we have one ups its neutral is not earthed.its one
distribution MCB has a earth fault.but we can not put off
any MCB.so how to find out that in which circuit is earthed
without isolating the breaker.
Answer Posted / guest
measure+ve to earth the earthed mcb will show low voltage
than other mcbs
| Is This Answer Correct ? | 2 Yes | 1 No |
Post New Answer View All Answers
how does an encoder work???
WE ARE PLACE A NEW 75 KW MOTOR FOR JPF.IT IS CONNECTED IN M.C.C. WHEN WE ARE STARTING M.C.C.INCOMER IS TRIPPED.THEN WE ARE CONNECTED IN P.C.C WITH A MM30 RELAY PROTECTION THEN WE ARE STARTED MOTOR WILL RUN SMOOTHLY.
which protection function should measure RMS value of current&DFT value of current?
How to see the inductance in a transmission lines
What are the types of excitation system?
What is value of earth resistance required for substation and equipment earthing and what are the reference guidelines
What is mean 2XWY
we have require a Motor (1500kW, 6.6kV, 50Hz) which shall operate at 1500rpm during 30min and after it shall run on 500rpm during 15min. The same cycle shall be repetitive during the whole working days. Which method is best and economic to achieve such type of task. VFD, VVFD, Pole changing motor etc.
I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?
dg earth connect only in the amf panel or not why
What types domain of laplace transforms? What behavior can laplace transform predict how the system work?
What magnetic circuit is formed in berry-type constructions and why?
Define noise?
What is meant by vector group
Is it required to lay 2 runs of GI wires along with armoured cables from one power DB Machines of higher rating?