Low Voltage Moulded Case Circuit Breaker MCCB KNM2

Low Voltage Moulded Case Circuit Breaker MCCB KNM2

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 KNM1L Moduled Case sircuit Breaker can be installed vertically and horizontally.

This product complies with standard IEC60947-2、GB14048.2.

Parameters & Technical Date

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		KNM2-100N	KNM2-160N	KNM2-250N	KNM2-400N		KNM2-630N	KNM2-800N	KNM2-1000N	KNM2-1250N	KNM2-1600N
Rated current In(A)		16,32,63,80,100	125,160	200,250	350,400		500,630	630,800	800,1000	1000,1250	1250,1600
Rated insulation voltage(V)		750	750	750	750		750	800	800	800	800
Rated pulse voltage(KV)		8	8	8	8		8	8	8	8	8
Rated working voltage ue (V)		AC690	AC690	AC690	AC690		AC690	AC690	AC690	AC690	AC690
Rated working voltage ue (V)		DC500	DC500	DC500	DC500		DC500
Ultimate short-circuit breaking capacity lcu(KA) AC 50/60Hz	220/240V	85	85	85	85		85	50	50	50	50
	380/415V	36	36	36	50		50	50	50	50	50
	440V	35	35	35	42		42	50	50	50	50
	500V	25	30	30	30		30	40	40	40	40
	525V	22	22	22	22		22	40	40	40	40
	660/690V	8	8	8		10	10	30	30	30	30
Operative short-circuit Breaking capacity		75%luc	75%luc	75%luc		75%luc	75%luc	75%luc	75%luc	75%luc	75%luc
Isolation function		■	■	■		■	■	■	■	■	■
Usage category		A	A	A		A	A	B	B	B	B
Machanical life		50000	40000	20000		15000	10000	10000	10000	10000	10000
Electrical life		30000	20000	10000		6000	4000	5000	5000	4000	2000
Outline dimensions(mm)	W	105	105	105		140	140	210	210	210	210
	H	161	161	161		255	255	255	255	327	327
	D	86	86	86		110	110	147	147	147	147