I can recommend the selection of a single phase remote refrigeration compressor power pack, or a three phase version. The single phase has voltage requirement of 208-230V at an RLA of 6.3A and the three phase voltage requirement of 208-230V at an RLA of 4.2A.
I am already using a single phase transformer to get 115V for my control circuitry, so I could upsize the transformer and use the center tap to get 115/230V. Alternatively I could use a single 1kVA transformer as usual for my control circuit, and buy a separate single phase or three phase transformer for remote refrigeration unit.
The remote refrigeration unit will be started across-the line. Would it be best to separate the transformers for this? Everything on the transformer 115/230V secondary would experience a voltage drop when the compressors started at the remote unit, right?
Also, does the "rule of thumb" for the sizing of transformers based off of 3 KVA for every HP apply to both single phase and three phase loads? From what I can tell, the three phase compressors have larger LRA's (usually around 6-8 times RLA) than the single phase (usually around 5-6 times RLA).
Also, should I be using HP here? I know refrigeration compressors are different than standard motors, and the RLA is not FLA. Should I size the transformer from the max operating current of the remote refrigeration units compressors?
I am already using a single phase transformer to get 115V for my control circuitry, so I could upsize the transformer and use the center tap to get 115/230V. Alternatively I could use a single 1kVA transformer as usual for my control circuit, and buy a separate single phase or three phase transformer for remote refrigeration unit.
The remote refrigeration unit will be started across-the line. Would it be best to separate the transformers for this? Everything on the transformer 115/230V secondary would experience a voltage drop when the compressors started at the remote unit, right?
Also, does the "rule of thumb" for the sizing of transformers based off of 3 KVA for every HP apply to both single phase and three phase loads? From what I can tell, the three phase compressors have larger LRA's (usually around 6-8 times RLA) than the single phase (usually around 5-6 times RLA).
Also, should I be using HP here? I know refrigeration compressors are different than standard motors, and the RLA is not FLA. Should I size the transformer from the max operating current of the remote refrigeration units compressors?
