Gas circuit breaker pressure connection for high and low pressure driers

摘要

The high pressure drier of a two pressure circuit breaker is placed at high pressure only during the time that the compressor is operating. The high pressure of the drier bleeds back to the low pressure system through a calibrated orifice in the oil return line to the compressor. The normal pressure of the high pressure drier is low enough that gas heaters are not needed to protect against liquefaction of sulfur hexafluoride gas.