Answer / vipul

Grabels are used for during leakage the oil may be dump to
dranage and it prevents from fire.
to prevent from vegitation (grass).
To avoid step / touch potential.

can volts/Hz be relied upon to use 460v,60Hz electric motors on a 380v,50Hz power supply?

1 Answers  

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How to find out kvar from any particular load capacity give a formula

3 Answers  

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We have isolation transformer 25kvA & ONLINE UPS 15KvA (3PHASE I/P,3PHASE O/P)where isolation should have connect,before UPS or after please brief.

1 Answers   DRJ ARDE,

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what are effects of harmonics in the three phase a.c power system ?

2 Answers   AIIMS,

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give me list of material for wiring of 20hp motor?

2 Answers   Alchemist,

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Explain the following and how these are working with PLC Unit 1 I/O Module Card 2 Adaptor Card 3 Ribbon Adaptor 4 I/O bus 5 I/O Devices

0 Answers   Mayur,

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In our plant we have installed new MCC with ELR and CBCT which is detecting some leakage current in the system but it leading to some confusion when to check that in which feeder which is drawing current we put off the whole panel itself but still CBCT detecting some leakage current so can anybody ans me , where i am going wrong or how to detect whether its actual leakage or CBCT malfunctioning.

0 Answers   Saint Gobain,

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Why use only DC supply to charge batteries why not AC Supply??

3 Answers   APC, Emerson,

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what is surge impedence loading

2 Answers   NHPC,

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How to check the LM324 Ic

0 Answers  

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How can we calculate cable size in Low voltage & high voltage

0 Answers   United Breweries UB,

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an amazing situation was faced when an alive distribution panel with 415 volts and carrying almost 200Amps has become short and this metal cubical showing 220 volts against neutral and earth. to redress any confusion i checked the panel with help of single 200watts test lamp which also glowing with max.intensity b/w neutral & metal body of DB. amazing situation is that i hold the DB firmly more than once with necked foot means without insulated shoes but not received any electrical shock. whereas our all running gen sets neutral points also proper grounded and this short DB was completely earthed , this is beyond my understanding . any body explain how is it possible . our running gen set neutral also grounded firmly

1 Answers  

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