KNM2 Series High Breaking Capacity Moulded Case Circuit Breaker

The rated insulation voltage of this circuit breaker is 750V which is applicable for theelectricity distribution net of AC 50Hz, rated working voltage 690V and below, rated workingcurrent from 6A to 630A.

Product Details Company Profile

Description

Model NO.: KNM2 Series
Operation: Electric Type
Arc-extinguishing Medium: Air
Structure: Moulded Case Circuit Breaker
Type: Circuit Breaker
Trademark: korlen
Origin: Wenzhou

Breaking Capacity: High Voltage Circuit Breakers
Speed: Normal Type Circuit Breaker
Installation: Fixed
Poles Number: 3
Certification: ISO9001-2000
Specification: IEC60947-2

The rated insulation voltage of this circuit breaker is 750V which is applicable for theelectricity distribution net of AC 50Hz, rated working voltage 690V and below, rated workingcurrent from 6A to 630A. It is used to distribute electric power and protect the line and poweapparatus 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

No.	Testing current name	I/In	Assumed time	Starting situation
1	Assumed untripping 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 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
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	60	60	60	60	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		50%	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
	W	105	105	105	140	140	210	210	210	210
	H	161	161	161	255	255	327	327	327	327
	D	86	86	86	110	110	147	147	147