Gm8 Manual - Elcb

CONTENTS

Chapter 1 Outline of GM8 Series 3

Chapter 2

Improvements through spur with long accumulation 13

Chapter 3 Technology specications 23

Chapter 4 Accessories 63

Chapter 5 Overall and mounting dimensions 75

Chapter 6 Purchase terms and conditions 86

Chapter 1 Outline of GM8 Series

Data table for quick selection of GM8 series moulded case circuit-

breaker 4

Type explanation of GM8 series moulded case circuit-breaker 6

Six types optional release 8

Tripping indication module T1 11

Function indicating diagram of control panel 12

4Chapter 1 Outline of GM8 Series1

BEIJING PEOPLE'S ELECTRIC PLANT CO., LTD.

Type GM8-125 GM8-250 GM8-400 GM8-630 GM8-800

Frame size Inm A 125 250 400 630 800

Rated current InThermomagnetic type A 101620253240506380100125 125140160180200225250 250315350400 400500630 400500630700800

Electronic type Intelligent type A 3216~326332~6312563~125 250125~250 400200~400 630315~630 800400~800

Pole number P 34 34 34 34 34

Rated insulation voltage Ui ACV 800 800 800 800 800

Rated operational voltage Ue ACV 400690 400690 400690 400690 400690

Rated impulse withstand voltage Uimp kV 8 8 8 8 8

Short-time withstand current Icw kA /0.8s 5 7.6 9.6

Utilization category A A AB AB AB

Short-circuit

breaking capacity

Code M H R G M H R G M H R G M H R G M H R G

Rated ultimate short-circuit breaking capacity Icu

AC 400V kA 35 50 70 85 35 50 70 85 35 50 70 100 35 50 70 100 35 50 70 100

AC 690V kA 25 25 25 25 25

Rated service short-circuit breaking capacity Ics

AC 400V kA 35 35 50 70 35 35 50 70 35 50 70 75 35 50 70 75 35 50 70 75

AC 690V kA 10 10 15 15 15

Release type

Thermomagnetic type TM Note

Electromagnetic type X

Electronic type E

Intelligent type(Internal controller Zn

Intelligent type(External controller Zs

Arc distance mm 0 0 0 2 0 2 0

Prospective-maximization

maintenance durability Mechanical/Electrical440VIn/2 time 15000/12000 15000/12000 15000/12000 15000/8000 15000/7500

Test durability Mechanical/Electrical time 8500/6000 7000/3000 4000/2000 4000/1500 2500/1000

Overall dimensions

Wmm 90 105 140 140 210

L mm 174 184 284 284 302

H mm 68 86 68 86 103 103 103

Mounting type Fixed type front : none, rear: B ), plug-in type (C) Fixed type front : none, rear: B ), plug-in type

(C)Fixed type front : none, rear: B ), plug-in type (C)withdrawable

type(C2)Fixed type front : none, rear: B ), plug-in type (C)

withdrawable type(C2)Fixed type front : none, rear: B ), plug-in type (C)

withdrawable type(C2)

Internal accessories

(Cassette accessories)

Auxiliary contact AX

Alarm contact AL

Shunt release SHT

Under-voltage release UVT

External accessories

Power-driven operating device P

Turning handle operating device Z

Connecting bar L

Tripping indication module TI

Mechanical interlocking MI

Note 1 TMNon-adjustable thermomagnetic distribution protection TMF: Non-adjustable thermomagnetic generator protection TMB: Non-adjustable thermomagnetic transformer protection TMD Non-adjustable thermomagnetic motor protection; TMU: Non-adjustable thermomagnetic mine-used circuit-breaker. 2 When the protective cover 9.5mm in height of GM8-125 and GM8-250 is removed, the arc distance50mm; When the protective cover 13.5mm in height of GM8-400 GM8-630 and GM8-800 is removed, the arc distance100mm; All 4P products are short ashover. 3 Only suitable for GM8-Zs intelligent circuit-breaker. 4 means this function is provided means without this function. 5 Ano articial time-delay when a short-circuit occurs; B: articial time-delay when a short-circuit occurs.

Data table for quick selection of GM8 series moulded case circuit-breaker

5Chapter 1 Outline of GM8 Series Chapter 1 Outline of GM8 Series 1


Type GM8-125 GM8-250 GM8-400 GM8-630 GM8-800

Frame size Inm A 125 250 400 630 800

Rated current InThermomagnetic type A 101620253240506380100125 125140160180200225250 250315350400 400500630 400500630700800

Electronic type Intelligent type A 3216~326332~6312563~125 250125~250 400200~400 630315~630 800400~800

Pole number P 34 34 34 34 34

Rated insulation voltage Ui ACV 800 800 800 800 800

Rated operational voltage Ue ACV 400690 400690 400690 400690 400690

Rated impulse withstand voltage Uimp kV 8 8 8 8 8

Short-time withstand current Icw kA /0.8s 5 7.6 9.6

Utilization category A A AB AB AB

Short-circuit

breaking capacity

Code M H R G M H R G M H R G M H R G M H R G


AC 400V kA 35 50 70 85 35 50 70 85 35 50 70 100 35 50 70 100 35 50 70 100

AC 690V kA 25 25 25 25 25


AC 400V kA 35 35 50 70 35 35 50 70 35 50 70 75 35 50 70 75 35 50 70 75

AC 690V kA 10 10 15 15 15

Release type

Thermomagnetic type TM Note

Electromagnetic type X

Electronic type E

Intelligent type(Internal controller Zn

Intelligent type(External controller Zs

Arc distance mm 0 0 0 2 0 2 0

Prospective-maximization

maintenance durability Mechanical/Electrical440VIn/2 time 15000/12000 15000/12000 15000/12000 15000/8000 15000/7500

Test durability Mechanical/Electrical time 8500/6000 7000/3000 4000/2000 4000/1500 2500/1000

Overall dimensions

Wmm 90 105 140 140 210

L mm 174 184 284 284 302

H mm 68 86 68 86 103 103 103

Mounting type Fixed type front : none, rear: B ), plug-in type (C) Fixed type front : none, rear: B ), plug-in type

(C)Fixed type front : none, rear: B ), plug-in type (C)withdrawable

type(C2)Fixed type front : none, rear: B ), plug-in type (C)

withdrawable type(C2)Fixed type front : none, rear: B ), plug-in type (C)

withdrawable type(C2)


(Cassette accessories)

Auxiliary contact AX

Alarm contact AL

Shunt release SHT

Under-voltage release UVT


Power-driven operating device P

Turning handle operating device Z

Connecting bar L

Tripping indication module TI

Mechanical interlocking MI



The 8th series

moulded

case circuit-

breaker of

the brand of

SECURELUCKY

Type explanation of GM8 series moulded case circuit-breaker

Frame size

Inm=125

Inm=250

Inm=400

Inm=630

Inm=800

Short-circuit breaking capacity code

M ypical type 35kANote

H Higher type50kA

R High type70kA

G Highest type85~100kA

Omit Zero ashover

G Short ashover

Connection mode code

Omit Front

B Rear

C Plug-in

C2 Withdrawable Note

GM8 125 H 3 TM G B

Tripping type code

Distribution protection Transformer protection Generator protection Motor protection Mine-used circuit-breaker

TM Thermomagnetic release TMB Thermomagnetic release TMFThermomagnetic

release TMDThermomagnetic

release TMUThermomagnetic

release

E Electronic release MD Electromagnetic release EU Electronic release

Zn Intelligent internal controller ZUn Intelligent internal controller

Zs Intelligent external controller ZUs Intelligent external controller

Tn Communication internal controller XU Electromagnetic release

Ts Communication external controller

X Electromagnetic release

Examples:

GM8-125M/3TM In=80A

Meaning: GM8 series circuit-breaker, frame size is 125A, breaking capacity is 35A, 3P, with thermomagnetic release, rated

current is 80A.

GM8-400H/3Zs SHT+AX TIs In=400A

Meaning: GM8 series circuit-breaker, frame size is 400A, breaking capacity is 50A, 3P , with intelligent internal controller,

auxiliary switch and shunt release, tripping indication module can be optional orded, rated current is 400A.

