Mimic Control vs Display Control

[Mbrooke]

Would it be wise to do away with rotary switches for breaker, mod and settings control in exchange using LCD display and bay control through SEL 400 series relays? Or keep both?

 

[jghrist]

I would at least keep the rotary breaker control switch so that it is easy to trip the breaker in the case of an emergency.

 

[Mbrooke]

Make sense. What about the MODs?

 

[Electro500kv]

I find most display control unnecessary and needlessly complicates projects. Why do I want more stuff that can fail or puts me further from controlling breakers and switches directly. Unless, there is a complicated scheme justifying it, 99.9% of the time, it adds nothing but more complication.

 

[jghrist]

I'd use rotary switches for MODs as well for consistency.

 

[Mbrooke]

Thank you to Jghrist and Electro500kv!

What about those open/close pushbutton's on SEL's relays? Should I rely on those to any degree?

 

[HamburgerHelper]

Mbrooke,

I would just go with whatever is convention in your facility on push open and close. There is a lot of times logic that supervises a breaker opening or closing. If that is the case, you aren't going to get around operating the breaker without a working relay so using the front push buttons on the relay is not much different than panel buttons or switches.

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If you can't explain it to a six year old, you don't understand it yourself.

 

[Mbrooke]

True.

FWIW, I have both primary and secondary relaying- the idea is that at least one relay will trip out the breaker when it is closed "manually"