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Item Nunber & Product Name:GTMAL
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  • Description
Application
GTMA1 moulded case low-voltage circuit breakers is characterized by high quality, reliability, and
performance under all conditions, simplicity of installation and safety of operation. It can be used for
motor protection, switch-disconnecting, circuit-breaking, and residual current circuit breaking, as well as
specific ranges (for motor protection and switch-disconnecting) complying with the standard of IEC60947-1,
IEC60947-2, IEC60947-4-1.
This MCCB can be mounted in primary (Power Center) or secondary (Panel Board) distribution
switchboards, for motor protection and control (Motor Control Center), in generators and for end users.
Their performances are, however, of particular interest where critical situations arise (very high rated
and fault currents), or where complex plant engineering solutions are needed (special coordination
requirements and plant automation). They also guarantee total selectivity of the protections up to full
breaking capacity of the circuit-breaker installed on the load side.
□ Protection and control in installations for electric traction
□ Particularly severe environmental conditions such as mines and
steelworks
□ Refineries and chemical plants as well as gas pipelines, water
pipelines.
□ Installation on-board ships
□ Offices, theaters, shopping malls and residential complexes
□ Underground railway stations
□ Off-shore drilling rigs
Connection type of circuit breaker
Normal working environment
□ Ambient air temperature : -5℃~+40℃
□ Resistance to salt spray and oil spray
□ Ambient environment/medium free from explosive danger,
air or conductive dust which may cause corrosion of metal
or influence the stability of installation
□ Altitude : ≦2000m

GTMA1
Moulded case circuit breaker

Class of breaking capacity B N B N
Frame rated current Inm 160 200
Rated current In 12.5 16 20 25 32 40 50 63 80 100 125 160 12.5 16 20 25 32 40 50 63 80 100 125 160 200
Rated insulating voltage Ui 500V 500V
Rated operating voltage Ue 230V 400V
Number of poles 1 2
N-pole rated current =In =In
Rated ultimate short-circuit breaking capacity kA Icu AC 400V/50Hz O-CO 25 35 25 35
Rated operating short-circuit breaking capacity kA Ics AC 400V/50Hz O-CO-CO 18.75 27 18.75 27
Rated short-time withstand current for 1s kA Icw AC400V/50HZ 40/0.3 40/0.3
Rated impulse withstand voltage Uimp V 10000 10000
Life Total times Electrical life Mechanical life 20000 15000
Flashover distance mm 3000 2500
Release Thermal magnetic release 17000 12500
Electronic release ≤30/0 ≤30/0
Usage category Main circuit A/0 A/0
Accessorial circuit & control circuit AC-15 AC-15
Dimensions

W (mm)     3P 4P

30(1P) 60(2P)
L(mm)      3P 4P 120 120
H(mm)      3P 4P 70 70
Weight Fixed      3P 4P 0.92/1.3 0.92/1.3
Plug in      3P 4P
Withdrawable      3P 4P


B N B N S N S H X N S H N S H X S H
125 160 250 400、630 800 1250、1600
12.5 16 20 25 32 40 50 63 80 100 125 32 40 50 63 80 100 125 160 125 160 180 200 225 25 250 315 350 400 500 630 400 500 630 700 800 800 1000 1250 1600
500V 690V 690V 690V 690V 690V
400V 400V 400V 400V 400V 400V
3/4 3/4 3/4 3/4 3/4 3
=In =In =In =In =In =In
20 35 25 35 50 35 50 65 100 35 50 65 35 50 65 100 50 65
10 17.5 18.75 27 35 37.5 48.8 75 35 37.5 48.8 35 37.5 48.8 75 50 48.75
5 10 20
6000 8000 8000 8000 8000 8000
10000 8000 8000 5000 5000 3000
1500 1000 1000 1000 1000 500
8500 7000≤30/0 7000 4000 4000 2500≤30/0
≤30 ≤30 ≤50 ≤50 ≤80 ≤80
A A A A,B A,B B
AC-15 AC-15 AC-15 AC-15 AC-15 AC-15
76 76 90 90 90 105 105 140 210 210 210
101 101 120 120 120 140 140 184 280 280 280
120 120 120 120 120 120 120 120 120 120 170 254 170 254 254 254 268 406 268 406 406 406
70 70 70 70 70 70 79 70 70 79 103.5 103.5 103.5 103.5 103.5 103.5 103.5 103.5 103.5 103.5 138.5 138.5
0.92/1.3 1.2/1.6 2.7/3.5 5 5.1/7
1.2/1.5 1.4/1.8 3.2/4.2 8.2 6.2/8.5
3.6/4.6  9 6.5/8.7 12.2/15.3 22/30.1

