Difference between control junction box (cjb) and power junction box(pjb)?

0 Answers  

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in our 6.6kv motor feeder[it is having two sources from Bus A&B] earth fault relay is acting, we checked CBCT connection and cable meggerd values found very good still earth fault acting during first two are three start after that it will hold. please clarify what was the reason. if same motor is starting from other Bus-A it will start.

1 Answers   Gasal, Voltech,

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sir i want previous entrance exam papers for written test

0 Answers   Vizag Steel,

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Whta is earthing?What is the optimum value of Earth Pit?

2 Answers   Bharti,

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How to increase the kvah ?

1 Answers   IGP,

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I have carried out wiring for lighting in a shed in Industrial area which contains Metal halide lamps & have balanced in 3ph.Now when we put all the lines on in the daytime the current taken at 3phases at MCB comes to be equal i.e.28,29,28Amps respectively but in the night time i.e between 7p.m.to 11p.m. at the same MCb the current is 52,59,62Amp, though I have fit 63A MCB it is tripping in the above period.What may be the reason.? Note: This industry is located in industrial area where majority of steel ingot manufacturing plants are there. Whether this may be due to harmonic? what should I do to overcome above problem.pl suggest urgently.

4 Answers  

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in india why the generating voltage is like 11kv,22kv etc

1 Answers   Alstom, Ford,

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how to set earth fault relay

1 Answers  

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how to handle 2500 kva transformar

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why the inserting resistance in wound rotor induction motor decrease the starting current and increase the starting torque

2 Answers  

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In a Impedance Based Distance Relay (Quad Characteristics) - Could there be two different Line Angle(RCA) for Ph-Ph & Ph-Gnd? If So Kindly Let me Know.. Where, What are the advantages of the same?

0 Answers  

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3phase 4 wire system is more reliable or 3 phase 3 wire systems?

4 Answers  

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