1. Overview

The switchgear with high breaking capacity and low values of intercepting VS1 vacuum breaker or VD4 vacuum circuit breaker, reliably prevent wrong operation function, prevent load push, prevent the shake handshandle together when grounding switch is closed circuit breaker, prevent charged, wrongly grounding switch, prevent charged into every " five " interlock function, is a kind of superior performance of the power distribution device.

2. Implementation standards

•GB   3906   3~3 6 KV / AC metal-enclosed switchgear

•GB/T11022     Common technical requirements for high voltage switchgear and control equipment standards

•DL/T404   Indoor   AC   high voltage switch ordering technical conditions