40–MP50 Fixed Mounting

MP40

MP50

Circuit Breaker Dimensions

Dimensions: inchmm

Note: Suitable forcontinuous operation at100% rating in aminimum cubicle space26 in. (660 mm) h. by34 in. (870 mm) w. by14.25 in. (360 mm) d.with a ventilation of 30sq. in. (200 cm2) both attop and bottom. Refer toshop drawing #688 381for verification.

11/98©1995 Square D—All Rights Reserved56

Circuit Breaker Dimensions

Note: Suitable forcontinuous operation at100% rating in aminimum cubicle space26 in. (660 mm) h. by34 in. (870 mm) w. by14.25 in. (360 mm) d.with a ventilation of 30sq. in. (200 cm2) both attop and bottom. Refer toshop drawing #688 381for verification.

0631

3153

0631

3156

0631

3157

0631

31541.26

32

0.256

0.56 Dia.∅14

0.256

3.94100

9.94253

9.94253

(6) MountingHoles0.44 Dia./∅11

2.1755

2.3660

13.78350

32.08815

13.78350

2.2858

6.89175

Disconnected Position

19.1485 Min.

17.64448

10.24260

3.0878

3.3585

1.7545 1.14

29

1.7545

9.56243

4.72120

1.0627

3.981014.21107

Withdrawn Position

Cell (Insulation Not Required)

14.21361

1.7745 0.56 Dia.

∅14

0631

3155

9.94253

9.94253

3.94100

0.256

1.2632

0.256

0.56 Dia.∅14

9.94253

9.94253

3.94100 0.25

60.25

6

0.56 Dia.∅14

1.2632

MP40–MP50–MC50–MC50 Drawout Mounting

3-Pole MP40–MC50

MP50–MC50

Dimensions: inchmm

57©1995 Square D—All Rights Reserved11/98

4-Pole (Not UL Listed)

MP40–MP50 Drawout Mounting

MP40

MP50

0631

3158

0631

3161

0631

3162

0631

3159

0631

3160

0.256,35

0.256,35

9.94252,5

0.56 Dia.Ø14,3

1.2632

3.94100

9.94252,5

9.94252,5

0.256,35

0.256,35

9.94252,5

0.56 Dia.Ø14,3

1.2632

3.94100

9.94252,5

9.94252,5

0.256,35

0.256,35

9.94252,5

0.56 Dia.Ø14,3

1.2632

3.94100

9.94252,5

9.94252,5

2.2858

6.89175

Disconnected Position

19.1485 Min.

17.64448

10.24260

3.0878

3.3585

1.7545 1.14

29

1.7545

9.56243

4.72120

1.0627

3.981014.21107

Withdrawn Position

Cell (Insulation Not Required)

14.21361

1.7745 0.56 Dia.

∅14

41.381051

41.141045

1.5740

18.70475

2.3660

(6) MountingHoles0.44 Dia. / Ø11

18.70475

Circuit Breaker Dimensions

Dimensions: inchmm

Note: Refer to shopdrawing #691 384 forverification.

11/98©1995 Square D—All Rights Reserved58

Circuit Breaker Dimensions

MP63 Drawout Mounting (Not UL Listed)

3-Pole

0631

3163

0631

3164

0631

3165

2.0051 0.56 Dia.

∅14

0.256 0.25

6

13.78350

4.62118

13.78350

(6) MountingHoles0.44 Dia./∅11

2.1655

18.70475

1.5740

18.70475

41.141045

6.89175

1.7745 Disconnected Position

14.21361

19.1485 Min.

Cell (Insulation Not Required)

17.64448

10.24260

3.0878

3.3585

1.75

451.1429

2.2858

1.7545

9.56243

Withdrawn Position

4.72120

1.0627

3.981014.21107

Dimensions: inchmm

Note: Refer to shopdrawing #688 382 forverification.

59©1995 Square D—All Rights Reserved11/98

Circuit Breaker Dimensions

Dimensions: inchmm

0631

3174

Mechanical Interlocks for Drawout or Fixed Circuit Breakers

Fixed Mounting

0631

3175

Connecting Links for Two Stack-mounted Circuit Breakers

Drawout Mounting

1.1730

2.03521.57

404.9125

1.9650

6153

6.39163

(*)

2.5465

6.5166

1.7645

35.29900Max.

