what is the difference betn earthed and unearthed cables which is commanly used why?

2 Answers   Bhel, Power Grid,

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if acapacitor connected to power supply will it cosume power& will it going to get recorded in energy meter

2 Answers  

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WE are using a 63A MCCB(SIEMENS MAKE) for one of the feeder in LV substation panel.It is supplying to a lighting & power socket DB.Settings in the MCCB is Ir = 63 * 1 , Isd = 8 times of Ir , tsd = 0.5 sec( I2 t off). Sometimes this MCCB is tripping .But no trip in DB MCB. Can anybody tell me reason ? From where i can know about the MCCB settings?

5 Answers  

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dear friends, we are use 130 hp load run with 0.98 power factor ( 38KVAR capacitor connected ). if we need improve the the power factor to 1 (unity). how much kvar capacitor to be add. have any formula? please share with me.

3 Answers   Reliance,

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Explain REF protection and sbef protection in transformer?

3 Answers  

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what is brushless alternator?

0 Answers  

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Give two basic speed control scheme of dc shunt motor?

0 Answers  

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can v use earth as nutral. yes than y.if not y.

3 Answers  

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what are the various types of towers used in transmission line

12 Answers   Power Grid, UltraTech,

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Why the standard of ambient teperature mentioned as 40 degree celcius in machines.

0 Answers  

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what is diffence between synchronus and asynchronus AC motor.?

1 Answers  

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In DC while we mention the voltage we are using -48V but in case of AC we mention only 230V not -230V, why we using -48V not 48V

2 Answers  

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