UA Controller Merlin Gerin

Merlin Gerin36

Masterpact: functions and characteristics

automatic source-changeover systems

Masterpact source-changeover systems canbe used to implement various configurationsinvolving several incoming feeders. The twoor three Masterpact circuit breakers orswitch-disconnectors used are mechanicallyinterlocked to prevent certain combinationsof operations.All types of Masterpact devices may be fitted(fixed and drawout versions, three-pole andfour-pole, different ratings).The devices may be arranged:c vertically, i.e. stack-mounted andinterconnected by a set of rods;c horizontally (two only), i.e. side-by-sideand interconnected by a set of cables.An electrical interlock must be used whenthe source changeover is part of anautomatic system.

E33

079

E33

078

R

N

N

R

auto

stop

manu

UN

ON / I

OFF / O

fault

UR

ON / I

OFF / O

fault

UN = O

UN = 1

MERLIN GERIN

STOP generator

N

R

test

BU

S

Test

MERLIN GERIN

multi 9

P25M

660V

AC3-IEC292-1

0 . OFF

Test

MERLIN GERIN

multi 9

P25M

660V

AC3-IEC292-1

0 . OFF

4

5

6

R

N

N

0,5s

R

0,5s

UN

ON / I

OFF / O

fault

UR

ON / I

OFF / O

fault

UN = O

UN = 1

MERLIN GERIN

stop

manu

N

test

R

E33

082

automatic source-changeover system with 2 devices

1

2

3

3

1 2

3

with controller In this case, conditional changeoversbetween the «Normal» and «Replacement»sources are initiated by a Merlin Gerincontroller.

A Masterpact automatic source-changeover system with 2 devices ismade up of:1 - circuit breaker QN connected to the

"Normal" source;2 - circuit breaker QR connected to the

"Replacement" source;3 - mechanical interlocking system by rods

or cables;

automatic control of the system can beprovided by adding:4 - electrical interlocking unit IVE;5 - auxiliaries control plate ACP;6 - controller BA or UA.

Each Masterpact circuit breaker isequipped with:c a motor mechanism;c a shunt release (MX);c a «ready to close» contact (PF);c a block of 4 changeover switches (OF);c an additional terminal block (BS) and ablock of 4 «connected» position switches(CE) for source-changeover systems madeup of drawout breakers.

without controller In this case, the automatic control system toinitiate changeovers between the «Normal»and «Replacement» sources underpredefined conditions must be provided bythe customer.Note that we can provide diagrams for thedesign of various automatic control systemsfor different sources.

Masterpact automatic source-changeover system

Controller

0251

86

0530

61

0530

60

0530

58

37Merlin Gerin

E33

080

1

1

2

3

3

3

automatic source-changeover system with 3 devicesA Masterpact automatic source-changeover system with 3 devices ismade up of:1 - 2 circuit breakers QN1 and QN2

connected to the "Normal" source;2 - circuit breaker QR connected to the

"Replacement" source;3 - mechanical interlocking system by rods;

for such applications (consult us)automatic control of the system can beprovided by adding:4 - 2 electrical interlocking unit IVE;5 - auxiliaries control plate ACP;6 - controller BA or UA.

Each Masterpact circuit breaker isequipped with:c a motor mechanism;c a shunt release (MX);c a "ready to close" contact (PF);c a block of 4 changeover switches (OF);c an additional terminal block (BS) and ablock of 4 "connected" position switches(CE) for source-changeover systems madeup of drawout breakers.

without controller In this case, the automatic control system toinitiate changeovers between the «Normal»and «Replacement» sources underpredefined conditions must be provided bythe customer.Note that we can provide diagrams for thedesign of various automatic control systemsfor different sources.

with controller (consult us)

E33

383

R

N

N

R

auto

stop

manu

UN

ON / I

OFF / O

fault

UR

ON / I

OFF / O

fault

UN = O

UN = 1

MERLIN GERIN

STOP generator

N

R

test

BU

S

Test

MERLIN GERIN

multi 9

P25M

660V

AC3-IEC292-1

0 . OFF

Test

MERLIN GERIN

multi 9

P25M

660V

AC3-IEC292-1

0 . OFF

4

5

6

R

N

N

0,5s

R

0,5s

UN

ON / I

OFF / O

fault

UR

ON / I

OFF / O

fault

UN = O

UN = 1

MERLIN GERIN

stop

manu

N

test

R

In this case, conditional changeoversbetween the "Normal" and "Replacement"sources are initiated by a Merlin Gerincontroller.

