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

in 132kv substation CRT means

0 Answers  

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234 MVA Generator 3 phase Short circuit current Values required? Gen set Rating-234 MVA, Gen Voltage-18kv, PF;0.8, Xdv:23.5 %, Transformer Rating-18/380KV, 680MVA,Yndd1 two winding, Step up TR, ZT:35.50 %,X/R 4.33 Gen CB Position, CB open ,Disconnected open, Generator Running Voltage 18 Kv, Bi mistakes generator side earth switch Closed during that time short circuit current level in 3 Phase required, and how to test on site 234MVA Generator Short circuit current,

0 Answers   Jomel,

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Is ground earthing required for neutral conductor of a prime mover ie DG set?

1 Answers  

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What should be setting for alarm,tripping and cooling fan on for power transformer's oil temp. and winding temp. indicator?

0 Answers  

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documented proof that aluminium bus bars are better than aluminium cables

0 Answers  

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What is the difference between in Fourier series and Fourier Transform. and please tell me the difference between both of them and the why we use them in communication system?

0 Answers  

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Distinguish between shunt and series field coil constructions.

2 Answers   BEL,

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What is a pulse transformer?? Can it be called as a dc transformer??

1 Answers  

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What is the IS standard for MCCB to be use (As per capacity of AMP)& for ACB also.

0 Answers  

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what is effect of leading power facter on the system and billing

0 Answers   TATA,

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When we change the tap position of 10MVA transformer it suddenly tripped with Out of step indication and also with Static differential relay indication, Transformer Bucholz relay indn and Low oil level indication. Before 1 week the same problem occured by changing the tap position. but at that time only oltc bucholz relay activated. After testing the TxR Relay team & PET team cant find any solid reason. The values are ok also. So plz answer wat's the reason for this incident? anybody plz help.

3 Answers  

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what are fluorescent lamps (fluorescent fixtures) & what are incandescen lamps (incandescents fixtures) ? differences between these two ?

1 Answers  

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