difference between over current and over load protection?

5 Answers   BARC,

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WHAT IS REMOTE CONTROLLED DG? WHAT IS DIFFERENCE BETWEEN REMOTE CONTROLLED DG & NORMAL DG SETS

2 Answers  

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If a fan get trip and run in reverse direction due to system flow. Now in this condition during starting how can a VFD bring this negative speed to zero and later run in forward direction?

2 Answers   Aditya Birla, Siemens,

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Which motor has more efficiency ;Synchoronous or Induction motor ?

4 Answers   TATA,

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When measuring the Insulation resistance of a motor winding (winding to earth) using a megger meter, Applied voltage(1000V) was automatically reduced to 500V. and the measured insulation resistance values are also very low (in Kohm range) Can anyone give me a reason???

3 Answers  

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For Synchronisation of DG Sets Sometimes we people use NIC (Neutral Isolation Contactor) Instead of 4-pole ACB or any switchgerar..Please guide me why is it so????

4 Answers   Piramal Glass Limited,

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differance b|w ground, neutral&earth

11 Answers   Bhel, SKH Metals,

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Sir We have a REF relay connected to 10MVA(Y-Y) Transformer.on External earth fault REF relay trips along with earth fault relay.The REF relay has no complant as we tested relay.Why is it happening?

3 Answers   KSEB,

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in one substation we have two power transformers of 100mva,75mva capacity.statoin load is155mva.how much each tranformers share the load????

6 Answers   TNEB Tamil Nadu Electricity Board,

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Unbalance in voltages at motor terminals is caused by ____.

0 Answers  

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How to earth the star delta connected transformers?

1 Answers   UPPCL,

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what is on line transformer and off line transformer.

3 Answers   Cisco, HP, ICC,

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