Note:Eg products can be used for ground protection.

Pole number

3:Three-pole

4A Note:Four-pole

4B:Four-pole

4C:Four-pole

4D:Four-pole



Rated current

P AC230V 230VSHT+ALAX MIL TIs 80AIn=

TIs Tripping indication module of external controller (separated installation) Note

Note: 1 Type Zn, Zs and E without M-type breaking capacity

2 Only suitable for the circuit-breaker which frame size400 A.

3 Only GM8-Zs could equip with optional module.

4 Classication according to the type of neutral pole (pole N):

Type A: Pole N is non-equipped with over-current tripping device, which is making always and do not closing or opening with other

three poles.

Type B: Pole N is non-equipped with over-current tripping device, which always closing or opening with other three poles (contact

rstly and then opening).

Type C: Pole N is equipped with over-current tripping device, which always closing or opening with other three poles (contact rstly

and then opening).

Type D: Pole N is equipped with over-current tripping device, which is making always and do not closing or opening with other three

poles.

Over-current tripping value of pole N needs to be provided by the users.

Operational type Operational voltage

Omit Body Omit

Z Manual Omit

P Motor-driven AC 110V

AC 230V

AC 400V

DC 24V

DC 110V

DC 220V

Internal accessories Operational voltage

AL Alarm switch Omit

AX Auxiliary switch Omit

SHT Shunt release AC230VAC400VDC24VDC110VDC220V

UVT Under-voltage release AC230VAC400V


L Connecting bar


M Mechanical interlocking



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Six types optional release

1Rated current of thermomagnetic release GM8-TM:10~800A

Tripping types Release code Protection function Acting curve

Thermomagnetic type

release

Distribution

protection:TM,M

Transformer

protection:TMB

Generator

protection:TMF

Motor

protection:TMD,MD

Mine-used circuit-

breaker:TMU

Over-load long time-delay

protection

(thermal) ( internal xed )

Short-circuit instantaneous

protection(electromagnetic)

(internal xed )

2Rated current of electromagnetic release GM8-X (distribution protection): 10~800A


Electromagnetic

release

Distribution protection:XMine-used circuit-

breaker:XU

Short-circuit back-upprotection (electromagnetic)

(built-in xed)

3Rated current of electronic release GM8-E (distribution protection): 16~800A


Electronic releaseDistribution protection:E

Mine-used circuit-breaker:EU

Over-load long time-delay protection(electronic)

( adjustable )

Short-circuit short time-delay protection

(electronic)(adjustable with Ii)

Short-circuit instantaneousprotection(electronic)

(adjustable )Short-circuit back-up

protection(electromagnetic) 20Inm20%

PAL pre-alarm(for indication)(adjustable )

t

I

TM

t

I

t Ir

IiTsd

Isd=OFFIsd= Ii12

Tr

I

t

I

M

10

Chapter 1 Outline of GM8 Series1


4Rated current of intelligent release GM8-Zn (distribution protection): 16~800A


Intelligent

release(internal)

Distribution

protection:Zn

Mine-used circuit-

breaker:ZUn

Over-load long time-delay protection(intelligent) (

adjustable )Short-circuit short time-delay

protection (intelligent) ( adjustable )

Short-circuit instantaneousprotection (intelligent) (

adjustable )Short-circuit back-up



5Rated current of GM8-Zs intelligent release(distribution protection): 16~800A


Intelligent

release(internal)

Distribution

protection:Zs

Mine-used circuit-

breaker:ZUs

Over-load long time-delay protection

(intelligent) ( adjustable )Short-circuit short time-delay

protection (intelligent) ( adjustable )

Short-circuit instantaneousprotection (intelligent) (




6Rated current of GM8-Tn/Ts intelligent communicative release: 16~800A


Intelligent

communicative release

Distribution

protection:T

Over-load long time-delay protection

(electronic) ( adjustable )Short-circuit short time-delay

protection (electronic) ( adjustable )

Short-circuit instantaneousprotection (electronic) (




Net communications based on the

MODBUS protocol

t Ir

IiTsd

Tsd=OFFIsdTr

I

t Ir

IiTsd

Tsd=OFFIsdTr

I

t Ir

IiTsd

Tsd=OFFIsdTr

I

11

Chapter 1 Outline of GM8 Series Chapter 1 Outline of GM8 Series 1


Tripping indication module Ti

1Outline

TIs

For GM8-Zs series circuit-breaker, we could equip tripping indication

module. Main function:

(1) Offering tripping signal node output (automatic reset);

(2) Fullling the fault type indication with external controller.

2Function and combination explanation

L : O v e r - l o a d

l ong t ime-de lay

protection

S : Sho r t - c i r cu i t

short time-

delay protection

I: Short-circuit

i n s t a n t a n e o u s

protection

PAL : PAL p re -

alarm

indication

Offering tr ipping signal

node output

Local display fault tripping

category

consistently (manual reset)

Function

When module TIs is mounted on

the circuit-breaker,power supply

and signal could be provided after

circuit-breaker tr ipping and fault

tripping category could be displayed

consistently on external controller.

The module TIs is specially designed,

and can be separately mounted to

adapt to the compact installation

space.

GM8-Zs circuit-breaker should be used co-ordination with module Tls

parameter adjustment

of L,S,I,Ip

Three phase current

circularly display

L,S,I fault tr ipping

indication

(should be supported by

module TI)

Note: TIs module need external AC220V power supply connected by users. If the voltage of power supply is not AC220V, please mark it in ordering.

+ =

12

Chapter 1 Outline of GM8 Series1


10 12 510

58

12

I sd=I i2 I sdOFF 0.8 0.9

0.7 1.0

I n=250AGER23E

160180

200225

125

140

250t sd=0.08s I iI rI rA I pI rFunction indicating diagram of controller panel1Function sketch map of GM8-E electronic controller Over-load (long time-delay ) current setting IrShort-circuit instantaneous current setting IiPre-alarm current setting Ip

2Function sketch map of GM8-Zn/Tn intelligent internal controller

Over-load (long time-delay ) current setting IrOver-load (long time-delay ) time setting TrShort-circuit (short time-delay ) current setting IsdShort-circuit (short time-delay ) time setting TsdShort-circuitinstantaneouscurrent setting IiPre-alarm current setting Ip

3Function sketch map of GM8-Zs/Ts intelligent external controller

Over-load (long-time delay )fault tripping indicationShort-circuit (short-time delay) fault tripping indicationShort-circuit (instantaneous) fault tripping indicationResetting button

0.7Ir Indicated lumpPre-alarm indicated lumpOver-load indicated lumpTest terminalSafety lock hole

Liquid crystal display screen

Use co-ordination with Ti module

"Cancel" buttonDown buttonUp buttonSet/Enter"button

150

60

30

90

16

120.8

.7

.9

1.0

8

3

5

1012

14

OFF

4

2

3

58

12 .06

.1

.2.3

OFF

10

160

125

140

180200

250

225

Ir(A) Tr(s) Tsd(s) Ii(Ir)Isd(Ir) Ip(Ir)

Chapter 1 Outline of GM8 Series

Performance improvement 14

Advanced and safe arc spray outward-oriented design 14

Zero-ashover 15

Degree of protection IP30 15

New contact system 15

Ics=100% Icu 15

The novel external controller 16

Suitable for isolation 17

Back-up electromagnetic protection 17

Mounting, operation and maintenance

Cassette accessories 17

Safety operating device 18

Safe and reliable connection type 18

Compact size 18

Standardization aperture 19

Customized design 19

Advanced technical theory 20

Modulization communication function 21

Chapter 2 Improvements through spur with long accumulation

14

Chapter 2 Improvements through spur with long accumulation2


Performance improvementAdvanced and safe arc spray outward-oriented design

Circuit-breaker is a kind of protective electrical installation,

which protects lines and equipment from damage due to short-

circuit, especially from personal injure, so it must meet high safety

design standard. In former applications, people often injured

by flashover because of the unreasonable arc spray outward-

oriented design. In order to avoid these accidents, GM8 series

circuit-breakers adopt the advanced patent technique of arc spray

outward-oriented design to provide a reliable protection for users.

