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220kV及以上变电站站用400V交流系统,当备供电源开关合闸启动时间继电器SJ回路中采用主供电源开关的常开接点时,SJ的延时整定得合适与否直接影响到当主供电源开关无故障跳闸后备供电源开关能否安全、成功地自投。本文结合有关时序图,重点讨论这个问题。
220V and above substations with 400V AC system, when the standby switch for power supply switch-on time relay SJ circuit using the main power switch normally open contacts, SJ delay set properly or not directly affect the main power switch Trouble-free trip backup power switch can be safe, successfully from the vote. This article combines the timing diagram, focusing on this issue.