Merlin Gerin38


automatic source-changeover systems (cont.)

mechanical interlock selection

0251

8402

5186

mechanical interlocking byconnecting rods for 2 or 3stack-mounted breakersThis involves:c 2 or 3 Masterpact circuit breakers and/orswitch-disconnectors;c an adaptation fixture on the right side ofeach breaker;c 1 or 2 sets of connecting rods with no-slipadjustments;The various parts are mounted by the user.The changeover system with interlocking byconnecting rods is also available in a versionwhich is factory mounted on a steel frame.

Maximum distance between fixingplanes: 900 mm.

mechanical interlocking bycables for 2 side-by-sidebreakersThis involves:c 2 Masterpact circuit breakers and/orswitch-disconnectors;c an adaptation fixture on the right side ofeach breaker;c a set of cables with no-slip adjustments;The various parts are mounted by the user.

Distance between fixing planes:c maximum: 2 000 mm;c minimum: breaker height with arc chutecover (see pages ????).

device combinationsAll combinations are possible: fixed anddrawout versions, three-pole and four-pole,different ratings, circuit breakers or switch-disconnectors.All control units can be used on the circuitbreakers.

assembly and installationThe various parts of the Masterpactautomatic source-changeover system aremounted and connected by the user. Nocircuit breaker modifications are required.The wiring diagrams are shown on pages??? to ???.The Masterpact automatic source-changeover system may also be suppliedfactory-wired and mounted on a metalframe.

39Merlin Gerin

power circuit possible combinations configuration type cat. No.

interlocking with 3 breakers3 sources, only one breaker closed

interlocking with 3 breakers2 sources + 1 coupling

E30

737

E30

738

E30

739

electrical interlocking 685363automatic controlwith generator set 688784with permanent "Replacement" 688942source

interlocking with 2 breakers Q1 Q20 00 11 0

E30

736

Q1 Q2

Q1 Q2 Q3

Q1 Q2 Q3



automatic control: typical configurations

The electrical interlocking system andautomatic control system for multiplesources must be wired by the user. It mustbe used in conjunction with the mechanicalinterlocking system.Typical wiring configurations are availableon request. See examples below. For otherconfigurations, consult us.

Necessary auxiliaries and accessoriesTo implement the configurations below, eachMasterpact circuit breaker must be equippedwith:

c a motor mechanism (MCH);c a shunt release (MX);c a "ready to close" contact (PF);c a block of 4 changeover switches (OF);c an additional terminal block (BS) and ablock of 4 "connected" position switches(CE) for changeover systems includingdrawout breakers.

Option with "lockout after fault"With this option, the circuit breaker must bereset manually after a fault trip.

interlocking with 3 breakers2 "Normal" sources + 1 "Replacement"source

Q1 Q2 Q3

Q1 Q2 Q30 0 01 0 00 0 11 1 00 1 0

automatic control with permanent"Replacement" sourcewith lockout after fault 685366without lockout after fault 688183automatic control with generator setwith lockout after fault 689642without lockout after fault 689644

electrical interlockingwith lockout after fault 688188without lockout after fault 688187

Q1 Q2 Q30 0 01 0 00 1 00 0 1

Q1 Q2 Q30 0 01 0 00 1 00 0 11 1 00 1 11 0 1

electrical interlockingwith lockout after fault 688189without lockout after fault 688190automatic control 689651

40 Merlin Gerin



controller option selection

Used together with the auxiliaries controlplate ACP, controllers BA and UA initiate theautomatic changeover operations accordingto the status of the "Normal" and"Replacement" sources.