Arc spray outward-oriented: it is known that the high dense

high-temperature ion and electron would spread into the low

density and low-temperature medium. So, in the period of arc

generate to extinguished, after it passed arc extinguish chamber

and continues to spray out of circuit-breaker, this time, the oriented

structure can give an out-spray direction to it.

Arc temperature: the temperature of the arc can up to

5000~8000

The backward arc-oriented design and its harm

In figure1, a insulating paper (Nomex) be mounted above

the arc extinguish chamber of circuit-breaker. At the usual time,

the elastic insulating paper can protect against foreign body drop

into circuit-breaker. But when short-circuit occurs, the paper will be

bounced outward because of the spraying high temperature and

pressure gas generated by flashover, and the arc will be spray

forward out of circuit-breaker along the paper surface. At this

time, if somebody is closed to the handle or the jet orice is near

the mental cabinet, burn accident or another short-circuit will be

happened.

Why the arc-oriented structures are designed spraying

forward instead of upward in some factories? The long tripping

breaking time, bad current-limiting capacity and long out-

spray(upward) distance are the main reasons for these products.

Due to the ashover distance requirement of above circuit-breaker

can not exceed 50~100mm in IEC60947-2, they design the

ashover forward, but backward and unsafe.

The harmfulness of ashover spraying forward are:

1. Result in that the arcs connect together and misoperation

of upper stage (as gure1)

Usually, there aren't interphase barriers at the front of circuit-

breaker (the plane), if a short-circuit fault happened, ashover out

of each pole is spraying forward, the arc from two adjoining poles

will connect together and lead to a short-circuit at lead-in side,

cause a misoperation of the upper stage, result in an expanding

fault; Meanwhile, It can burn the cabinet and cause a human injury

accident.

2. Circuit-breakers mounted in an open cabinet

If a short-circuit has been exit in circuit, operators will be

injured by ashover sprayed to them when they close to the circuit-

breaker. Because the circuit-breaker will trip due to short-circuit

and spray ashover outward, however, the ashover will be spray

to operator because of the oriented effect of Nomex insulating

paper.(as gure2)

3. Circuit-breakers mounted in a closed cabinet

When there is a short-circuit current in system, the moveable

and static contacts breaking, and arcs generated in each pole

spray forward and connect together by mental cabinet will lead to

an interphase short-circuit, at last, cause a false action of upper

stage circuit-breaker. The arcs spraying to mental enclosure will

generate high temperature to melt down the mental cabinet, and

someone stands front of it will be hurt and cause a safety accident.

4. Circuit-breakers equip with manual or motor-driven

operation device

The four mounting feet of manual or motor-driven operation

device are mounted in the middle of three-phase lead-in side. The

arcs which spray forward and pass the mental mounting feet will

cause a interphase short-circuit again at the lead-in side and lead

to a false action of upper stage circuit-breaker. Arcs spraying to

manual operation device will generate high temperature to melt

down the enclosure of drawer, someone will be shock if his hand

or body contacts the cabinet.

GM8 advanced arc spray outward-oriented design

The arc spraying direction of our advanced circuit-breaker is

designed upward but not forward, it avoids the above safety risk

of those backward circuit-breakers. More details see GM8 series

circuit-breaker.

15

Chapter 2 Improvements through spur with long accumulation Chapter 2 Improvements through spur with long accumulation 2


The elastic Nomex insulating paper where the arc sprays to operator or to the mental enclosure of distribution cabinet.

Spraying forward causes an interphase short-circuit

Figure1 The moulded case circuit-breakers

structure of usual domestic manufacturers

Figure2 Operate the circuit-breaker directly by

operator Circuit-breaker

Cabinet

FIrure3 The mounting of circuit-breaker in closed

x cabinet

Mounting board

Flashover forward causing interphase short-circuit

Mounting foot

FIrure4 The mounting of circuit-breaker in drawer

Flashover direction -- upward

FIrure5 Arc spray outward-oriented design of

GM8 series circuit-breaker

16



Repulsed position of moving contact

Conductor on static contact

Repulsed position of static contact

Flexible connection

Ia current

Ia current

Conductor on static contact

Moving contact

Static contactFlexible connection

Zero-ashoverGM8 series circuit-breaker adopts an innovative arc

control system,so it can quench arc effectively and realize

the zero-ashover easily.

Protection degree IP30Special protective cover can stop any objects with

the diameter of 2.5 mm into the internal of enclosure, the

protection degree could up to IP 30.

Novel contact systemGM8 series circuit-breaker adopts a special designed contact system, which possesses

some merits such as strong repulsion and long open range.

When the circuit-breaker is making:

Movable contact bear a tension and a repulsion as well, named FIac and FIbc

respectively.

Static contact bears two repulsions, named FIab and FIbc respectively.

When the short-circuit current reaches the acting value of the instantaneous release, the

above-mentioned forces will accelerate the speed of moving /static contact arc, increase the

arc length and make the arc quenching easier.

The innovative design of the bidirectional repelling system breakthrough the limitations

of traditional design, that is moving contact upward moving and static contact xed. Then the

opening range between moving contact and static contact is increased greatly.

By adopting this contact system, which has big repulsion and long opening range, GM8

series circuit-breaker is more easily to quench the arc, so it has a higher current-limit ability

and short-circuit breaking capacity.

Protective cover

Protection degree IP30

Contact construction of four repulsion

Ics=100% Icu Thanks to its super current limiting ability, outstanding arc control system and the moving and static contact have superior withstand

arcing ability, GM8 series circuit-breaker has an excellent performance: Ics=100%Icu.

According to Standards GB14048.2 (IEC 60947-2), the test procedures of rated ultimate short-circuit breaking capacity (Icu) and rated service short-circuit breaking capacity (Ics) as follows:

Rated ultimate

short-circuit

breaking

capacity Icu

Verication of overload release Reference temperature/ 2 times setting current/ acting within the longest time in 2 times setting current

Rated ultimate short-circuit breaking capacity test

Operation procedure: O-t-CONote: O-One time opening operation; t-interval; CO-One automatic opening right after one closing operation

Verication of dielectric withstand capacity Take the larger one between 2Ue and 1000V, the leakage current shall not exceed 6mA (Isolation)

Verication of overload release Reference temperature/ 2.5 times setting current/ acting within the longest time in 2 times setting current

Rated service

short-circuit

breaking

capacity Ics

Rated service short-circuit breaking capacity test Operation procedure: O-t-CO-t-CO

Verication of operational performance capability 5% of the electrical durability

Verication of dielectric withstand capacity

Take the larger one between 2Ue and 1000V, the leakage current shall not exceed 2mA (Isolation)

Verication of temperature-rise The temperature of terminals don t exceed 80K

Verication of overload release Reference temperature/ 1.45 times setting current/ acting in 2(1) hour

According to the standards GB14048.2 (IEC947-2), Ics could be 25%, 50%, 75% or 100% of Icu.GM8 series circuit-breaker strictly follows the above-mentioned test procedures, achieves Ics=100%Icu reliably.

Bidirectional repulsion of the moving/static contactGM8-125M/H/R/GGM8-250R/G

17



The novel external controller

The traditional systemWhen the customers have a higher requirement of

maintainability and safety to the low voltage distribution systems, they will spend extra money to purchase the intelligent circuit-breaker installed in the distribution

cabinet. One of their main purposes is: adjust the acting parameters by the adjustment button on the panel of intelligent circuit-breaker.

Whereas, according to investigations, we found that the adjustment acting parameters is very difcult to realize. The reason lies in the external operating device (manual or motor-driven), an accessory which is widely used in the low voltage distribution cabinet.

The handle is installed in the drawer of the circuit-breaker. As a result, the customers cant reach the adjustment panel, so the adjustment function is no-way to achieve.

The price of intelligent circuit-breaker is 2 or 3 times higher than the normal thermomagnetic circuit-breaker which parameters are nonadjustable. It is absolutely a huge waste if the adjustment function cant work.

