why overcurrent fault occurs in power system.

1 Answers  

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what is class of SPD and dittels of all class ?

0 Answers  

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what is closing resistor in circuit breaker? why it used?

3 Answers  

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what is MCCB?

8 Answers   NTPC,

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If a Power Transformer Fails and the transformer manufacturer suggest that "Do all electrical test on the transformer?". What are the test to be conducted in this condition?

5 Answers  

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volts=230 c=10mf a=??

0 Answers  

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what is meaning of AMF, WHY IS USING IN GENSET

1 Answers  

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Can any one help me how to set an overload set the range from 2.8A to 4A , rated motor current 22A, CT 60/5A

2 Answers  

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what is the main difference between power devices and signal devices

0 Answers   Wipro,

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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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WHAT IS EXTENDED DELTA AUTOTRANSFORMER? WHERE WE USE THAT?

2 Answers   Amtek, TATA,

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What are the application of filter?

0 Answers  

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