GAS SUPPLY SYSTEM FOR GAS BLAST CIRCUIT BREAKER

摘要

An air blast circuit breaker requires two constantly available supplies of compressed air, one at low pressure (370 psi) and the other at high pressure (1,500 psi). An air compressor takes air at atmospheric pressure, compresses it to 500 psi, and supplies it through an air drier to a first stage reservoir or receiver. Air is supplied on demand from the first stage reservoir to replenish a second stage reservoir or receiver which supplies the low pressure air to the breaker. Air is also supplied on demand from the first stage reservoir to operate and to feed a booster pump which compresses the feed-air from 500 psi to 1,500 psi and replenishes a third stage reservoir or receiver which supplies the high pressure air to the breaker. Exhaust operating air from the booster pump is supplied to the second stage reservoir. After use in the breaker, the air is exhausted to atmosphere.