In CDG type IDMTL realy O/L , E/F, O/C which are used for out going feedrs,on R-phase o/c element, Y-phase , e/f elecment and on b -phase o/c element will be connected . Why the earth fault on center phase only, why not on other two phases?

2 Answers  

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If the rotor pf of a 3 phase induction motor is .866, then what is the phase displacement between stator and rotor magnetic field 1)30,2)120,3)150,4)90 please justify....

2 Answers   GATE,

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Good morning: I'm looking for some informations about the OLTC or the LTC: I wont to know what the function of the tie-resistor in during the operation of reversing/coarse operation Cordially

0 Answers   CMERI,

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generally rectifying of ac tells. ac signel appear at phase and neutral with respect to frequency by -veand +cycles. but we doesn't experience shock with neutral in house hold ac??????.

1 Answers   ETA, RRR, TCS,

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what type of motor used to move a 1 ton gate? and relate ratings with load.

0 Answers   Khidmah,

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what is tesla ?

1 Answers  

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how did the testing of protection relays done through current injection

0 Answers   Bhel,

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what is rotatng magnetic field in case of three or multiple phase alternating current machines???

1 Answers   NHPC,

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Current Transformer's star point must face the protected object for the relay operation?

2 Answers   Siemens,

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depending on what we can choose the rate of mccb considering that we know the total load

2 Answers  

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1. What is differential relay? How it operates?

3 Answers  

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which protection function should measure RMS value of current&DFT value of current?

0 Answers  

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