Answer / jim

ultrasonic waves

Answer / r_mujalde

Resonant waves

Answer / rajesh kumar

B. Ultrasonic wave

Why open circuit test of transformers is conducted at rated voltage??Why not any other voltage??

0 Answers  

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how system fault level is calculated?

1 Answers   HCL,

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what is the difference between id fans and fd fans

12 Answers   Perkins Thermal Systems,

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why voltage rating not mention at HPSV or HPMV lamps?

2 Answers   OPS,

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I am having a DG set.The 415 V from Generator is step up to 460 v and then the same is used for Induction furnace. before Step up, I am connecting LT load to my factory use. When Induction furnace is in service from DG, when i try to start a motor, the generator is tripped.Please tell me the reason.

3 Answers  

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why did the BDV test in transformer?

2 Answers   Jindal Steel and Power,

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how to calculate current when LT supply 415v fed to HT Motor 6.6kv and 1120kw.

2 Answers  

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What is the purpose of starter and choke in tube light?

9 Answers   Chimay Brewery, TATA, TSPL,

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redundant connection in contactor?

0 Answers   Emerson,

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suppose generator rating is 50 kw,load is 25 kw,hw much d generator ll generate?what about d remainin power?

2 Answers   NHPC,

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what r the checklist while installing a 380 kva DG set

0 Answers   Pepsi,

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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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