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Molded Case Circuit Breaker
YEM1(CM1) Moulded Case Circuit BreakersMolded Case Circuit Breakers YEM1 series (hereinafter called as Cm1 MCCB) is a new designedMCCB developed and manufactured adopting international advanced technology.CM1 MCCB rated insulating voltage AC 690V is suitable for using in the circuitof AC 50Hz /60Hz, rated voltage up to 690V, ratedworking current up to 630A to distribute electric power and to protect the line andthe equipment from being damaged due to overload, short current and under-voltage.It can also be used for infrequently switch and starting of motor and formotor overload, short circuit and under-voltage protections. CM1 MCCB with the advantagesof the small volume, high breaking capacity, short over-arcing (some ofspecification is zeroarcing), strong anti-vibration and so on. In accordance with the ultimate short circuitbreaking capacity classified into four types: Type C (basic),Type L (standard),Type M (middle), Type H (high).MCCB comply with the following standards:IEC 60947-1 and GB/T 14048.1 GeneralIEC 60947-2 and GB/T 14048.2 Low voltage breakers.IEC 60947-4 and GB/T 14048.4 Contactors and motor starters.IEC 60947-5.1 and GB/T 14048.5 Electrical equipment of electromechanical controlcircuit.Not over altitude 2000m.Ambient temperature is between-5to+40(+45 for using marine)Withstand the influence of moist air;Smoke fog, salt mist and oil mist;Withstand the influence of fungus;Max. gradient is 22.5Working reliably under the condition of normal vibration in ship;Working in the medium which not any explosive, no enough dielectric to corrode metal,no gas to damage insulation and electric conduction dust.Working in the place would not be inva-ded by rain and snow.Classification according to rated current (A):CM1-63 has nine grades: (6), 10, 16, 20, 25, 32, 40, 50, 63ACM1-100 has ten grades: (10), 16, 20, 25, 32, 40, 50, 63, 80, 100ACM1-160 has four grades: 100, 120, 140, 160ACM1-225 has seven grades: 100, 125, 140, 160, 180, 200, 225ACM1-400 has five grades: 225, 250, 315, 350, 400ACM1-630 has three grades: 400, 500, 630ACM1-800 has three grades: 630, 700, 800ACM1-1250 has three grades: 800, 1000, 1250A [specifications in brackets is not recommend].=The wiring method has four ways: wiring in front of the board, wiring on back ofthe board, insertion type in front of the board and insertion type on back of the board.=According to the over-current release pattern, it would be divided two types: thermo-electromagnetic (double)type and electromagnetic (instantaneous) type.=According to the outfit, it also has two types: with or without outfit. The outfitinclude inner and outside accessories.The inner accessories have shunt release. Under-voltage release. Auxiliary contactand alarm contacts four kinds.The outside accessories are tuning handle operation mechanism, power-driven operation mechanism, inter locking mechanism and the connecting terminal bus bar of auxiliary device.For example:When placing an order CM1-100M, three pole,motor protection, rated current 80A withshunt release,auxiliary contact,front board connection,and two set mechanical interlock mechanism, which can be shortly write: CM1-100M/33402 In=80A, front board connection 2sets mechanical interlock mechanism, release coil voltage:AC220V.=When placing an order for CM1-225, four pole, distribution, rated 180A, and withmotor operation mechanism and shunt release, install over-current release at N-pole, and N-pole and the other three poles is ON=OFF mode,rear board connection 10pcs,which can be shortly write:CM1-225P/4310C, In=180A rear board connection, motor voltage 220V, release coil voltage: 220V.
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