Answer / ravi

Differential Protection is intended to protect the
transformer windings. For this purpose we need to arrange
the CTs on both primary and secondary side of the
transformer and connect both the secondaries in such a way
that whenever the fault level increases above the threshold
value then the the associted relay will trip the power
circuit.

what is the std. earthing resistance for 440V system or m/c, 33000/440 Volt substation? What is the std.?

2 Answers  

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what is the equation of insulating resistance of motor???

1 Answers   Birla,

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wat is the criteria we use the diff. relay ?

2 Answers  

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IN WHICH MODE THE TRANSFORMER WILL GET A MAXIMUM OUT PUT VOLTAGE. ASKED FOR POWER GRID EXAMINATION STAT-STAR,STAR-DELTA,DELTA-STAR,DELTA-DELTA

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How to select busbar?

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0 Answers  

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where is used dc volage transformer,and what is highest capacity of transformer

2 Answers  

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how do u get less voltage in star connection

4 Answers   BARC,

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How many types of Differential protection are there? and what the special arrangement are made at the time of charging of a transformer on the Differential protection?

1 Answers  

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I'm looking for a manual set for a Credence ASL-1000 or ASL 3000. Softcopy would be preferred but I'll take what I can get.

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What are all the points to be checked while decanting diesel from tanker lorry to HSD YARD

1 Answers   Cisco,

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What do you mean by class of CTs and what is the meaning of cl 1.0, cl5P10, cl 10P10 CTs?

3 Answers  

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