7 MVA Sub station

Ainsley Whyte

Senior Member
Location
Jamaica
Occupation
Senior Electrical Engineer
Is substation size similar to breaker size that required round up to nearest number ?

I am interesting in a 7 MVA substation.
 

petersonra

Senior Member
Location
Northern illinois
Occupation
engineer
Is substation size similar to breaker size that required round up to nearest number ?

I am interesting in a 7 MVA substation.
Substations are usually not covered by the NEC since they are mostly owned by the utility.

Incidentally, there is no requirement in the NEC to round up to the next rating. It is a design choice where allowed.
 
When you get to that size, the components might be off-the-shelf but the sizing, arrangement, and settings are very much engineering choices. It also could well require more complex protection than a simple overcurrent circuit breaker.
 

jim dungar

Moderator
Staff member
Location
Wisconsin
Occupation
Retired Electrical Engineer - Power Systems
Substations are usually not covered by the NEC since they are mostly owned by the utility.
Many industrial facilities own their substations, especially those with large power demands and campus style distribution needs.
 
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