Phase loss protection for refrigerated shipping (Reefers)
Phase loss protection for refrigerated shipping (Reefers)
(OP)
Do refrigerated shipping containers usually have built in phase loss protection? We are considering whether to use fuses or a recloser/sectionalizer on the medium voltage side for a 1500 kVA padmount transformer feeding a contain terminal area. If the reefers don't have loss of phase protection, would a shunt trip on the 480V panel make more sense than a 3 phase medium voltage switching device?
An older thread discussed phase loss protection for building loads, but not mobile applications. This is for a USA port, but the reefers are global.
http://www.eng-tips.com/viewthread.cfm?qid=180860
An older thread discussed phase loss protection for building loads, but not mobile applications. This is for a USA port, but the reefers are global.
http://www.eng-tips.com/viewthread.cfm?qid=180860





RE: Phase loss protection for refrigerated shipping (Reefers)
I have seen a lot of reefers that have phase rotation relays and two contactors so that the compressor always runs the same direction regardless of the phase rotation of the feed.
I doubt that these units would start with a phase missing but I am not sure what would happen if a phase was lost when the motor was running.
Bill
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