How to know Motor Starter dimensions for a MV Motor Control Center?

[Dvhez]

Hi everyone. I want to estimate the free space of a vertical section (90 inches or 2300 mm approx) that a motor starter would use if it's installed inside a Medium Voltage MCC. Is there a standard or something to refer to? For example, how many columns should I need to feed 4 different motors: 4000 kW, 1500 kW, 600 kW and 100 kW (to say something) connected at 4.16 kV

 

[waross]

Have you checked the catalogue?
There is often a spacing chart in the technical section.

Bill
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"Why not the best?"
Jimmy Carter

 

[LionelHutz]

There is no standard. Full voltage could vary from something like 18" to 30" wide per starter. 2-high full voltage starters could be 30" or 36" wide. For soft-starters expect 36" wide per starter.

 

[jraef]

Looked at another way; nobody makes an MV MCC that offers more than two starters per section (2-high). But if there is anything else in those units besides the contactors and fused disconnects, you may not be able to use 2-high options, so it becomes one starter = one structure.

This is the North American standard by the way. IEC control gear is very different. They usually favor single starter structures but in narrower format with the components mounted at right angles to the bus structure, pulling out like a closet for access.
NEMA:

IEC:

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