Acronyms for MV Switch Gear

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Goroon

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Investigating MV Transfer issues. Has been awhile.
Does any body have or know where to find a list of the Acronyms for 50, 51, 86 as used in MVSG schematics?:-?
 
Goroon said:
Investigating MV Transfer issues. Has been awhile.
Does any body have or know where to find a list of the Acronyms for 50, 51, 86 as used in MVSG schematics?:-?
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These are acronyms for protective relaying, any manufacturer (Basler, SEL, GE, SQD, ABB) would have a reference.

The most common ones are:
50 instantaneous overcurrent relay (optional N or G)
51 time delay overcurrent relay
86 lockout relay
27 undervoltage relay
 
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