Most commonly used IEE device numbers used for switchgear

[alaskanassassin]

I am putting together the most commonly used numbers and what I came up with so far are: 27, 43, and 86. Its just for a little cheat sheet for myself. Thanks Doug

 

[zog]

Depends on the class of switchgear but the most common ones off the top of my head for MV/LV switcgear are:

47, 50, 51, 52, 67, 87 (And your 27 and 86)

 

[alaskanassassin]

It is 13.8KV and 480 VAC. Thanks Doug

 

[BJ Conner]

I am putting together the most commonly used numbers and what I came up with so far are: 27, 43, and 86. Its just for a little cheat sheet for myself. Thanks Doug

Here's a list
http://www.fecime.org/referencias/ansi.pdf

The most common though not usually labeled are: 42,51,52,49,62,63, and 86.

 

[zog]

It is 13.8KV and 480 VAC. Thanks Doug

In that case my list would be the most common ones.

 

[cadpoint]

I had no idea what everyone was referencing. (period)

Broading my horizon I came up with and expanded list that explains in detail what was stated by BJ Conner.

Here

Which was based off the search engine results of the title of the OP
IEE device numbers (and functions-which the search added)

 

[zog]

Those are what ll those little numbers mean on a one line drawing.

 

[Thedroid]

I also see 81's on lines with synchronous motors.

 

[SG-1]

I would add 43, 59, & 69 to the list.

 

[kingpb]

25, 27, 59, 81o, 81u, 67, 67n, 50, 50g, 50n, 51, 51g, 51n, 32, 86, 87

 

[RoberteFuhr]

Google it and you'll find complete lists. The first one I found was

http://www.sayedsaad.com/Protection/files/Basic/IEEE device numbers_1.htm