KNM3 Moulded Case Circuit Breaker

The rated insulation voltage of this circuit breaker is 750V which is applicable for the electricity distribution net of AC 50Hz, rated working voltage 690V and below, rated working current from 6A to 630A. It is used to distribute electric power and protect the line and power apparatus from being overload and short-circuit protection of the motor.
This circuit breaker can be installed vertically and horizontally.
This product complies with standard IEC60947-2、GB14048.2

The anti-limit disconnecting movement characteristics of thermal and magnetic release of the breaker applied with power of the breaker for electricity distribution.

No.	Testing current name	I/In	Assumed time	Starting situation
1	Assumed un-tripping current	1.05	2h(In＞63A), 1h(In≤63A)	Cold state
2	Assumed tripping current	1.30	2h(In＞63A), 1h(In≤63A)	Start right after the number 1 test

Type			KNM3-125N	KNM3-160N	KNM3-250N	KNM3-400N	KNM3-630N	KNM3-800N	KNM3-800N
Rated current In(A)			125A	160A	250A	400A	630A	800A	1250~1600A
Rated insulation voltage(V)			500	690	800	800	800	800	800
Rated pulse voltage(KV)			6	6	8	8	8	8	8
Rated working voltage ue (V)			AC500	AC690	AC690	AC690	AC690	AC690	AC690
Rated working voltage ue (V)			DC250	DC500	DC750	DC750	DC750	DC750	DC750
Ultimate short-circuit breaking capacity lcu(KA) AC 50/60Hz		220/240V	40	50	65	65	65	65	85
		380/415V	25	35	35	35	35	35	50
		440V	16	20	30	30	30	30	40
		500V	12	12	25	25	25	25	35
		690V	-	8	14	20	20	20	20
Operative short-circuit Breaking capacity			50%luc	75%luc	75%luc	75%luc	75%luc	75%luc	75%luc
Isolation function			■	■	■	■	■	■	■
Usage category			A	A	A	A	A	B	B
Mode of tripping unit	Unadjustable		■	■
	Adjustable thermal trip Unadjustable electromagetic trip				■	■
	Unadjustable				■	■	■	■	■
Machanical life			25000	25000	25000	20000	20000	20000	10000
Electrical life			8000	8000	8000	7000	5000	5000	5000
Outline dimensions(mm)		L	78	90	105	140	210	210	210
		D	70	70	103.5	103.5	103.5	103.5	138.5
		H	120	120	170	254	268	268	406

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