(*)

3.2182

35.29900Max.

Circuit Breaker Basisfor Rating:MP08 to MP30 (4-Pole),MC08 to MC32

Circuit Breaker Basisfor Rating:MP40 (3-Pole) to MP63,MC40 (3-Pole)

1.9650

Circuit Breaker Basis

35.29900Max.

1.1730

7.05180

1.17 / 2.3530 Min./ 60 Max.

6.86175

4.11105

1.1730

0.5414

(*)

1.7244

0.195

4.9125

(*)

11/98©1995 Square D—All Rights Reserved60

Circuit Breaker Dimensions06

3131

76

Connecting Links for Three Stack-mounted Circuit Breakers

0631

3177

Drawout Mounting Fixed Mounting

Mechanical Interlocks for Drawout or Fixed Circuit Breakers

0631

3178

Cables for Two Side-by-Side Circuit Breakers

Mounted on Rails Mounted on Backplate Dimensions:

(Except as otherwiseindicated)

inchmm

6.56 ft.2 m Max.

7.87200 Min.

r= 4.72r= 120 Min.

r= 4.72r= 120 Min.

7.05180

1.5740

1.9650

Circuit Breaker Basis for Ratings:MP08 to MP30 (4-Pole), MC08 to MC32

Circuit Breaker Basis for Ratings:MP40 (3-Pole) to MP63, MC40 (3-Pole)

1.7645

35.29900Max.

7.05180

1.5740

50

1.9650

(*)

2.5465

6.5166

2.3560

2.0352

2.3560

2.0352

2.3560

35.29900Max.

35.29900Max.

1.9650

2.3560

0.5414

(*)

2.4362

7.05180

0.195

7.05180

0.195

1.9650

7.05180

1.17 / 2.3530 Min. / 60 Max.

6.86175

(*)4.11105

1.1730

2.3560

0.5414

CircuitBreakerBasis

35.29900Max.

35.29900Max.

61©1995 Square D—All Rights Reserved11/98

Dimensions: inchmm

Circuit Breaker Dimensions

4.13105

1.9750

6.50165

2.8071

6.89175

4.92125

2 Ø.202 Ø5

3.94100

3.94100

5.47139

N°1 N°2

N°1

N°2

960019200

0

8

43

2 1

CD

EF

5

6 7

B

A9

0

8

43

2 1

CD

EF

5

6 7

B

A9

OK

error

com

error

com

24V

BBus JBus

7.60193

4 Ø.204 Ø5

1.9750

4.92125

DC150 Data Concentrator

SC150 Indication and Control Interface

0631

3179

0631

3180

11/98©1995 Square D—All Rights Reserved62

Routine Maintenance Guidelines

Recommended Inspection Intervals

MASTERPACT circuit breakers are designed to be maintenance free (see page 64). However, allequipment with moving parts requires periodic inspection to ensure optimum performance andreliability. It is recommended that the circuit breakers be routinely inspected six months afterinstallation, followed by an annual inspection. Intervals can vary depending on particular use andexperience.

Inspection of Circuit Breaker Terminals

n Inspect terminals; if there is discoloration due to overheating, the joint should be disassembledand the surface cleaned before reinstallation. It is essential that electrical connections are madecarefully in order to prevent overheating.

n Check for terminal tightness.

Inspection of Main Contacts

The arc chutes are easily removed to allow access to the main contacts and to the wear indicator.The wear indicator consists of a groove located within the contacts support (see page 3). When thecircuit breaker is closed, this groove is entirely covered up by the moving contacts. Over time, thewear of the contacts will make the groove appear. When the groove is fully visible, replace thebreaker or have an authorized service center change the contacts.

Inspection of Clusters

Totally maintenance free, they have to be replaced only after overheating due to a defectiveconnection or after a major fault. Inspection is advised when checking the terminal connections.

Cleaning

Remove any dust and dirt that may have accumulated on the circuit breaker surface and terminals.

Mechanical Checks

For long periods circuit breakers may not be required to operate on overload or short-circuitconditions. Therefore it is essential to operate the circuit breaker periodically to avoid mechanicalgumming.

Appendix

HAZARD OF ELECTRICAL SHOCK, BURNOR EXPLOSION.

Turn OFF all power supplying the equipmentbefore installing or removing circuit breaker.

Failure to observe these precautions willcause death, personal injury or electricalshock.

