The vacuum circuit breaker Model ZN20-500 is suitable to exchange 50HZ, the nominal voltage is to 1140 KV. Rated current to the industrial and mining enterprises of 500A, the power plant, the combination of converting station and frequent operation.
Used mainly in the using of protection and control of the electrical apparatus. In being vacuum in stylus for medium, therefore, its volume little, withstand voltage is high, breaking is high in ability, have long performance life, stylus needn’t maintenance, especially because its electric arc is not exposed, safe and reliable advantage, it is industrial sectors such as coal, electricity, chemical industry, metallurgy, petroleum, etc.
Technical parameters:
- Rated operational voltage 1140V,
- Rated operational current 500A,
- Amount shorts out in the breaking current 9KA ,
- Amount shorts out 16 times of number of times of on-off ,
- 3000 times of number of times of the on-off of rated current ,
- 15,000 times of mechanical life,
- Amount tolerates the electric current 9KA in short-term,
- Amount tolerates time 4S in short-term ,
- Specified mains frequency tolerates the voltage 10KV
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