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Sequence for restoring section of bus
2

Sequence for restoring section of bus

Sequence for restoring section of bus

(OP)
For the sake of argument, a section of bus is removed from service. Breakers are opened, disconnect switches are open and associated ground switches are closed. When restoring this bus, i feel ground switches should be opened followed by the closure of the disconnect switches.Is there a standard for doing this? Disconnects or grounds. What's operated first?
Thanks for any help.

RE: Sequence for restoring section of bus

Always off with the grounds first.

RE: Sequence for restoring section of bus

The opposite order used to shut down. Grounds are first things to remove. If you start closing other disconnects first you will close into a ground some day.

I would actually want the ground switches interlocked with the disconnect switches. You can usually use a keyed interlock - one key 2 locks so only one switch can close at a time. It will keep you from closing into a short some day.
 

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