DANGER

HAZARD OF EQUIPMENT DAMAGE.

Since circuit breakers contain factory-sealedand calibrated elements. Do not break seal. Incase of malfunction, repairs must be made ata Square D factory or by an authorizedcompany representative.

Failure to observe this precaution cancause equipment damage.

CAUTION

63©1995 Square D—All Rights Reserved11/98

Appendix

Insulation Resistance Tests

When circuit breakers are subjected to severe operating conditions, an insulation resistance testmay be performed as indicated in NEMA standard publication No. AB4-1991. An insulationresistance test is used to determine the quality of the insulation between phases and phase-to-ground. The resistance test is made at a dc voltage higher than the rated voltage to determine theactual resistance of the insulation. The most common method employs a "megger" type instrument.A 1000-volt instrument will provide a more reliable test because it is capable of detecting tracking oninsulated surfaces. Investigate resistance values below 1 megohm. The insulation test shall bemade:n Between line and load terminals of individual poles with the circuit breaker contacts openn Between adjacent poles and from poles to the metallic supporting structure with the circuit

breaker contacts closedThis test may be made with the circuit breaker in place after the line and load conductors have beenremoved, or with the circuit breaker bolted to a metallic base which simulates the in-servicemounting.

Electrical Tests

These tests require equipment for pole resistance measurement and for overcurrent andinstantaneous tripping in accordance with NEMA Standard publication No. AB4. They are not withinthe scope of normal field operation.

11/98©1995 Square D—All Rights Reserved64

Appendix

Endurances

A–Endurance Without Maintenance

MASTERPACT 08 12 16 20 25 30 - 32 40 50 63MP or MC

Mechanical 12,500 10,000 10,000 10,000 10,000 10,000 5,000 5,000 5,000

Electrical 480 Vac 10,000 10,000 10,000 9,000 8,000 4,000 3,000 3,000 2,000

600 Vac 10,000 10,000 10,000 7,000 6,000 2,600 2,500 2,500 1,500

B–Endurance With Service Maintenance

Electrical (480 Vac) or Mechanical

20,000 20,000 20,000 15,000 15,000 15,000 10,000 10,000 10,000

C–Endurance Required by Standards

Frame size 800 1200 1600 2000 2500 3000 4000 5000 6300

UL489 Mechanical 3,500 2,000 2,000 2,000 2,000 1,500 1,500 1,500 1,500

Electrical 500 500 500 500 500 400 400 400 400

ANSI Mechanical 12,500 NS 4,000 4,000 NS 1,500 1,500 NS NS

Electrical 2,800 NS 800 800 NS 400 400 NS NS

Important Notice:

All endurances given are based on normal operating conditions and conventional tests:n Closing and opening operations at rated currentn Power factor: 0.75–0.80As actual conditions differ, use these values only as inspection guidelines and periodically checkcontact wear.

Under normal operating conditions of use, as determined by UL 489 or ANSI Standards (see tableC) and controlled by tests, MASTERPACT circuit breakers do not require maintenance. However,these circuit breakers exceed, without maintenance and additional costs, the endurances requiredby standards. See tables A and C. Service maintenance by a field service representative will extendthe endurance according to table B. This service can be performed on site and consists in changingcontacts, arc chutes and some other parts.

Example:MP16 at 480 V requires no maintenance before 10,000 cycles (mechanical or electrical). Endurancemay be increased after servicing at 10,000 operations.

65©1995 Square D—All Rights Reserved11/98

Appendix

IEC 947-2 Interrupting Ratings

In addition to UL 489 and ANSI C37-13, MASTERPACT circuit breakers comply with the IEC 947-2Standard as per the table below. For further information, contact a sales representative.

