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KNM3 Moulded Case Circuit Breaker

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  • KNM3
  • Korlen

    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(In63A),
1h(In≤63A)
Cold state
 
2
Assumed tripping current 1.30 2h(In63A),
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
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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Tel: 0086-577-62207777 / 62870277
Add: NO.258 Weiershi Road,Yue Qing Economic & development Zone(yanpan),zhejiang China
E-mail: korlen@korlen.com
Fax: 0086-577-62661666

Circuit Breaker

Low Voltage

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