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GYCM3E Series Electronic Circuit Breaker

GYCM3E series electronic circuit breakers(hereafter simply referred to as circuit breakers) are one of the new type breakers which have been developed using international advanced design and manufacturing technology. The rated insulation voltage of the breakers is 800V. In the circuit of AC50Hz, the rated working voltage 690V or bellow and the rated working current up to 800A, the breakers are suitable for infrequent turn-on or turn-off and infrequent motor starting-up. The breakers have overload long-time-delay inverse, short-circuit short-time delay, short-circuit instantaneous and under-voltage protection performances, so as to protect the circuit and the power equipment from damage. Circuit breaker protection features complete and accurate, can improve the reliability of power supply and avoid unnecessary power failures.


Download GEYA CYCM3E MCB catalog



·Ambient temperature :-5℃~+40℃.
·Elevation of installation site:≤2000m.
·Relative humidity: not exceeding 50% at the maximum ambient temperature of +40℃. With the lower temperature, higher humidity would be permitted. E.g. when the relative humidity is 90% at the ambient temperature of 20℃,special measures should be taken to solve the dews on the surface, which would appear due to the temperature change.
·Pollution protection: 3 grade.
·Breakers pass the GB/T2423.10 which can tolerate the mechanical vibration(frequency:2Hz~13.2Hz,displacement:±1 and frequency:13.2Hz~100Hz,acceleration:±0.7g).
·Installing categories: III for the main circuits; II for auxiliary circuit and control circuit without connecting with the main circuit.
·Breakers can be used in electromagnetic environment A.
·Humid and tropical type (TH)breakers pass the GB/T2423.4, which can tolerate the Influence of damp air、salt mist、oil mist and mould.
·Breakers should be installed in the place without any explosive medium,conductive dust and can not corrode metal and destroy the insulation.
·The place would not be invade by rain and snow.
·Storage condition: Ambient temperature is -40℃~+70℃.


GYCM3E series electronic circuit breaker main technical-performance index
Frame current Inm(A) 125 250 400 800
Type GYCM3E-125 GYCM3E-250 GYCM3E-400 GYCM3E-800
Pole   number   3 4 3 4 3 4 3 4
Rated current In(A)  32(12.5~32)
250(100~250) 400(160~400) 630(250~630)
Rated insulation voltage Ui(V) AC800 AC800 AC800 AC800
Rated impulse voltage Uimp(V) 8000 8000 8000 8000
Rated working voltage
AC400 AC400 AC400 AC400
Arc-over  distance(mm) ≯50(0)² ≯50(0)² ≯100(0)² ≯100(0)²
Limiting short-circuit
breaking ability lcu(kA)
50 50 65 75
Operating short-circuit
breaking ability Ics(kA)
35 35 42 50
Rated    short-time    withstand    current    lcw(kA)/1s 5 10
Utilization category A A B B
Electrical durability (times)1) 8000 8000 7500 7500
20000 20000 10000 10000
Maintenance 40000 40000 20000 20000
Width 92 122 107 142 150 198 210 280
Length 150 165 257 280
Height 92 90 106.5 115.5
1)For GB14048.1, the term”durability”expresses the expectancy of the number of operating cycles which can be performed by the equipment before repair or
replacement of parts.
2)Can be zero arcventing by installing arc cover of

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