RCS900线路保护电压切换回路的改进

Improvements on Voltage Switching Circuit of RCS900 Line Protection

针对RCS900线路保护装置电压切换回路在系统倒闸操作过程中,引入的隔离开关辅助接点接触不良,可能引起电压切换箱烧毁,造成向TV二次反充电烧毁其二次线圈的现象,提出了电压切换回路改进方案。方案经工程实践证明可有效避免上述现象的发生,进而提高了RCS900线路保护装置运行的可靠性。

In the voltage switching operation of RCS900 line protection devices, if auxiliary contacts of the cited disconnecting switches did not contact well, the voltage switching box could burn down and caused the reversed charging of TV, then the secondary coil of TV could also burn down. Aimed at this phenomenon, improving scheme of voltage switching circuit was proposed. Engineering practice proved that the scheme could avoid the phenomenon effectively thus the reliability to that protection device was enhanced.