The new system adopting external controllerIn order to solve the mentioned problem above,

the intelligent controller of GM8-Zs series (belonging to GM8-Z) is external of the circuit-breaker, and connects with circuit-breaker by date lines.

The ex terna l cont ro l le r adopts the same dimensions as the panel amperemeter, it can display the three phase current. So the clients could adjust the parameters on the drawer panel conveniently.

The external control ler doesn t need any additional power supply and any auxiliaries, it can realize the following functions:

Adjust all the acting parameters real time during the application process;

Display the three phase current;Display the tripping type continually (TI module

is needed).

External controller

External controller

Intelligent circuit-breaker

Amperemeter

Amperemeter

Circuit-breaker

18



Suitable for isolation

By increasing the opening range between moving contact and static contact and enhancing the performance of the insulating material

between the conductive parts, GM8 series circuit-breaker has isolation function.

Back-up electromagnetic protectionBoth the electronic and intelligent circuit-breaker are equipped with a back-up protection release

in a magnetic yoke type, its rated acting current is 20Inm (where Inm is frame size). The back-up

protection release plays important roles in the following two aspects:

(1) The back-up protection release will acting before the electronic release when the short-circuit

current of distribution circuit exceeded 20Inm. Consequently, it can increase the acting sensitivity

and maximum guarantee the safety of the power supply lines.

(2) When the electronic release broke down, the back-up release will act a back-up protection

function, providing double protection for the safety of the power supply lines.Back-up protection release of

magnetic yoke type

Installation, Operation and Maintenance

Cassette Accessories

The false action or failure action

problem often occurs for moulded case

circuit-breakers field use. Therefore,

Beijing People's Electric Plant Co., Ltd.

organized experts to analyze and they

found that many problems were related

to the error installation of accessories

or foreign matters drop into the circuit-

breakers after accessories installation.

Because o f a l l these accessor ies '

installation process is:

Step 1: Press down the button "Trip"

to make circuit-breaker tripping;

Step 2: Twist off all big screws on the

cover of circuit-breaker (In general, there

are 8-12 big screws, so we need spend

more time and bigger torque to do it.);

Step 3: Open the cover of circuit-

breaker (At this time, all parts in circuit-

breaker are exposed and arc extinguishers

always drop out.);

Step 4: Install the accessories (During

installing, some important parts of circuit-

breakers, like tripping device and bimetal

element, maybe touched unexpected, so

their position will be changed and then

affect the operation characteristic of circuit-

breakers, sometimes operator's arms also

be hurt and foreign matters easily drop

into circuit-breaker, such as cable head);

Step 5: Close the cover of circuit-

breaker (in order to make sure the cover

and body of circuit-breaker matched well,

the accessories and internal parts must be

at the correct position.);

Step 6: Turn all the screws on cover

tight (All screws must be tighten, otherwise

it will affect the safety of circuit-breaker.

When there is a short-circuit current, the

high temperature and high pressure arc

gas generated by movable and static

contacts breaking may push off the cover

and cause safety accidents.)

On the whole, we can clearly find

that above installation method not only

inf luences the safety and operation

characteristics of circuit-breaker, but also

inconvenient to operation. At the same

time, the normal functions of accessories

will be affected if they are installed at an

incorrect position or match with the circuit-

breaker body not very well.

Step 1 Step 2 Step 3 Step 4 Step 5

19



Safety operating device

GM8 adopts a double layer insulation handle to guarantee the absolute

safety of the operators.

The first insulation protection: The handle is molded with high insulting

property engineering plastics, which makes the handle has super-strong insulating

property.

The second insulation protection: As the well insulating design, the metal

operating device connected with handle is isolated from the internal conductors.

The adoption of the double insulation handle ensures the circuit-breaker is

much safer and reliable even when the handle is damaged.

Safety and reliable connection type

Connection type of other manufacturers Improved connection type

Tap on the static contact connector; screw it together with the external

connector.This kind of connection is less reliable and easy to loosen.

Adopting the iron nut to screw the connectors together with static contact, so

it is more stable and reliable.

Compact sizeThanks to the new conductive and arc control system scheme, GM8 circuit-breaker acts more stable and short-circuit breaking

capacity is improved widely, what s more, the size is reduced substantially.

GM8-630 shares the same case dimensions with GM8-400, which means GM8-630 is smaller, and the performance is much better

than the primary version (the original width: 182mm, the original breaking capacity: 65kA; the present width: 140mm, the present breaking

capacity: 100kA).

182m

m

140m

m

GM8-630A/3P

Breaking capacity 100kA

Other domestic product 630A/3P


Imported product 630A/3P

Breaking capacity:70kA

External connecting board

Connecting board self-fastening

Static contact connecting board

External connecting board

Tightening with iron nut

Static contact connecting board

Insulating tube

Movable contact

Handle

20



GM8-125A was improved and the thickness is reduced to 68 mm at the minimum.

86m

m

68m

m

Standardization aperture

GM8-125A/3P


Other domestic product 125A/3P


Imported product 125A/3P

Breaking capacity:50kA

Adopting novel design theory, the mounting dimensions of GW8 were modied into two types to make the manufacture process of

complete equipment is much simpler.

60 90

125/250 Type 125/250 Type

Customized design

There are use indication windows on the panel

of the circuit-breaker, so the purpose of circuit

could be labeled on the circuit-breaker directly.

The circuit label could be served with the

circuit-breakers, but the users should explain the

purpose of circuit-breaker when ordering.

When the accessory is installed, it is very

convenient to lead out its signal lines to the

corresponding terminals along the lateral lead slot.

Due to this merit, GM8 series circuit-breakers can

be mounted next to each other, leaving the mount

size more compact.

21



Advanced technical theory

1.High reliability and safety of the circuit

GM8 series circuit-breaker processes with the virtual effective value; it can fundamentally prevent

the false tripping of the intelligent circuit-breakers to realize the accurate protection. The circuit

analysis plan as the following graph:

2.Pre-alarm indication function

Both the electronic and intelligent circuit-breaker have a pre-warning function. They

can indicate the over load condition before circuit-breaker tripping. When the load current

exceeded the setting value, the micro processor will output a pre-alarm signal through the

solid-state relay to light the PAL pre-alarm indicated lump.

CT

CT

CT

CT *OQVU0VUQVUI

CV

PSS

WDT

CPU

SSW

LSW

PSW

A/D 0WFSMPBEDVSSFOUJOEJDBUFEMVNQ1SFBMBSNJOEJDBUFEMVNQ Pre-alarm output

**OTUBOUBOFPVTDJSDVJU$77PMUBHFTUBCJMJ[JOHDJSDVJU1441IBTFDIPPTJOHTBNQMFDJSDVJU8%5$MPDLEPHUJNJOHDJSDVJU4484IPSUUJNFEFMBZTPGUXBSF-48-POHUJNFEFMBZTPGUXBSF1481SFBMBSNTPGUXBSFThe terminals of power supply Breaker-circuit operational device Customized integration apparatus

The terminal of load Load current indicated lump70%

Test input Characteristics setting

Converter

Tripping coil

Micro processor

Trigger circuit

Rectification apparatus

4BNQMJOHBOE"%DPOWFSTJPO$BMDVMBUJPOPGUIFFGGFDUJWFWBMVF$IBSBDUFSJTUJDTPGQSPDFTTJOHUIFMPOHUJNFEFMBZQSFBMBSN

22



Modulization of communication functions

GM8-T series (also belonging to GM series circuit-breaker) is a communicative product. The communication accessories includes: external communication module, RS485 interface extended plate, communication controller and series of conguration software. The external communication module is connected to the circuit-breaker. The clients can conveniently build the communication net consistent with the MODBUS protocol, the schematic diagram as follows

23



Communication protocol

Field-bus protocol MODBUS-RTU is comply with the international standard IEC61158. The physical layer electrical interface is the serial RS485, which consistent with the international standard TIA/EIA-485-A. The date frame format is 1 start bit, 8 date bits, 2 stop bits, none verification (Including odd and even verifying). The report format is address code (1 bit), function code (1 bit), date domain (maximum 252 bits), CRC verication (2 bits).

