LV Switchboard schematic

[kookypedia]

Hi guys,
Is there any difference in the schematic diagram for a typical 480V switchgear Vs. 480V switchboard?

 

[jraef]

In the case of low voltage gear used in North America, the term Switchgear is generally used to describe "Metal-Clad" or "draw-out" gear conforming to ANSI C37 (UL 1066) and UL 1558, where the individual breakers are in separate compartments or "cells", each of which can be drawn out from the bus and locked out in that position when performing maintenance. Anything else, ie where the breakers or fused disconnects are all in one big structure together is called a Switchboard (or even a Panelboard) conforming to UL 489 and UL 891.

So from a drawing standpoint, you would show the stab assemblies on the line and load side of the switchgear cell units,

But generally, the individual units in a switchboard would be shown as directly bolted to the bus as a group.

"You measure the size of the accomplishment by the obstacles you had to overcome to reach your goals" -- Booker T. Washington

 

[krisys]

From the single line diagram or schematic diagram it may not be possible to tell exactly, whether it is for switchboard or for switchgear. The construction specification should specify this and the General arrangement (GA) drawings should be able to tell whether it is switchboard or switchgear.

 

[kookypedia]

I mainly meant, is there any difference in their controls?
for example, I usually see MOC (mechanism operated contact) and TOC (truck operated contact) in switchgear but I don't know if we have these in switchboard too?

 

[davidbeach]

TOC will not exist in switchboard construction as there is no "truck" or draw out mechanism. With only MOC contacts in switchboard construction there is no need to distinguish between MOC and TOC.

 

[kookypedia]

Thank you all!