Answer / prakash

UPS Paralleling means distribution of load between two or
more UPS'. Or you can use one as backup or stand by ups.

While paralleling the UPS, one must check following,

Input Voltage, Neutral to Earth Voltage, Neutral earthing
etc.

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Dear All, In a 400V power system, ratio of three current transformers installed incoming switchgear is 4000/1. Maximum three phases short circuit current of this system is 48kA. One CT is installed on neutral of upstream transformer (6/0.42kV, solidly earthed) for 51G protection. Would you please inform me about the correct CT ratio of this current transformer (on neutral)?? Thanks a million

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