why we use REF and Differential Protection in one transformers?my doubt is both protections are operated in internal fault only.why we want to use 2 protections?please clarify.

7 Answers  

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why square root 2 is multiplied with line voltage in selection of LA ie 11/sqrtroot3=6.35 kv and it is multiplied with sqrt2 ie 6.35 KV*sqrt2=8.9 kv we will select 9kv.my question is why we are multiplying with sqrt 2?

1 Answers   KSPL,

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what is the powerfactor

5 Answers   GVK,

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How do i right a ladder diagram that has 1 actuator that performs a full stroke followed by a half stroke

0 Answers   Tata Motors,

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Differenciate between circuit wiring and sub main wiring with illustrations

0 Answers   MU,

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what is the difference between transformer,converter and transducer

0 Answers  

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defination of loads

1 Answers  

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How we calculate the spacing between the conductors in 11,33KV lines?

3 Answers   NHPC,

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can anyone plz tell me in 3 phase induction motor, whare we use STAR CONNECTED MOTOR and whare we use DELTA CONNECTED MOTOR

3 Answers  

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what is the different between counterpoise earthing and pipe earthing?

1 Answers  

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please tell me the all the spcications of the 100MW 11KV HYDEL POWER PLANT SPECICATIONS

2 Answers   Bhel,

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what happens when series resonance occurs?

0 Answers  

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