I have a client who owns some aircraft hangars. While preparing to do a 480v 3-phase service upgrade to the hangars, the client has requested to include 3 hook up locations for a frequency converter (The converters have an input of 64-amps at 480v 3ph) to power the aircrafts during service.
With out upgrading the service to more than 200-amp 480v (would require a new conduit and wire from utility transformer to existing service). My total connected load with existing and requested additional loads, would only have room on the 200-amp 480v service for 1 converter which would bring my connected load to 159-amps at 480v.
They are requesting 3 hook up locations at different spots around the hangar understanding only 1 converter can be brought in.
My question would be, if its known that only 1 converter will ever be connected at one time, am I able to run each hook up location as its own seperate circuit as coincedental loads and only apply the connected load one time in my service load calculation. Or would I need to only have 1 breaker for the converter and one hook up location if we can only include the 1.
With out upgrading the service to more than 200-amp 480v (would require a new conduit and wire from utility transformer to existing service). My total connected load with existing and requested additional loads, would only have room on the 200-amp 480v service for 1 converter which would bring my connected load to 159-amps at 480v.
They are requesting 3 hook up locations at different spots around the hangar understanding only 1 converter can be brought in.
My question would be, if its known that only 1 converter will ever be connected at one time, am I able to run each hook up location as its own seperate circuit as coincedental loads and only apply the connected load one time in my service load calculation. Or would I need to only have 1 breaker for the converter and one hook up location if we can only include the 1.