Network characteristics

The communication medium is double-wiring shielded line. Each communication line can connect with 32 devices at the maximum and with 1000 meters at its longest distance. A repeater is needed if the distance is exceeded than 1000 meters, and a brancher has to be adopted if there is a branch.The standard band rate is 19200bps (could be set to 9600bps or 38400bps). Besides, all the devices connected to the same bus must share the same band rate and parity check, and the address of the slave station cant repeat.When there are too many devices connected to the bus, a RS485 adapter is needed to connect more devices. The devices in one slave station cant exceed 247 in the MODBUS communication system.

Communication controller

The communication controller is connected with the circuit-breaker by special communication lines. The controller can set the parameters (slave-station address, communication bond rate, current parameter, tripping parameter), display the parameters, electric switching control, display warning (overload, short-circuit fault) and communication (local and remote communication). The communication controller doesnt need external power supply and consequently is very convenient to be installed in the distribution cabinet. The controller will automatically scan the circumscribed devices when turned on and build a dynamic address list. The limitation is no more than 32 devices. The controller can achieve remote communication by connecting it to the remote monitoring computer.

Remote communication

By connecting the circuit-breaker and monitoring computer with double-wiring shielded line and RS485 converter. To set, display and communicate locally and remotely, we should connect the controller with the circuit-breaker before it was connected to the remote monitoring computer.

I f the circui t-breaker adopts electr ic operating device, the remote control can achieve. If adopt network instruments, remote measurement of the electrical parameters can achieve.Due to adopting the standard protocol MODBUS-RTU, the controller can be further interfaced with the industrial Ethernet.

Conguration software

The moni tor ing computer can adopt c o n f i g u r a t i o n s o f t w a r e t o a c h i e v e t h e management of power and distribution systems.The conguration software is usually customized mode. The inter face is beaut i fu l , v isual , friendly, various and convenient for the device management.Integration network solutions are also ready for our clients.

Chapter 3 Technical Specications

GM8-TM thermomagnetic moulded case circuit-breaker 24

GM8-E electronic moulded case circuit-breaker for distribution

protection 31

GM8-Z intelligent moulded case circuit-breaker for distribution

protection 45

GM8-X electromagnetic moulded case circuit-breaker for distribution

protection 57

GM8-TM SeriesThermomagne t i c mou lded case circuit-breaker

Over-load long-time delay protection

Short-circuit instantaneous protection

26

Chapter 3 Technical Specications3


Application range

GM8-TM se r i es mou lded case

c i rcu i tbreakers are one of the new

type circuit-breakers which have been

developed using international advanced

design and manufacturing technology,

menwhile, the circuit-breaker complies

with the demands of the new international

standards. The rated insulation voltage

of the circuit-breakers is 800V, which

could be used in the circuit of AC 50Hz,

rated operational voltage 400V or 690V

and rated operational current 10A-800A,

where the circuit-breakers take the role of

infrequent closing/opening and infrequent

motor starting-up. The circuit-breakers are

feature with over-current, short-circuit and

under-voltage protection functions, so it

can protect the distribution circuit and the

power equipment from damage.

Design

According to rated ultimate short-

circuit breaking capacity, GM8-TM series

circuit-breakers can be classied into four

categories: M typical type (35KA); H higher

type (50KA); R high type (70KA);G highest

type (80 100KA). The circuit-breaker is

feature with compact size, high breaking

capacity, zero-flashover and vibration

resistance.

The c i r cu i t - b reake rs can be

installed vertically (upright) or horizontally

(transverse).

Wired adversely is forbidden for the

circuit-breakers, so 1,3 and 5 can only

be connected with power line:2,4 and 6

can only be connected with load line.

The circuit-breaker has isolation

function and corresponding symbol is

shown as

The circuit-breaker can be used at

ambient air temperature below 40 and do

not need lowering capacity.

Circuit-breaker and over-current

release are integrated and provided as an

equipments. There are four kinds internal

accessories: auxiliary switch, alarm switch,

shunt release and under-voltage release.

Internal accessories is easy to mount

by adopting a cassette type, so that the

accessories can be installed directly in eld

or in the factory.

Standard

IEC60947-1 and GB14048.1-2000

General rules

IEC60947-2 and GB14048.2-2001

Lowvoltage circuit-breakers

IEC60947-4 and GB14048.4-2003

Contactor and motor starter

IEC60947-5-1 and GB14048.5-

2001Electromechanical control circuit

devices.

Normal serv ice and mounting conditions

The altitude of the site of installation

does not exceed 2000m;

The ambient air temperature

dose not exceed +40 and the lower limit

of the ambient air temperature is -5 ,

meanwhile, its average over a periods of

24h does not exceed +35 .

The relative humidity of he air

does not exceed 50% at a maximum

temperature of +40 . Higher relative

humidities may be permitted at lower

temperature e.g. 90% at +20 . Special

measures may be necessary in cases of

occasional condensation due to variations

in temperature;

Pollution degree: 3;

Mounting categories: The mounting

category of main circuit, under-voltage

release is and other auxiliary and control

circuits is ;

The circuit-breaker could not be

mounted in the place with the explosive

possibility, and there must be not any

gas which would corrode metal or any

conducting dust which would destroy the

insulation.

The circuit-breaker should be

mounted in the place protect against

splashing spraying water.

Circuit-breakers should be mounted

in accordance with instructions.

The protection degree of circuit-

breakers could be up to IP30 (comply with

the demands of IEC60947-1), and the

protection degree is IP20 without protective

cover up and down.

Main characteristic

GM8-TM thermomagnetic moulded

case circuit-breakers have over-load long-

time delay and short-circuit instantaneous

two-levels protection function.

GM8-TM series circuit-breakers

can be equipped with internal cassette

accessories.

GM8-TM series circuit-breakers are

zeroashover.

Category o f 4 -po le circuit-breakers

Classication according to the type of

neutral pole (pole N):

Type A: Pole N is non-equipped

with overcurrent tripping device, which

is making always and do not closing or

opening with other three poles.

Type B: Pole N is non-equipped with

overcurrent tripping device, which always

closing or opening with other three poles

contact rstly and then opening .

Type C: Pole N is equipped with

over-current tripping device, which always

27

Chapter 3 Technical Specications Chapter 3 Technical Specications 3


Protective characteristics

Distribution protection

Over-load long-time

delay protection

Distribution protectionTM

Generator protectionTMF

Transformer protectionTMB

Mine-used circuit-breakerTMU

1.05InCold state 2h Not actingIn63A1hNot acting

1.3InHeat state 2h ActingIn63A1h Acting

InInternal xed

Short-circuitinstantaneous

protection

Distribution protectionTMM 10In20%

Generator protectionTMF 3In20%

Transformer protectionTMB 5In20%

Mine-used circuit-breakerTMU 10In20%

Motor protection

Over-load long-timedelay protection

Motor protectionTMD

1.0InCold state 2h Not acting

1.2InHeat state 2h Acting

1.5InHeat state 8min ActingIn225A4min Acting

7.2InCold state 6sTp20s ActingIn225A4sTp10s Acting

Short-circuitinstantaneous

protectionMotor protectionTMDMD 12In20%

Note: the code explanation of thermomagnetic release

TThermal release MMagnetic release BTransformer protection

FGenerator protection DMotor protection UMine-used circuit-breaker


(contact rstly and then opening ).

Type D: Pole N is equipped with over-

current tripping device, which is making

always and do not closing or opening with

other three poles.

Over-current tripping value of pole N

needs to be provided by the users.

