Substation Trip versus Open nomenclature 1

[RSChinn]

In our substations there is mixed nomenclature,including nameplates, over our control switches and pushbuttons. Sometimes it say "Open" and other times it says "Trip". Does anyone have a code, standard, or utility practice on a this? We haven't thought this was a big deal, but somebody questioned it so I thought I would ask it in this forum. Thanks.

 

[rbulsara]

zogzog:

I am not saying they do not exist. All I am saying that there is no real "standard". What you posted is probably an old breaker and is less common. (It even has a very odd Push to close button!). Most new ones in fact says "ON" or "OFF" with symbols of "I" and "O".

By the way, I do agree that"I" is meant for numeral "1" and "O" for "0".

 

[Zogzog]

Here is a current production version of the same breaker. THe only ones with "I" and "O" I have seen is the forgien made insulated case junk.

 

[racobb]

There is one standard we can reference:

Trip/Open - Lights go out
Close - Lights come back on

Alan

 

[rbulsara]

After GE outsources their wavepros (soon), all LV breakers in the USA will be either foreign made or designed! Unless we figure "assembled in the USA" as US made.

 

[Zogzog]

ABB is still making K lines in FL. Powell and CBS make thier VCB's in the US. But they are few and far between.