Answer / perwez

when there is a problem with the inventer or when v r are
doing any maintenance that time we bypass the supply, which
means the ups act's as direct supply , if there is power
failure in this case ups will not feed any power.

Answer / ramendra shukla

At the time of abnormal condition,testing or Maintenance
we can put our UPS as on Mannual By-pass mode.
it can also happens when By pass switch or auto control
operation has been failed.

Answer / sumit

for maintenance purpose
to bypass ups from main line

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