Answer / arun kr vidyarthi

motoroutputpower-3hp
contactor-16ap
relay-16ap
fuse-6ap

Answer / bsoni

its depending on types of motor ratings
it's available in ratings of ampears

why core is useful for the transformer and in its operation

1 Answers  

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What is voltage divider rule?

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How can we find out LT UG cable fault (size,from-4*25mm sqr to 4*300mm sqr)? How mani types UG cable faults?

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What is the RME and explain the full form and what is the RME work?

0 Answers   JLL,

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how to revers the direction of single phase motor

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why do transformer humm ??????????

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Sir we have 12.5 MVA(110/11KV) transformer (Y-Y) connected,which tripped showing earth fault,when we charged transformer it stood OK ,but on connecting 11 KV feeders it tripped showing earth fault.our service engineers found that the B phase and R phase phase connecting to neutral broken from HV OLTC(on load tap changer),and R phase and Neutral is ok.Dissolved gas analysis shows that accetline content is high,tan delta value is 12.My dout is it is an internal fault of transformer,why REF or diffrential relay is not acted?

1 Answers  

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if a 3phase 100kva distribution transformer , 400 v,50 hz, 4-wire system is loaded at 160 k.w mostly 1-phase Lighting & Airconditioning split a.c load what will be the net effect on the power system in terms of voltage, powerfactor, current , efficiency of xformer

1 Answers  

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What is the permissible sound level for 1000kva DG set and how the sound level is calculated.

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What is over fluxing in transformer?

1 Answers  

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What is difference between VCB and SF6 breaker

4 Answers  

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Anybody know how schematic diagram for reverse power relay? RPR for generator protection

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