28



Technical specications

Type GM8-125/TM GM8-250/TM GM8-400/TM GM8-630/TM GM8-800/TM

Frame size Inm A 125 250 400 630 800

Rated current InA12510080

6350403225201610

250225200180160140

125

400350315250

630500400800700

630500400

Short-circuit instantaneous acting current Ii ADistribution protectionTM10In20%Generator protectionTMF3In20%Mine-used protectionTMU10In20% Transformer protectionTMB5In20%Motor protectionTMD12In20%

The code of rated short-circuit breaking capacity M H R G M H R G M H R G M H R G M H R G


AC 400V kA 35 50 70 85 35 50 70 85 35 50 70 100 35 50 70 100 35 50 70 100

AC 690V kA 25 25 25 25 25

Rated service short-circuit breaking capacity

Ics

AC 400V kA 35 35 50 70 35 35 50 70 35 50 70 75 35 50 70 75 35 50 70 75

AC 690V kA 10 10 15 15 15

Pole number P 34

Rate insulation voltage Ui ACV 800

Rate impulse withstand voltage Uimp V 8000

Rate operational voltage Ue ACV 400690

Arc distance mm 0 Note

Uitilization category A

Prospective-maximization maintenance durability

Mechanical/Electrical440VIn/2times 15000/12000 15000/12000 15000/12000 15000/8000 15000/7500

Test durability Mechanical/Electrical times 8500/6000 7000/3000 4000/2000 4000/1500 2500/1000

Overall

dimensions

mm 90 105 140 140 210

L mm 174 184 284 284 302

H mm 68 86 68 86 103 103 103

Mounting type Fixed front : none, rear: B , plug-in type (C), withdrawable type(C2)


Cassette

accessories

Auxiliary switch AX Note

Alarm switch AL

Shunt release SHT

Under-voltage release

UVT

External

accessories

Motor-driven operational

device P

Turning handle operational

mechanism Z

Connecting bar L

Mechanical interlocking

MI

Note When the protective cover of GM8-125 and GM8-250 is removed 9.5mm in height, the arc distance50mm;

When the protective cover of GM8-400 GM8-630 and GM8-800 is removed 13.5mm in height , the arc distance 100mm;

All 4P products are short ashover.

means this function is provided;means without this function.

29



GM8-125/Acting characteristics curve and temperature compensating curve

GM8-TM acting characteristics curve and temperature compensating curve

Act

ing

time

x100%Rated current

Temperature compensating curve

Rated ambient air temperature 40 Ambient air temperature ()

Set

ting

curr

ent(%

)

In=63A~125AMax.63~125

Act

ing

time

x100%Rated current

63A~125A



Set

ting

curr

ent(%

)

30



GM8-250/TM Acting characteristics curve and temperature compensating curve

Act

ing

time

x100%Rated current



Set

ting

curr

ent(%

)


Act

ing

time

x100%Rated current



Set

ting

curr

ent(%

)

31




GM8-800/ Acting characteristics curve and temperature compensating curve

Act

ing

time

x100%Rated current



Set

ting

curr

ent(%

)

Act

ing

time

x100%Rated current



Set

ting

curr

ent(%

)



Short-circuit short-time delay protection


Pre-alarm indicator

GM8-E ElectronicMoulded case c i rcui t -breaker for distribution protection

33



Application range

GM8-E series moulded case circuit-

breakers are one of the new type circuit-

breakers which have been developed

using international advanced design and

manufacturing technology. Meanwhile, the

circuit-breaker complies with the demands

of the new international standards and

widen the range of stage dif ference

coordination. The rated insulation voltage

of the circuit-breakers is 800V, which could

be used in the circuit of AC 50Hz, rated

operational voltage 400V or 690V and rated

operational current 16A-800A, where the

circuit-breakers take the role of infrequent

turn on/off and infrequent motor starting-

up. The circuit-breaker has over-load long-

time delay, short-circuit short-time delay

and under-voltage protection functions, so

it can protect the distribution circuit and the

power equipment from damage.

Design


circuit breaking capacity, GM8-E series

circuit-breakers can be classied into three

categories: H higher type 50KA ; R high

type 70KA ;G highest type 80 100KA . The

circuit-breaker is feature with compact size,

high breaking capacity, zeroashover and

vibration resistance.

The circuit-breakers can be installed

vert ical ly upright or horizontal ly

transverse .


circuitbreakers, so 1,3 and 5 can only be

connected with power line:2,4 and 6 can

only be connected with load line.


function and its corresponding symbol is

shown as .

The protective characteristic of

circuitbreaker is not influenced by the

change of ambient air temperature Circuit-

breaker and over-current release are

integrated and provided as an equipments.

There are four kinds internal accessories:

auxil iary switch, alarm switch, shunt

release and under-voltage release. Internal

accessories is easy to mounting by

adopting a cassette structure, so that the

accessories can be installed directly in eld

or in the factory.

Standard

IEC60947-1 and GB14048.1-2000

General rules.

IEC60947-2 and GB14048.2-2001

Lowvoltage circuit-breakers.




The ambient air temperature dose

not exceed +40 and the lower limit

of the ambient air temperature is -5 ,

meanwhile, its average over a periods of

24h does not exceed +35 .

The relative humidity of he air

does not exceed 50% at a maximum

temperature of +40 . Higher relative

humidi ty may be permit ted at lower

temperature e.g. 90% at +20 . Special

measures may be necessary in cases of

occasional condensation due to variations

in temperature;

Pollution degree: 3.

Mounting categories: The mounting

category of main circuit, under-voltage

release is and other auxiliary and control

circuits is ;






insulation








the demands of IEC60947-1), and the


cover up and down.

Main performance GM8-E series electronic distribution

protection moulded case circuit-breaker

equipped with electronic release GER23E

which adopted microprocessor technology,

it can ensure the high accuracy of tripping

, high reliable of acting and the accuracy of

acting can not be inuenced by the change

of ambient air temperature. GER23E could

be integrated on the circuit-breaker and

achieve kinds of characteristic protection

of distribution circuit in the condition of

without external power supply. GER23E

has three-levels protective function and

has better selective combining with other

protective device of the circuit.

Three-levels protective function:

Both Ir and Ii could be set or adjusted by

the users according to the requriement of

load current, Isd and Tsd could be adjusted

with Li and can be off; electronic controller

do not need external power supply and

current signal and control power supply

comes from the ring currenttransformer

internal circuit-breakers;

Pre-alarm indicator: when the load

current exceed preinstall current, the LED

PAL on the panel of circuit-breaker turn

yellow;

Over-load indicator: when the load

current exceed setting current, LED

34



Electronic over-current releaseOver-load indicated lump

Pre-alarm indicated lump

0.7Ir Indicated lump

Test Test Port: Verication the reliability of

controller

The current of pre-alarm IP can be adjusted

The current Ii of short-circuit instantaneous can be adjusted The function of short-circuit short-time delay could be adjusted with Ii, can be offThe current Ir of over-load long-time delay can be adjusted

160

125

140

180200

250

225

0.8

0.7

0.9

1.0

10

5

8

125

12

10

Ir(A) Ii(Ir)Tsd=0.08s

GER23EIn=250A

Ip(Ir)

Ii2Isd= Isd (OFF)

OVER

PAL

70%

OVER on the panel of circuit-breaker

turn red;

Reliable back-up protection: when

the short-circuit current exceed I20Im,

the back-up electromagnetic tripping

device of circuit-breaker acting;

Provide hand special tester: test

the reliable of electronic controller internal

circuitbreaker.

Ze ro - f l ashove r : mak ing the

distr ibution system more safety and

reliable.

The exper t sys tem cascade

protection: according to the rated current

In of circuit-breaker, the tripping time and

returnability time of shortcircuit short-

time delay have been set, so the cascade

coordination could be simple.

Comply with the EMC requirements of

GB14048.2 annex J.

Category o f 4 -po le circuit-breakers












over-current tripping device, which always



Type D: Pole N is equipped with over-

current tripping device, which is making

always and do not closing or opening with

other three poles. Over-current tripping

value of pole.

