SDKW1L Residual-Current Circuit Breaker

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SDKW1L residual-current circuit breaker is used for distribution networks with frequency 50Hz, rated voltage AC400V and rated current 800A and below. It can protect human bodies against indirect contact and avoid fire disasters if insulation destruction brings about earthing fault current. It can distribute electric energy, protect circuits, and keep electrical power units from overload and shot circuit. It takes the role of infrequent turn-on and turn-off and infrequent motor start-up. Rated residual operating current I△n and maximum breaking time can be adjusted on site according to actual conditions. If residual current occurs, we can customize a function of alarming, but no tripping.

This series of breaker conforms to standards of IEC60947-2 and GB14048.2.

Product introduction

Technical parameters:

Model		SDKW1L-100			SDKW1L-225			SDKW1L-400				SDKW1L-630, 800
Frame Size Rated Current (Inm)(A)		100			225			400				630, 800
Rated Current (In)(A)		10, 16, 20, 25, 32			100, 125, 140, 160			225, 315				400, 500, 630
		40, 50, 63, 80, 100			180, 200, 225			350, 400				700, 800
Number of Poles		2	3	4	2	3	4	3		4		3		4
Rated Insulation Voltage (Ui)(V)		AC800
Rated Working Voltage (Ue)(V)		AC400
Rated Impulse Withstand Voltage (Uimp)(V)		8000
Flashover Distance		50						100
Breaking Capacity Level		L	M	H	L	M	H	L	M		H	L	M		H
Ultimate Short Circuit Breaking Capacity (Icu)(kA)		30	50	85	30	50	85	50	65		100	50	65		100
Service Short Circuit Breaking Capacity (Ics)(kA)		15	35	50	15	35	50	35	42		65	35	42		65
Rated Residual Short Circuit Making (Breaking) Capacity		8.75	12.5	21	8.75	12.5	21	12.5	13.5		25	12.5	13.5		25
Rated Residual Operating Current (I△n)(mA)	No delay	30/100/500, 100/300/500			30/100/500, 100/300/500			100/300/500				300/500/1000
	Delay	100/300/500			100/300/500			100/300/500				300/500/1000
Rated Residual Non-operating Current (I△n)(mA)		1/21△n			1/21△n			1/21△n				1/21△n
Operating Performance (Number of Times)	Switch on	1500			1000			1000				1000
	Switch off	8500			7000			4000				4000
	Total	10000			80000			5000				5000
Residual Current Operating Time of Protection		I△n			2I△n			5I△n				10I△n
Maximum Breaking Time (S)	No delay	0.2			0.1			0.04				0.04
	Delay	0.5/1.15/2.15			0.35/1/2			0.25/0.9/1.9				0.25/0.9/1.9