1. NF series thermal magnetic type molded case circuit breaker, developed from Mitsubishi type, included NF-CS, NF-SS, NF-CP, NF-SP, NF-HP, NF-CW series.
2. Rated working voltage 690V, 50HZ or 60HZ, and rated working current from 3A to 800A.
3. It mainly used in distributing electric energy and protect the electrical circuit and power equipment from damages caused by overload, short circuit or under-voltage in the distribution network.
4. It complies with IEC60947-2 and GB14048.2 standards.
Working Conditions and Mounting Environments
1. The altitude should be less than 2000m
2. The ambient medium temperature should within -5℃ to +40℃
3. This moulded case circuit breaker is resistant to moisture, salt fog, nuclear radiation, and mildew
4. The maximum tilt angle is 22.5°
5. MCCB can still work reliably if the product is subjected to vibration from ships or earthquakes(4g)
Parameters of NF-250 Moulded Case Circuit Breaker
Frame Current(A) 250 Model NF-250C NF-250S NF-250H Rated Current in(A) 100,125,140,160,180,200,225,250A Poles 3 4 3 4 3 4 Rated Voltage Ue(V) AC400 Rated Insulation Voltage Ui(V) AC690 (KA)AC400 Short-Circuit Interrupting Capacity Icu/Ics 35/18 50/35 80/50 Operation Life(cycle) Power on 3000 Power off 7000 Dimensions(mm) a 105 140 105 140 105 140 b 165 165 165 c 68 68 68 ca 92 92 92 Weight(kg) 1.5 1.9 1.5 1.9 1.5 1.9 Electrical-operation Device(MD) • • • External Rotary Handle • • • Automatic Tripping Device thermal-magnetic thermal-magnetic thermal-magnetic
- Meba Motor Distribution Protection Mccb NF250-CW is update thermal magnetic type mccb max 250A against overload & short circuit.
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