35



The diagram of cascade protection expert system for GM8-E series circuit-breaker

GW8 conventional circuit-breaker

The acting time of short-circuit short-time delayprotection

Tsd is set 0.4s

GM8-800 630/E electronic moulded case circuit-breaker

The acting time of short-circuit short-time delay protection

Tsd is set 0.2s

GM8-400/E electronic moulded case circuit-breaker


Tsd is set 0.13s

GGM8-250/E electronic moulded case circuit-breaker


Tsd is set 0.08s

GM8-125/E In=125A electronic moulded case circuit-breaker


Tsd is set 0.05s

GM8-125/E In=63 32A Electronic mouldeed case circuit-breaker


Tsd is set 0.03s

The select ive of

cascade protection time

of GM8-E series circuit-

breaker is obta ined

basing on a great deal

o f exper imenta t ion ,

t h e a c t i n g t i m e o f

upstream larger than

the sum of the acting

t ime of downstream

and the acting time of

operational device. Tsd

is internal xed and can

not be adjusted, which

co-ordination with Isd.

36



Technical specicationsType GM8-125/E GM8-250/E GM8-400/E GM8-630/E GM8-800/EFrame size Inm A 125 250 400 630 800Rated current In A 3263125 250 400 630 800The code of short-circuit breaking capacity H R G H R G H R G H R G H R G


AC 400V kA 50 70 85 50 70 85 50 70 100 50 70 100 50 70 100AC 690V kA 25 25 25 25 25


AC 400V kA 35 50 70 35 50 70 50 70 75 50 70 75 50 70 75AC 690V kA 10 10 15 15 15

Pole number P 34Rate insulation voltage Ui ACV 800Rate impulse withstand voltage Uimp V 8000Rate operational voltage Ue ACV 400690Short-time withstand current Icw kA/0 .8s 5 7.6 9.6

Over-load long-time delay protective current IrA

In=32A16~32 AdjustableIn=63A32~63 AdjustableIn=125A 63~125 Adjustable

125~250

Adjustable

200~400

Adjustable

315~630

Adjustable

400~800

Adjustable

Acting time of Over-load(long-time delay)protection(at 2Ir)s

100Internal xed

100Internal xed

120Internal xed

120Internal xed

120Internal xed

short-circuit instantaneous protective current IiA

Three-levels protection5-8-10-12Ir Adjustable Two-levels protection5-10-12Ir Adjustable

Short-circuit Short-time delay

protectio

Acting current Isd Isd A 50%Ii (Adjusted with li )or OFF

Acting time Tsd

s

Inverse time-delay IsdI1.5Isd Accord with I

2t=1.5Isd2Tsd

Denite time-delay1.5IsdIIi

In=3263A0.03Internal xedIn=125A0.05Internal xed

0.08Internal xed

0.13Internal xed

0.20Internal xed

0.20Internal xed

Pre-Alarm(for indication) Starting current IpA 0.70.750.80.850.90.951.0IrAdjustable 0.7Ir Indicated lump 0.7Ir10% The indicated lump shall turn on continuous

PAL pre-alarm indicated lump When the current up to Ip, the lump shall be ashing (Interval 1s );

Over-load indicated lump 1.2Ir5%Flashing (Interval 1s ) Arc distance mm 0 Note

Utilization category A B

Prospective-maximizationmaintenance durability

Mechanical/Electrical440V,In/2 times 15000/12000 15000/12000 15000/12000 15000/8000 15000/7500

Test durability Mechanical/Electrical times 8500/6000 7000/3000 4000/2000 4000/1500 2500/1000

Overalldimensions

W mm 90 105 140 140 210L mm 174 184 284 284 302Hmm 68 86 68 86 103 103 103

Mounting typeFixed front : none, rear: B , plug-in type (C), withdrawable type(C2)

(Only suitable for the circuit-breaker of frame size 400A)

Internalaccessories

Cassette accessories

Auxiliary switch AX Note

Alarm switch AL Shunt release SHT U n d e r - v o l t a g e r e l e a s e UVT

Externalaccessories

Motor-driven operational device P

Turning handle operational mechanism Z

Connecting bar L Mechanica l in ter lock ing MI

Note 1 When the protective cover of GM8-125 and GM8-250 is removed 9.5mm in height, the arc distance50mm;When the protective cover of GM8-400 GM8-630 and GM8-800 is removed 13.5mm in height , the arc distance 100mm; All 4P products are short ashover. means this function is provided;means without this function.

37



t Ir

IiTsd

Isd=OFFIsd= Ii12

Tr

I

Schematic diagram of GM8-E electronic release

1GM8-125/E electronic release

In=32A

In=63A

In=125A

Characteristic curve


160

125

140

180200

250

225

0.8

0.7

0.9

1.0

10

5

8

125

12

10


GER23EIn=250A

Ip(Ir)

Ii2Isd= Isd (OFF)

t Ir

IiTsd

Isd=OFFIsd= Ii12

Tr

ICharacteristic curve

20

16

25

32

0.8

0.7

0.9

1.0

10

5

8

125

12

10


GER23EIn=32A

Ip(Ir)

Ii2Isd= Isd (OFF)

40

32

5650

63

0.8

0.7

0.9

1.0

10

5

8

125

12

10


GER23EIn=63A

Ip(Ir)

Ii2Isd= Isd (OFF)

70

63

8090

100

110

125

0.8

0.7

0.9

1.0

10

5

8

125

12

10


GER23EIn=125A

Ip(Ir)

Ii2Isd= Isd (OFF)

38






t Ir

IiTsd

Isd=OFFIsd= Ii12

Tr

ICharacteristic curve



t Ir

IiTsd

Isd=OFFIsd= Ii12

Tr

I

t Ir

IiTsd

Isd=OFFIsd= Ii12

Tr

I

250

200

225

315

400

3500.8

0.7

0.9

1.0

10

5

8

125

12

10

Ir(A)

Ii(Ir)

Tsd=0.13s

test

GER23EIn=400A

Ip(Ir)

Ii2Isd= Isd (OFF)

450

315

400

500

630

5600.8

0.7

0.9

1.0

10

5

8

125

12

10

Ir(A)

Ii(Ir)

Tsd=0.2s

test

GER23EIn=630A

Ip(Ir)

Ii2Isd= Isd (OFF)

630

400

500

700

800

7500.8

0.7

0.9

1.0

10

5

8

125

12

10

Ir(A)

Ii(Ir)

Tsd=0.2s

test

GER23EIn=800A

Ip(Ir)

Ii2Isd= Isd (OFF)

39



1Inverse time-delay acting characteristic of over-load long-time delay protection as table1

Protective characteristic data of circuit-breaker

Inverse time-delay acting characteristic of over-load long-time delay protection

Current Acting time

Distribution

protection

1.05Ir 2h Not actingIn63A1hNot acting

1.3Ir 2h ActingIn63A1hActing

2Ir Acting time TrsInm=125A250A

Tr=100Internal xed

Inm=400A630A800A

Tr=120Internal xed

Note Inverse time-delay acting time of over-load long-time delay1.2IrIIsdaccords with I2T=2Ir2Tr

Over-load long -time delay acting time: TrTr20%

Time of duration of non-tripping(returnability time)70%Tr

2Acting characteristic of short-circuit short-time delay protection as table

3Acting charactristics of short-circuit (instantaneous protection as table

Acting charactristics of short-circuit (instantaneous protection

Setting current Ii A Three-levels protection581012IrAdjustable Two- levels protection51012IrAdjustable

Max acting time Ti s 0.025

Acting characteristic of short-circuit short-time delay protection

Frame size Inm A 125 250 400 630/800

Acting current Isd A 0.5Ii(Adjust with Ii, can be OFF)

Inverse time-delay acting time TIsdI1.5Isd s Accord with I

2T= 1.5Isd2Tsd

Denite time-delay

acting time

1.5IsdIIi

Setting time Tsd s

In=3263A 0.03Internal-xedIn=125A 0.05Internal-xed

0.08 Internal-xed 0.13Internal-xed 0.20Internal-xed

Returnability time Tdf

s

In=3263A 0.02

In=125A 0.040.06 0.10 0.16

Table1

40



4Acting characteristics of pre-alarm for indication as table 4

Acting characteristics of pre-alarm(for indication)

Setting current A 0.70.750.80.850.90.951.0IrAdjustable

5When the users have no special requirement ordering , the parameters of circuit-breaker tripping characteristics shall be installed according to table

