Sm8 Series Moulded Case Circuit Breakers

1.Application
SM8 series MCCB is one of new products developed and manufactured by adopting international advanced technology. It is supplied with rated insutating voltage 690V and used for circuit of AC 50/60Hz, rated operating voltage AC 415V or below, rated opereating current from 16A to 630A. It is designed for protection of electric circuit, motors, transformers and other equipments. The products conforms to IEC60947-2 standard.

2. Specification

Type SM8-160X SM8-160 SM8-250 SM8-400 SM8-630 Poles number 3 3 3 3 3 Rated current In(A) 20~160A 50~160A 100~250A 200~400A 315~400A Rated operating voltage Ue(V) AC 50/60Hz 690 690 690 690 690 Rated insulation voltage Ui(V) 800 800 800 800 800 Rated impulse withstand voltage Uimp(KV) 8 8 8 8 8 Utilisation category A A A A A Rated ultimate short-circuit breaking capacityIcu(KA) AC 220/240V 65 65 65 65 65   AC 380/415V 40 40 40 40 40   AC 690V 8 12 12 12 12 Rated short-circuit servicebreaking capacityIcs(KA) AC 220/240V 65 65 65 65 65   AC 380/415V 40 40 40 40 40   AC 690V 4 6 6 6 6 Thermomagnetic T(thermal) M(maghetic)   SM8-160X SM8-160 SM8-250 In T adjustable (0.8~1.0In) M fixed In T adjustable (0.8~1.0In) M adjustable In T adjustable (0.8~1.0In) M adjustable 20A 16~20A 300A 50A 40~50A 300~600A 200A 160~200A 1000~2000A 32A 25~32A 300A 63A 50~63A 300~600A 250A 200~250A 1200~2500A 40A 32~40A 600A 80A 63~80A 400~800A       50A 40~50A 600A 100A 80~100A 500~1000A       63A 50~63A 600A 125A 100~125A 625~1250A       80A 63~80A 1000A 160A 125~160A 800~1600A       100A 80~100A 1000A             125A 100~125A 1000A             160A 125~160A 1500A               SM8-400 SM8-630 In T adjustable(0.8~1.0In) M adjustable In T adjustable(0.8~1.0In) M adjustable 200A 160~200A 1000~2000A 315A 250~315A 1575~3150A 250A 200~250A 1200~2500A 400A 315~400A 2000~4000A 315A 250~315A 1575~3150A 500A 400~500A 2500~5000A 400A 315~400A 2000~4000A 630A 500~630A 3250~6500A 3. Outline and Installation Dimension