E32

704

E32

705

E32

703

InstallationTwo possibilities:c mounted directly on the auxiliaries controlplate ACP.

c mounted on the front of the switchboard.The distance between the controller and theauxiliaries control plate must not exceed2 metres. The interconnection wiring mustbe done by the customer.

terminal block and electrical interlocking unit: IVE

R

N

N

R

auto

stop

manu

UN

ON / I

OFF / O

fault

UR

ON / I

OFF / O

fault

UN = O

UN = 1

MERLIN GERIN

STOP generator

N

R

test

BU

S

Test

MERLIN GERIN

multi 9

P25M

660V

AC3-IEC292-1

0 . OFF

Test

MERLIN GERIN

multi 9

P25M

660V

AC3-IEC292-1

0 . OFF

customerconnection

Test

MERLIN GERIN

multi 9

P25M

660V

AC3-IEC292-1

0 . OFF

Test

MERLIN GERIN

multi 9

P25M

660V

AC3-IEC292-1

0 . OFF

R

N

N

R

auto

stop

manu

UN

ON / I

OFF / O

fault

UR

ON / I

OFF / O

fault

UN = O

UN = 1

MERLIN GERIN

STOP generator

N

R

test

BU

S

The terminal block and electrical interlockingunit IVE is used to connect the operatingmechanism.

Control voltage:c 48 to 415 V, 50/60 Hz - 440 V 60 Hz.The IVE control voltage must be the sameas the motor mechanism voltage.

auxiliaries control plate: ACPThe auxiliaries control plate ACP includes:c two P25M circuit breakers supplying andprotecting the automatic control circuits forthe "Normal" and "Replacement" sources.These circuit breakers have an infinitebreaking capacity;c two relay contactors for the BA or UAcontroller;c the terminal block for connection to thecontroller.

Power supply:Power is supplied by the "Normal" and"Replacement" sources. The controlvoltage for the auxiliaries control plate mustbe the same as for the IVE unit and themotor mechanisms.

Control voltagesc 220 to 240 V 50/60 Hz;c 380 to 415 V 50/60 Hz - 440 V 60 Hz.

Installation:The auxiliaries control plate ACP must bewired to the IVE unit by the customer.

0530

60

Merlin Gerin 41

Controller UA

controller

controller BA UAcompatible circuit breakers All Masterpact circuit breakers

4-position switchautomatic operation c cforced operation on "Normal" source c cforced operation on "Replacement" source c cstop (both "Normal" and "Replacement" sources off) c cautomatic operationmonitoring of the "Normal" source and automatic changeover c cgenerator set control cload shedding and reconnection of non-priority circuits cchangeover to the "Replacement" source if one of the phases of the"Normal" phase is absent ctestby opening the P25M circuit breaker supplying the controller cby pressing the test button on the front of the controller cindicationscircuit breaker status indication on the front of the controller: on, off,fault trip, automatic mode indicating contact c cautomatic mode indicating contract c cother functionsvoluntary transfer to "Replacement" source (e.g. energy management commands) c c"Replacement" source voltage contact: additional test of UR (not carried out bythe controller). Transfer to "Replacement" source only if test is positive c cselection of type of "Normal" source (single-phase or three-phase) cduring peak-tariff periods (energy management commands), forced operationon "Normal" if "Replacement" source not operational csetting of maximum startup time for the replacement source cpower supplycontrol voltages (1) 220 to 240 V 50/60 Hz

380 to 415 V 50/60 Hz - 440 V 60 Hz

optionscommunication option c

(1) The same voltage must be used for the ACP plate, the IVE unit and the circuit breaker motor mechanisms. If this voltage is the same as the source voltage, thenthe “Normal” and “Replacement” sources can be used directly for the power supply. If not, a BC type or equivalent isolation transformer must be used.

