Answer / ruben

UPS has internal bypass and used if in case there is some
problem within the UPS, ie. overload. the load will be
automatically fed from the bypass circuit. the maintenance
bypass is an external circuit or feeder that is use to feed
the load (bypassing the UPS). this will allow the user to
remove completely remove the UPS from the network/system for
maintenance or replacement.

What is mean by hot and cold loop testing?

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why we still use sinusoidal waveforms for transmission and utilisation (we know generation is sinusoidal), instead of other ac waveforms such as triangle, sawtooth, square etc.,? is there any mathematical derivations to prove sinusoidal is efficient than others?

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Main Differance between Primary Distribution & Secondary Distribution Of Electricity....?

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