Air Circuit Breaker Qdw3 Acb

Product Description

QDW3 series universal Air circuit breaker(hereinafter referred to as breaker)is suitable for the circuit of AC 50Hz with rated voltage 400V, 690V and rated current up to 6300A. It is mainly used to distribute electric energy and protect circuits and power-supply equipment from overload, under-voltage, short-circuit and single-phase earthing. with intelligentized and selective protection functions, the breaker can improve the reliability of power supply, and avoid unnecessary power failure. The breaker is applicable for power stations, factories, mines(for 690V) and modern high-buildings, especially for the distribution system of intelligentized building. This breaker conforms to IEC60947-2 and GB14048.2 and CE. Specifications of Q&S brand QDW3 series Intelligent Air circuit breaker

Type			QDW3 -2000	QDW3-3200	QDW3-6300
Pole			3P, 4P	3P, 4P	3P, 4P
Using category			B	B	B
Rated current In		A	630, 800, 1000, 1250, 1600, 2000	2000, 2500, 3000	4000, 5000, 6300
Rated frequency		Hz	50/60	50/60	50/60
Rated operation voltage Ue		V	400 690	400 690	400 690
Rated insulation voltage Ui		V	800	800	800
Arcing distance		mm	0	0	0
Rated impulse withstanding voltage Uimp		V	8000	8000	8000
Rated operation short circuit breaking capacity Ics(O-t-CO-t-CO)	400V	ka	50	80	100
	690V	ka	40	50	75
Rated limiting short circuit breaking capacity Icu(O-t-CO)	400V	ka	80	100	120
	690V	ka	50	65	85
Rated short circuit closing capacity Icm	400V	ka	176	220	264
	690V	ka	105	143	187
Rated short time withstanding current Icw(O-t-CO, AC400V 0.4s)	400V	ka	50	65	85
Operation life	per hour	Times	20	20	10
	Electrical	Times	1000	500	500
	Mechanical	Times	10000	5000	5000
Full breaking time		ms	20~30	20~30	20~30
Full closing time		ms	55~70	55~70	55~70
Power consumption	3P	W	360	1200	2000
	4P	W	450	1750	2300
Resistance of each pole	Fixed type	μ Ω	11	9	-
	Draw out type	μ Ω	20	14	10
Dimensions(L*W*H)	3P fixed type	mm	362*323*402	422*323*402
	3P draw out type	mm	375*461*452	435*471*452
	4P fixed type	mm	457*323*402	537*323*402
	4P draw out type	mm	470*461*452	550*471*452
Approximate weight	3P fixed type	kg	41	55
	3P draw out type	kg	71	95	245
	4P fixed type	kg	51.5	65
	4P draw out type	kg	86	115	260

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