Setting value of circuit-breaker factory

Over-load long-time delayprotection

Setting current Ir A In

Time-delay Tr s125A250A 400A630A800A

100sInternal-xed 120sInternal-xed

Short-circuit short-time

delay protection

Setting current Isd A 1/2Ii

T ime -de lay Tsd

s

125 250 400 630/800

In=3263A 0.03Internal-xed

In=125A 0.05Internal-xed

0.08

Internal-xed

0.13

Internal-xed

0.20

Internal-xed

Short-circuit instantaneous

protection

Setting current Ii

A10Ir

PAL Setting current Ip A 0.8Ir

6Power loss as table6

Table of power loss

Type CurrentAPower loss of three phaseVA

Front or rear connection Plug-in connection

GM8-125/E 125 35 40

GM8-250/E 250 62 70

GM8-400/E 400 115 125

GM8-630/E 630 190 210

GM8-800/E 800 262 294

41



Tripping characteristic curve of GM8-E

Act

ing

time

Adjustable Non-adjustable

Parameters Adjusting range Routinel setting Note

Ir AIn=32 16202532

In

Adjustable

In=63 3240505663

Ii IrIsd ON 581012

10IrIsd OFF 51012

Isd Ir 0.5Iiadjust with Ii or OFF 0.5Ii

Ip A 0.70.750.80.850.90.951.0IrAdjustable 0.8Ir

Tr s 1002Ir h 100Internal-xed

Tsd sInverse time-delay Accord withI2T=1.5Isd2Tsd

0.03Denite time-delay 0.03

In=32A63ACurrent settingIr

Tripping characteristic curve of GM8-125/E

42



Parameters Adjusting range Routine setting Note

Ir A In=125 63708090100110125 In

AdjustableI i Ir

Isd ON 58101210Ir

Isd OFF 51012

Isd Ir 0.5Iiadjust with Iior OFF 0.5Ii


Tr s 1002Ir 100Internal-xed



Act

ing

time


In=125ACurrent settingIr


43





Ir A In=250 125140160180200225250 In

AdjustableIi IrIsd ON 581012

10IrIsd OFF 51012




Tsd sInverse time-delay I2T=1.5Isd2Tsd



Act

ing

time


44




Ir A In=400 200225250315350400 In

AdjustableIi IrIsd ON 581012

10IrIsd OFF 51012



Tr s 1202Ir 120

Internal-xedTsd s

Inverse time-delay Accord with I2T=1.5Isd2Tsd0.13

Denite time-delay 0.13

Act

ing

time




45



Act

ing

time


In=630/800ACurrent settingIr


Ir AIn=630 315400450500560630

In

Adjustable

In=800 400500630700750800

Ii IrIsd ON 581012

10IrIsd OFF 51012


Ip A 0.70.750.80.850.90.951.0Ir Adjustable 0.8Ir




Tripping characteristic curve of GM8-630 800/E



Short-circuit short-time delay protection


Pre-alarm indicator

GM8-Z IntelligentMou lded case c i r cu i t - b reake r f o r distribution protection

47



Application range

GM8-Z series moulded case circuit-

breakers are one of the new type circuit-

breakers which have been developed

using international advanced design and

manufacturing technology, menwhile, the

circuit-breaker complies with the demands

of the new international standards. The

rated insulation voltage of the circuit-

breakers is 800V, which could be used in

the circuit of AC 50Hz, rated operational

voltage 400V or 690V and rated operational

current 16A-800A, where the circuit-

breakers take the role of infrequent closing/

opening. The circuit-breaker has over-

load long-time delay, short-circuit short-

time delay and under-voltage protection

functions, so it can protect the distribution

circuit and the power equipment from

damage.

Design


circuit breaking capacity, GM8-Z series

circuit-breakers can be classied into three

categories: H higher type (50KA) ; R high

type (70KA) ;G highest type (80~100KA) .

The circuit-breaker is feature with compact

size, high breaking capacity, zeroashover

and vibration resistance.

The circuit-breakers can be installed

ve r t i ca l l y (up r igh t ) o r ho r i zon ta l l y

(transverse) .


circuitbreakers,so 1,3 and 5 can only be

connected with power line:2,4 and 6 can

only be connected with load line.


function and its corresponding symbol is

shown as

The protective characterist ic of

circuitbreaker is not influenced by the

change of ambient air temperature.Circuit-

breaker and over-current release are

integrated and provided as an equipments.

There are four kinds internal accessories:

auxil iary switch, alarm switch, shunt

re lease and under-vol tage re lease.

Interna accessories is easy to mounting

by adopting a cassette structure, so that

the accessories can be installed directly

in eld or in the factory.GM8- Z series can

be classified into two category: internal

controller (GM8-Zn) and external controller

(GM8-Zs ).

Standard

IEC60947-1 and GB14048.1-2006

General rules

IEC60947-2 and GB14048.2-2008

Low-voltage circuit-breakers




The ambient air temperature dose

not exceed +40 and the lower limit of the

ambient air temperature is -5 , meanwhile,

its average over a periods of 24h does not

exceed +35 ;

The relative humidity of he air does

not exceed 50% at a maximum temperature

of +40 . Higher relative humidity may be

permitted at lower temperature e.g. 90% at

+20 . Special measures may be necessary

in cases of occasional condensation due to

variations in temperature;

Pollution degree: 3;





conducting dust which would destroy

the insulation.






insulation.








the demands of IEC60947-1) , and the


cover up and down.

Main characteristic

GM8-Zn(intelligent internal controller)

and GM8-Zs external controller series

distribution protection moulded case circuit-

breaker equipped with electronic release

GER53Z and GER53ZS which adopted

microprocessor technology, it can ensure

the high accuracy of tripping , high reliable

of acting and the accuracy of acting can not

be inuenced by the change of ambient air

temperature. GER53Z could be integrated

on the circuit-breaker and achieve kinds

of characteristic protection of distribution

circuit in the condition of without external

power supply. GM8-Z intelligent distribution

protection moulded case circuitbreaker

has three-levels protective function and

has better selective combining with other

protective device of the circuit.

Three-levels protective function:

Both current and time of release could

be installed by users according to the

requriement of load current and system.

Intelligent controller do not need

external power supply and current signal

and control power supply comes from the

ring currenttransformer internal circuit-

breakers.

48



Function diagram of GM8-Zn controllerOver-load indicated lump

Pre-alarm indicated lump

0.7Ir Indicated lump

Test Port: Verication the reliability of controller

Pre-alarm current adjustable

Short- circuit instantaneous current adjustable

Short- circuit short-time delay time adjustable

Short- circuit short-time delay current adjustable

Over-load long-time delay time adjustable

Over-load long-time delay current adjustable

150

60

30

90

16

120.8

.7

.9

1.0

8

3

5

1012

14

OFF

4

2

3

58

12 .06

.1

.2.3

OFF

10

160

125

140

180200

250

225

Ir(A) Tr(s) Tsd(s) Ii(Ir)Isd(Ir) Ip(Ir)

OVER

PAL

70%

Pre-alarm indicator: when the load

current exceed preinstall current, the LED

PAL on the panel of circuit-breaker turn

yellow.

Over-load indicator: when the load

current exceed setting current, LED OVER

on the panel of circuit-breaker turn red.

LCD liquid crystal panel: GM8-

Zs circuitbreaker equips with liquid crystal

panel.

Reliable back-up protection: when

the short-circuit current exceed 20Im, the

back-up electromagnetic tripping device of

circuit-breaker acting.

Provide hand special tester: test

the reliable of intelligent controller internal

circuitbreaker.

Zero - f lashover : mak ing the

distribution system more safety and

reliable.

Accurate cascade coordination

and could be adjusted: the acting current

and acting time of unstream/downstream

circuir-breakers could be installed by

users. So, it is easy to achieve exact

coordination and selective protection.

Comply with the EMC requirements of

GB14048.2 annex J.

Category of 4-pole circuit-breakers










(contact rstly and then opening ).


over-current tri

Documents

Gm8 Manual - Elcb