why impudance relay used for medium transmission power system? why not others?

0 Answers  

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why transmission line towers are longer than communication line towers?

3 Answers  

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all 3 current transformers (C.T) are burnt in a L.T Panel - what are the possible reasons

5 Answers  

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can any one suggest websites having study maetrials for the electrical students?

1 Answers  

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DC Motors applications used in Lift/Elevators

8 Answers   IOCL, SCS, Usha Martin,

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In some countries it is found that an Earthing Transformer is connected at the LV sides of the Transmission and Distribution Substation Transformers.Actually what is the purpose the Earthing Transformer?

1 Answers  

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What is the ampereage of .75 ton Ac

1 Answers  

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how earth resistance can be improved in dry soil

0 Answers   BARC,

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When do you use a VFD motor?

1 Answers  

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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,……..,?

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how can you size an automatic voltage regulator?

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Please give me a solid reason there are 2 ELCB's If we take Phase from ELCB NO:1 an Netural from ELCB N:2 why ELCB is tripping when we connect the Load?please brief me with detail

3 Answers  

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