0530

58

42 Merlin Gerin


automatic source-changeover systemscontroller option selection (cont.)

controller BA Controller BA can be used with Masterpactcircuit breakers to implement a straight-forward automatic source-changeoversystem (switching from one source toanother depending on the presence ofvoltage UN on the "Normal" source).


Electrical characteristicsPower is supplied from the auxiliaries controlplate ACP. The same voltage must be usedto supply the ACP plate, the IVE unit and thecircuit breaker motor mechanisms. If thisvoltage is the same as the source voltage,the "Normal" and "Replacement" sourcescan be used directly for the power supply.If not, a BC type or equivalent isolationtransformer must be used.

Operationc a four-position switch can be used toselect:v automatic operation;v forced operation on source N;v forced operation on source R;v stop (both "Normal" and "Replacement"sources off);c adjustment of time delays in front:v t1 from 0.1 to 30 seconds;v t2 from 0.1 to 240 seconds;c circuit breaker status indication on thefront of the controller: on, off, fault trip;

c integrated terminal block for connection ofthe following signals:v inputs:– order for voluntary transfer to source R(e.g. energy management commands),– "Replacement" source voltage contact:Additional test for UR (not carried out by thecontroller). Transfer to "Replacement"source only if test is positive,v outputs:– indication of operation in automatic mode.Connection to the terminal block: see p.XXX.c controller BA can be tested by openingthe P25M circuit breaker on the N circuit,thus simulating a failure of UN.See detailed transfer steps on page XXX.

MERLIN GERINBA automatism220/240 V 50/60 Hz

N R

fault fault

UN UR

ON/I ON/I

OFF/O OFF/O

N

R

UN = 0

UN = I

4281

0.50.1

1530

3015608

40.1

120240

t1 s

t2s

compact / masterpact

0.5s 0.5s

N R

stopmanu

autoreset

E30

184

Front face of controller BA

Time delay settings:QN: Masterpact circuit breaker with motormechanism on “Normal” source,QR: Masterpact circuit breaker with motormechanism on “Replacement” source,t1: time delay before QN opens when the voltageUN of the “Normal” source disappears,t2: time delay before QR opens when the voltageUN of the “Normal” source is restored.

Merlin Gerin 43

RN

OI

RN

IO

RN

OI

RN

IO

E32

708

"auto"

operat. onsource N

UN fail (duration > t1) or voluntaryswitching order received

t > 0,5 s

QR closed

t > 0,5 s

QN closed

QN opens

QR closes

QR opens

QN closes

E21

108

E27

107

E30

187

4-position switch N et UN présente

QR opens

QN closes

operat. onsource N

QN fermé

4-position switch in "R" position and"UR" present

QN opens

QR closes

QR closed

t > 0,5 s

operat. onsource R

end of reset

"stop"

off QN et QR open

duration a 1 sreset

ccccc 4-position switch in "stop" position

UN present for t > t2 or voluntaryswitching order stopped

action on 4-position switch

t > 0,5 s


ccccc 4-position switch in "R" position(forced operation on "Replacement" source)

operat. onsource R

ccccc 4-position switch in "auto" position(automatic operation)

ccccc 4-position switch in "N " position(forced operation on "Normal" source)

Merlin Gerin44


automatic source-changeover systemscontroller option selection (cont.)

controller UA Controller UA can be used with Masterpactcircuit breakers to implement a source-changeover system offering the followingautomatic functions:c switching from one source to anotherdepending on the presence of voltage UNon the "Normal" source;c control of an engine generating set;c shedding and reconnection of non-prioritycircuits;c switching to the "Replacement" source inthe event of a failure on one of the phases ofthe "Normal" source.

Electrical characteristicsPower is supplied from the auxiliaries controlplate ACP. The same voltage must be usedto supply the ACP plate, the IVE unit and thecircuit breaker motor mechanisms. If thisvoltage is the same as the source voltage,the "Normal" and "Replacement" sourcescan be used directly for the power supply. Ifnot, a BC type or equivalent isolationtransformer must be used.


