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SDKM1 Moulded Case Circuit Breaker

SDKM1 moulded case circuit breaker is a new type of circuit breaker with internationally advanced design and manufacturing technologies. Based on different rated ultimate short circuit breaking capacities (Icu), it has three types: L type (standard type), M type (medium high breaking capacity type) and H type (high breaking capacity type). It features small volume, high breaking capacity, short flashover and anti-vibration. It is ideal to be used on land and ships. The rated insulation voltage is 800V (that of SDKM1-63 is 500V), and it is applicable for circuits with frequency 50Hz, rated current 1250A and rated working voltage AC690V (that of SDKM1-63 is 400V) and below. It can distribute electric energy, protect circuits, and keep electrical power units from overload, short circuit and undervoltage. It can also protect the motor from infrequent start-up, overload, short circuit and under-voltage. When the circuit breaker has 3 poles and the frame size rated current is from 63A to 630A, there is a transparent cover on it for clients to observe the operation inside the breaker at any time.

This breaker can be installed both vertically and horizontally. It conforms to standards of IEC60947-2 and GB14048.2.

Product introduction

Rated values and breaking capacity of circuit breaker:

Model	Frame Size Rated Current (A)	Rated Current (A)	Rated Working Voltage (Ue) (V)	Rated Insulation Voltage (Ui) (V)	Rated Ultimate Short Circuit Breaking Capacity (Icu) (kA) 400/690V	Rated Service Short Circuit Breaking Capacity (Ics) (kA) 400/690	Number of Poles	Flashover Distance (mm)
SDKM1-63L	63	(6), 10, 16, 20, 25, 32, 40, 50, 63	400	500	35	22	3	0
SDKM1-63M	63	(6), 10, 16, 20, 25, 32, 40, 50, 63	400	500	50	25	3, 4	0
SDKM1-100L	100	(10), 16, 20, 25, 32, 40, 50, 63, 80, 100	400/690	800	35/8	22/4	2, 3, 4	≤50
SDKM1-100M	100		400/690	800	50/10	25/5	2, 3, 4
SDKM1-100H	100		400/690	800	85/20	42.5/10	2, 3, 4
SDKM1-225L	225	100, 125, 140, 160, 180, 200, 225	400/690	800	35/8	22/4	2, 3, 4
SDKM1-225M	225		400/690	800	50/10	25/5	2, 3, 4
SDKM1-225H	225		400/690	800	85/20	42.5/10	2, 3, 4
SDKM1-400L	400	225, 250, 315, 350, 400	400/690	800	50/10	35/5	3, 4	≤100
SDKM1-400M	400		400/690	800	65/10	32.5/5	3, 4
SDKM1-400H	400		400/690	800	100/20	50/10	3, 4
SDKM1-630L	630	400, 500, 630	400/690	800	50/10	35/5	3, 4
SDKM1-630M	630		400/690	800	65/10	42/5	3, 4
SDKM1-630H	630		400/690	800	100/20	50/10	3, 4
SDKM1-800M	800	630, 700, 800	400/690	800	75/30	50/15	3, 4
SDKM1-800H	800	630, 700, 800	400/690	800	100	50	3
SDKM1-1250M	1250	700, 800, 1000, 1250	400/690	800	85/25	42.5/12.5	3