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I have a chiller with three compressors which are started using star/delta starters with open transition. The transition time is 20ms.
The motors are 400V. Two have maximum absorbed currents of 232A, LRA in star of 634A, LRA in delta of 1980A, transition current from star to delta of 1485A; one has a maximum absorbed currents of 281A, LRA in star of 692A and LRA in delta of 2247A, transition current from star to delta of 1685A.
When sizing fuses / overloads / power cables etc, do I need to be mindful of the peak transitional current, or is it not significant since it is only present for such a short time? Should I only consider the actual star or delta currents?
The motors are 400V. Two have maximum absorbed currents of 232A, LRA in star of 634A, LRA in delta of 1980A, transition current from star to delta of 1485A; one has a maximum absorbed currents of 281A, LRA in star of 692A and LRA in delta of 2247A, transition current from star to delta of 1685A.
When sizing fuses / overloads / power cables etc, do I need to be mindful of the peak transitional current, or is it not significant since it is only present for such a short time? Should I only consider the actual star or delta currents?