Chiller kVA

[Sparky2791]

Looking for opinion on what to list as the actual running load for this chiller.

My thought is use the 172.8 kW/.8pf x 1.25 for a continuous kVA load.

It appears they established the minimum circuit ampacity of 323A by the following

172,800 / (480*1.73) = 207.8 /.8pf = 259.8 x 125% = 324A (they show 323A)

the .8pf was assumed as it is not listed on the cut sheet.

Curious what others think.

Thanks for looking

 

[tortuga]

Looking for opinion on what to list as the actual running load for this chiller.

Are you trying to figure a transformer size or give the utility a number so they can size the transformer?
or are trying to recalculate the MCA ?

For transformer sizing i'd use this:

Operating Condition Electrical Data
Compressor kW 156.0
Total Fan kW 16.80
Total kW 172.8

For MCA we need to use UL 1995 I think

 

[infinity]

Is there a need to use anything other than what was provided on the cut sheet? Your number and their number are pretty close.

 

[Sparky2791]

Are you trying to figure a transformer size or give the utility a number so they can size the transformer?
or are trying to recalculate the MCA ?

For transformer sizing i'd use this:

For MCA we need to use UL 1995 I think

Actually trying to determine the amount of power it requires as it will be connected to a stand-by emergency generator. It will be on a VFD so starting current is not as much of a concern although still needs to be accounted for. I know its the start up current that really affects the gen size I was really just curious of the actual kw it will take from the generator once the chiller starts and is running. The generator has not been sized yet either

 

[Sparky2791]

Is there a need to use anything other than what was provided on the cut sheet? Your number and their number are pretty close.

I agree. So the maximum running current would be 172.8kW, starting current depends on the type of starter.