Category: Moulded Case Circuit Breakers(MCCB)
VTM1N
VTM1N series moulded case circuit breaker is a new type of circuit breaker developed with international advanced technology platform. It is suitable for power distribution protection in AC 50/60Hz, circuits with the rated working voltage ≤ 690V, and can also be used for occasional circuit switch and startup of motor.
This series circuit breaker is equipped with overload and short circuit protection devices. This series circuit breaker may be installed vertically (i.e., vertical installation) or horizontally (i.e., horizontal installation).
Overview
Working environment conditions:
1.1 Ambient temperature
1.1.1 Normal working temperature is -5°C- +30°C, working temperature limit is -40°C – +70°C.
1.1.2 Derate according to the sample requirements when the temperature is <-5°C or > +30°C (see Table 11 for details).
1.2 Installation category
1.2.1 It is category-III for the main circuit and category- II for remaining auxiliary circuits.
1.3 Pollution class: 3
1.4 Altitude: 2,000 m, derating according to the sample requirements when above 2,000 m (see Table 10 for details).
1.5 Atmospheric conditions
1.5.1 The relative humidity is not more than 50% when the ambient temperature is +40°C;
1.5.2 A higher relative humidity is allowed at the lower temperature.
For example, the relative humidity may be 90% at +20°C. Special measures shall be taken for condensation due to temperature changes.
1.6 Shock and vibration
1.6.1 Withstand mechanical vibration with the frequency of 2Hz-13.2Hz, displacement of ±1mm and mechanical vibration with the frequency of 13.2Hz-100Hz and accelerated velocity of ±0.7g
Main technical performance parameters of electronic Moulded Case Circuit Beaker Series