Type Ampere Interrupting Ratings3-Pole Rating (A) UL489 IEC 947-2

RMS Symmetrical Amps480 Vac 600 Vac Short-time 440 Vac 690 Vac

Icu Ics Icu Ics

Standard Interrupting Rating

MP08 H1 800 65 kA 65 kA 50 kA 65 kA 65 kA 65 kA 65 kA

MP12 H1 1200 65 kA 65 kA 50 kA 65 kA 65 kA 65 kA 65 kA

MP16 H1 1600 65 kA 65 kA 50 kA 65 kA 65 kA 65 kA 65 kA

MP20 H1 2000 75 kA 75 kA 75 kA 75 kA 75 kA 75 kA 75 kA

MP25 H1 2500 75 kA 75 kA 75 kA 75 kA 75 kA 75 kA 75 kA

MP30 H1 3000 75 kA 75 kA 75 kA 75 kA 75 kA 75 kA 75 kA

MP40 H1 4000 100 kA 100 kA 100 kA 100 kA 100 kA 85 kA 85 kA

MP50 H1 5000 100 kA 100 kA 100 kA 100 kA 100 kA 85 kA 85 kA

MP63 H1 6300 (1) 100 kA 100 kA 100 kA 100 kA 100 kA 85 kA 85 kA

High Interrupting Rating

MP08 H2 800 100 kA 65 kA 50 kA 100 kA 100 kA 85 kA 85 kA

MP12 H2 1200 100 kA 65 kA 50 kA 100 kA 100 kA 85 kA 85 kA

MP16 H2 1600 100 kA 65 kA 50 kA 100 kA 100 kA 85 kA 85 k A

MP20 H2 2000 100 kA 75 kA 75 kA 100 kA 100 kA 85 kA 85 kA

MP25 H2 2500 100 kA 75 kA 75 kA 100 kA 100 kA 85 kA 85 kA

MP30 H2 3000 100 kA 75 kA 75 kA 100 kA 100 kA 85 kA 85 kA

MP40 H2 4000 125 kA 100 kA 100 kA 150 kA 125 kA 85 kA 85 kA

MP50 H2 5000 125 kA 100 kA 100 kA 150 kA 125 kA 85 kA 85 kA

MP63 H2 6300 (1) 150 kA 100 kA 100 kA 150 kA 125 kA 85 kA 85 kA

(1) Not UL Listed.

11/98©1995 Square D—All Rights Reserved66

IEC 947-2 Ratings

Auxiliary and Position SwitchesVoltage (V) Auxiliary Switch Overcurrent Ready to Position

Trip Switch Close Switch SwitchesOF O OFSUP SDE PF CE/CD/CT

50/60 Hz 110 15

240 10 10 10 10 10 10

380 10 6 6 5 5 6

480 10 6 6 6

600 6 3 3 3

DC 48 5 3 3 3 3 3

125 3 0.5 0.5 0.3 0.3 0.5

250 3 0.25 0.25 0.15 0.15 0.25

500 0.5

OF: Heavy Duty O: Standard OFSUP: 24 Additional CE: Connected CD: Disconnected CT: Test

Spring Charging MotorRated Voltage (V)

UL 489 Listed IEC 947-2

60 Hz 120 50/60 Hz 100-127

240 200-240

DC 24 DC 24-30

48 48-60

125 100-125

Closing CoilRated Voltage (V)

UL 489 Listed IEC 947-2

60 Hz 120 50/60 Hz 110-127

240 220-250

DC 24 DC 24

48 48

125 125

250 250

Shunt TripRated Voltage (V)

UL 489 Listed IEC 947-2

60 Hz 120 50/60 Hz 110-127

240 220-250

480 440-480

DC 24 DC 24

48 48

125 125

250 250

Undervoltage TripRated Voltage (V)

UL 489 Listed IEC 947-2

60 Hz 120 50/60 Hz 110-127

240 220-250

480 440-480

DC 24 DC 24

48 48

125 125

250 250

Appendix

67©1995 Square D—All Rights Reserved11/98

Notes

11/98©1995 Square D—All Rights Reserved68

Notes

69©1995 Square D—All Rights Reserved11/98

Notes

11/98©1995 Square D—All Rights Reserved70

Notes

71©1995 Square D—All Rights Reserved11/98

Notes

11/98©1995 Square D—All Rights Reserved72

Notes

Square D CompanyPO Box 3069, 3700 Sixth St SWCedar Rapids, IA 52406-3069 USAField Services: 1-800-634-2003www.squared.com

POWERLOGIC, Square D and are registered trademarks of Square D Company.MASTERPACT, COMPACT and MULTI 9 are registered trademarks of Schneider Electric.DIGIPACT is a registered trademark of Merlin Gerin. MODBUS is a registered trademark ofSchneider Automation. All other trademarks are the intellectual property of their respectivecompanies.0631CT9501R11/98—November 98—Printed in USA—© 1998 Square D—All Rights Reserved