What should be the DC voltage for Hi-pot test on 11kv switchgear

3 Answers  

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why field winding in synchronous machine connecting in star position?

1 Answers   HCL,

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what difference between thermal and bi-metal over load relay?

2 Answers  

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two generator runnig with parallel but only one NGR on And one off Why

1 Answers  

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what is diffential relay? testing proceure?and transformer reach Over load thet time differencilal relay operate or not ?

5 Answers  

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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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What is Peterson coil? Where it is used?

2 Answers  

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State Maximum Power Transfer theorem.

0 Answers   ABB,

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please send me previous year questions of jspl through which i could prepare myself for the test.

0 Answers  

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how to do CT Burden test

2 Answers  

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Before i went to bed my master bathroom lights were working fine. At 2 am, when I went to use the lights, none of them were working. The outlets throughout the bathroom work, but the lights and fan above the toilet don't. I have two panels of switches. The one panel has four switches. One of the switches turns on the hall light, and that works. The other three are to other lights, and they don't. The other panel has three switches. One of those is to the fan, and the other is to a light above the toilet. The other is a to light that is also on that other panel. I tried the breakers, and the one that turns off the outlets, marked for the bathrooom, turns on and off the outlets. None seemed to be tripped. I checked the lightbulbs, and they are fine. Please help

2 Answers  

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UG cable sizes were specified in sqmm. But practically its not coming to mesure. What's the reason for that? And how they specify the size of the cable?

0 Answers  

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