Buchholz relay is used ………. a) protection T/F b) oil T/F c) Air core T/F

8 Answers   Engineers India Limited,

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Why we use less dia. fuse and conductors at H.T. side, although we use higher dia. cables on L.t. side?

4 Answers   RRB,

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Transformer TTR test procedure

2 Answers   Descon,

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WHAT IS THE THUMB RULE FOR DECIDING THE CURRENT RATING OF COPPER WIRES SAY 2.5/4/6/10 MM SQUARE SIZES??

14 Answers   Dubai Group, Saudi Delta Groups, Savitha Electricals,

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What is difference between ON delay and OFF Delay Timer?

7 Answers  

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why the colour of insultor stack , petticoat is brown. Is it has some technical reason.

0 Answers  

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why neutral used in three phase motor connection?

3 Answers   BEL,

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what is the formula to find out how many amps generater takes running on full load.

4 Answers  

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In star and delta connected systems , for driving power and as well as light load which one you will preferred?

2 Answers   Aramco, IBM,

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We are installing a 1.6 MVA transformer at our crusher plant and the feeder of HPSEBL is 2 km away at substaion . and a VCB is installed in the substaion which is 2 km away from transformer so we need another VCB near the transformer.

2 Answers   SCPL,

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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.

3 Answers   CFCL,

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7- What is the Dissipation Factor and the difference between it and Insulation Resistance Test? 8- What is the task (function) of DC and AC reactors in power plant? 9- What is the task (function) of (open delta with earthed) in some types in transformers? 10- What is the base of the selection of the vector group in transformers? 11- What is the zig-zag transformer and its function by drawing in large detail? 12- What is the polarity ? 13- Why we make short between phase(R) in high side and phase (r) in low side in vector group test? Where High Side ( R ,S and T ) and Low Side ( r ,s and t ). 14- What are the time on delay and time off delay? 15- What is the vector group? 15- What is the task (function) of different types of vector group such as Dyn11 , Dd0 , YNd1,……..,?

0 Answers  

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