Answer / barkha thakur

dirrential relay is a type of directional relay
it operates when there is a difference in the primary &
secondary current

Answer / biju mathew

Differential relay is a relay which operates when there is
a difference between two currents. For example incoming and
outgoing currents in a circuit.

Answer / sanjayjssate

Diffrential relay is used in transformer winding protection, it calculates the current of secondary side with transformer turn ration, if the current on other side is very slightly diffrent it does not trip but when iy crosses a fixed percent of defined protection it trips the circuit.

why we grounding the neutral of a transformer?

3 Answers   GAS,

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what is active network?

2 Answers  

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what is load cell? whrere its used ? how to measured?

2 Answers   Essar,

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What will happen if the oil level in the buchholz realy of a transformer gets down?

3 Answers  

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WHAT IS THE MEANING OG (li = 7 In)

0 Answers  

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what is mean by VCB colour code..???

1 Answers   Student,

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Generally we denote power in 'p',voltage in 'v'but why can't we denote current in 'c' instead of I.

4 Answers   Bhel,

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Is necessary Protection CT, CLASS - 5P10 fitted at Incomer side of main Breaker ? Why ?

1 Answers  

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Why do we use center tap transformer that used with portable tools

0 Answers  

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what is transformer?

4 Answers   Mphasis,

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what is dyn 11

3 Answers  

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how to calculate the size of cable for 100 kva load,?can somebody tell me with a formula

7 Answers   Apollo,

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