Protection characteristic
1.Variable parameters of thermal overload protection current setting
2.Characteristics of Thermal magnetic Over-current release
3.Characteristics of inverse time delay thermal releaseping-Ranges of current settings of thermal inverse time delay
Fram rated current size Im(A) Circumstance temperature Rated current Current settings of inverse time delayN S H X Adjustable Instantaneous Current (A) Instantaneous releaseping Current In
+10°C +20°C +30°C +40°C +50°C +60°C 40°C Setting lrl 5In 7.5In 10In
A/B/C Phase N Pole
125 1.19 1.03 1.06 1.0In 0.93 0.87 12.5A 12.5A 12.5A 500A
20A 20A 20A 500A 10
25A 25A 25A 500A 10
32A 32A 32A 500A 10
40A 40A 40A 500A 10
50A 50A 50A 500A 10
63A 63A 63A 630A 12
80A 80A 80A 800A 12
100A 100A 100A 1000A 12
160 1.15 1.10 1.05 1.0In 0.94 0.88 125A 125A 125A 1250A 12
32A 22.4~32A 22.4~32A 500A 10
40A 28~40A 28~40A 500A 10
50A 35~50A 35~50A 500A 10
63A 44.1~63A 44.1~63A 630A 12
80A 56~80A 56~80A 800A 12
100A 70~100A 70~100A 1000A 12
125A 87.5~125A 87.5~125A 1250A 12
250 1.14 1.10 1.05 1.0In 0.95 0.87 160A 112~160A 112~160A 1600A 12
125A 87.5~125A 87.5~125A 1250A 12
160A 112~160A 112~160A 1600A 12
180A 126~180A 126~180A 1800A 12
200A 140~200A 140~200A 2000A 12
225A 157.5~225A 157.5~225A 2250A 12
400 630 1.13 1.11 1.04 1.0In 0.92 0.85 250A 175~225A 175~225A 2500A 12
250A 175~250A 175~250A 1250 1875 2500 2500A 12
315A 220.5~315A 220.5~315A 1575 2363 3150 3150A 12
350A 245~350A 245~350A 1750 2625 3500 3500A 12
400A 280~400A 280~400A 1750 2625 4000 4000A
500A 350~500A 350~500A 2500 3750 5000 5000A
630A 441~630A 441~630A 3150 4725 6300 6300A
800 1.10 1.08 1.03 1.0In 0.84 0.77 400A 400A 400A 4000A
500A 500A 500A 5000A
630A 630A 630A 6300A
700A 700A 700A 7000A
800A 800A 800A 8000A
1250 1600 1.08 1.06 1.02 1.0In 0.8 0.73 800A 800A 800A
1000A 1000A 1000A
1250A 1250A 1250A
1600A 1600A 1600A

Accessory Code Accessory Installation and lead cable method
Name of Accessories Thermal magnetic Release Duplex Release GTMA1-125 GTMA1-160 GTMA1-250 GTMA1-400 GTMA1-630 GTMA1-800 GTMA1-1250 GTMA1-1600
Alarm Contact 208 308 3P、4P 3P、4P 3P、4P 3P、4P
Shunt release 210 310
Shunt Release Alarm Contact 218 318
Auxiliary Contact 220 320
Auxiliary Contact Alarm Contact 228 328
Under voltage release 230 330
Under voltage release Alarm Contact 238 338
Shunt release Auxiliary Contact 240 340
Shunt Release Under voltage release Two-sets Auxiliary Contact 248 348
Two-sets Auxiliary Contact 260 360
Two-sets Auxiliary Contact Alarm Contact 268 368
Under voltage release Auxiliary Contact 270 370
Under voltage release Auxiliary Contact Alarm Contact 278 378


■ Shunt release
■ Auxiliary contact & warning contact
■ Under-voltage release

63A-160A under-voltage inlay release

63A-160A under-voltage release

250A-400A under-voltage release

630A-1600A under-voltage release

Motor Operator □
Motor operator
1. Motor operator is used to remote control the closing of the breaker
2.The specification of motor operator
Frame rated current Model of motor operator
CD1 CD2 CD3
125A CD2-125
160A CD2-125
250A CD1-250
400、630A CD1-400CD1-630
800A CD3-800
1600A CD3-800

□ CD1 direct action motor operator
The accessory of electric operation The range of operating voltage motor operation device (0.85-1.1)XUs
Rated control voltage Power supply AC 50 Hz 220V 380V
Power consumption Start Power consume 510VA 510VA
Continuance Power consume 360VA 360VA
DC 110V 220V
Power consume Start Power consume 510W 510W
Continuance Power consume 360W 360W
Close time 0.1s
Close time 0.1s

The accessory of electric operation The range of operating voltage motor operation device (0.85-1.1)XUs
Rated control voltage Power supply AC 50 Hz 220V 380V
Power consumption Start Power consume 220VA 200VA
Continuance Power consume 110VA 110VA
DC 110V 220V
Power consume Start Power consume 200W 200W
Continuance Power consume 110W 110W
Close time 0.1s
Close time 0.1s

The accessory of electric operation The range of operating voltage motor operation device (0.85-1.1)XUs
Rated control voltage Power supply AC 50 Hz 220V 380V
Power consumption Start Power consume 660VA 660VA
Continuance Power consume 180VA 180VA
DC 110V 220V
Power consume Start Power consume 600W 600W
Continuance Power consume 180W 180W
Close time 0.1s
Close time 0.3s
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