Relay protection operation power automatic switching circuit
Source: InternetPublisher:奥特man123 Keywords: Power supply relay protection automatic switching switching circuit Updated: 2020/11/03
When there are two independent power supplies in the substation, the relay protection operation power supply as shown in the figure can be used to automatically
switch lines to replace the battery pack.
In the figure, TV is a voltage transformer for relay protection ; KA is an AC voltage relay, DY-28 type/loOv, set
to 80V release; fuses FUi and FUz are used to prevent the contactor contacts from sticking for short-circuit protection designed.
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