Operationc a four-position switch can be used toselect:v automatic operation;v forced operation on source N;v forced operation on source R;v stop (circuit breakers open and manualoperation);c adjustment of time delays in front:v t1 from 0.1 to 30 seconds;v t2 from 0.1 to 240 seconds;v t3 from 0.5 to 30 seconds;v t4 from 0.5 to 30 seconds;v t5 from 60 to 600 seconds;c circuit breaker status indication on thefront of the controller: on, off, fault trip;c test button on the front of the controllerto check the transfer from the “Normal”source to the "Replacement" source and thereturn to the "Normal" source;

c integrated terminal block for connection ofthe following signals:v inputs:– order for voluntary transfer to source R(e.g. energy management commands),– "Replacement" source voltage contact:Additional test for UR (not carried out by thecontroller). Transfer to "Replacement"source only if test is positive;v outputs:– control of engine generator set,– load shedding of non-priority circuits,– indication of operation in automatic mode;c 3 switches provide the following functions:v selection of the type of "Normal" source,i.e. single-phase or three-phase;v enable or disable voluntary energymanagement transfer if the "Replacement"source is not operational;v selection of the maximum toleratedstarting time for the engine generator set("Replacement" source): 120 s or 180 s.

Batibus option for controller UAA communication function can be used tocheck the following from a remote location:c status of the circuit breakers (open,closed or fault trip);c voltage presence on the “Normal” and“Replacement” sources;c presence of an order forcing operation onthe “Replacement” source (e.g. for energymanagement purposes);c values of settings and configurations,c status of the non-priority circuits (whethersubject to load shedding or not).

In automatic mode, this communicationsoption also offers the possibility of remoteforced operation on the “Replacement”source.

E30

183

MERLIN GERINUA automatism220/240 V 50/60 Hz

N R

N R

stopmanu

auto

test

reset

fault fault

UN UR

ON/I ON/I

OFF/O OFF/O

N

R

UN = 0

UN = I

STOP generator

4281

0.50.1

1530

105152

10.5

2030

105152

10.5

2030

3015608

40.1

120240

300240360160

12060

480600

t1 s

t3 s

t4s

t2s

t5s

compact / masterpact

Front face of controller UA

Time delay settings:QN: Masterpact circuit breaker with motormechanism on “Normal” source,QR: Masterpact circuit breaker with motormechanism on “Replacement” source,t1: time delay before QN opens when the voltageUN of the “Normal” source disappears,t2: time delay before QR opens when the voltageUN of the “Normal” source is restored,t3: time delay before QR closes once QN hasopened and the load has been shed,t4: time delay before QN closes once QR hasopened and the load has been reconnected,t5: time delay for confirmation of presence of UNbefore stopping the generator set.

0530

59

Merlin Gerin 45

RN

IO

RN

OI

RN

OI

RN

IO

operat. onsource N genset off

genset startup

UN fails (duration > t1) or voluntaryswitching order received

UR present for t > 120 s or 180 s

t > t3

QR closes

QR closed

operat. onsource R genset on

t > t4

QN closes

QN closed

UN present for t > t5 and novoluntary switching order received

genset off

UR absent

4-position switch in "N" and UN

present

t > t4

QN closes

genset off

QN closed

4-position switch in "R" and UN

present

genset startup

UR present for t > 120 s ou 180 s

t > t3

QR closed

QR closes

E30

185

E30

187

E30

186

genset on

"auto"

E27

107

ccccc 4-position switch in "R" position(forced operation on "Replacement" source)

reset

end of reset

"stop"

stop

operat. onsource R

duration a 1 s

QN opens and loadshedding

UN present for t > t2 or voluntaryswitching order stopped

QR opens and loadreconnection

genset remains on

QR opens and loadshedding

operat. onsource N



QN opens and loadshedding

ccccc 4-position switch in "auto" position(automatic operation)

ccccc 4-position switch in "stop" position ccccc 4-position switch in "N" position(forced operation on "Normal" source)

QN and QR open

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UA Controller Merlin Gerin