Grid charging on Blue Phase only
I'm currently installaing 2 x 12 KW 3-Phase systems in parallel. I commissioned the system with a 50 AMp 3-pole MCB and to my surprise the customer called me after I left site to tell me the MCB keeps tripping. This made no sense as I has limited the charge rate 100 Amps per inverter. On further investigation I tested the phases feeding the inverters and noticed the blue phase jumping from 13 Amps to 61 Amps, hence the reason for the tripping. Switching load off I measure 29 and 21 Amps on each inverter on the blue phase only. No power being pulled on the other two phases. Is this normal behaviour as I had expected all three phases to pull evenly for battery charging ?
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Glad to hear it is working.