Yueqing City Ousheng IMP&EXP CO.,LTD
- WCM4 MCCB
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- Detailed Description
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\"NS series plastic crust type circuit breaker (called circuit breaker for short hereinafter) is one of newly-developed circuit breakers designed and made by our company, its design embodies updated craft limited-current principle as well as making craft, with compact structure, full modulization, high disjunction, zero flying arc, and other features. Its insulation voltage is 750V， suitable for wires with AC 50Hz, rated working voltage of 690V and below, rated working current of 630A, to work as unfrequent start. Circuit breaker has overload protection, short circuit protection and owe-voltage protection device, can prevent wires and electric source equipments from being damaged.
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\"Circuit breaker accords with IEC60947-1、GB14048.2、GB14048.4 and other standards:
IEC60947-1 and GB/T14048.1 general rules
IEC60947-2 and GB/T14048.2 low-voltage circuit breaker
IEC60947-4 and GB/T14048.4 contactor and starter of motor;
IEC60947-5.1 and GB/T14048.5 mechanical and electrical style control circuit and electrical equipment.
1. Height above sea level :
1.not more than 2000m：
2. Medium temperature around: not higher than +40℃ nor less than -5℃;
3. The places without rain and snow;
4. Pollution grade: 3
5. Installation sort: Ⅲ
6. Be in medium without danger of blast, and the medium is the gas will not rot metal or break insulation or electricity conducting dust;
Basic installation way of circuit breaker is vertical installation, or it can be horizontally installed.\"
Current of release(A) Thermodyamic Release(ambient temp+40℃) Operating Current of Magnetic Release(A)
1.05In(cold state)operative time(h) 1.30In(heat state)operative time(h)
In≤63 ≥1 ＜1 10In±20%
63＜In≤100 ≥2 ＜2 10In±20%
100＜In≤630 ≥2 ＜2 5-10In±20%
Rate Current of release(A) Thermodynamic Release(ambient temp+40℃) Operating Current of Magnetic Release(A)
1.0In(cold state operative time(h) 1.20In(heat state)operative time(h) 1.50In(heat state)operative time(h) 1.01In(heat state)operative time(h)
12.5≤ln≤400 ≥2 ＜2 ≤4min 2S＜Tp≤10S 12In±20%
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