An 11kv system consisting of an underground cable to a sub station about 300 meters away was shut down for about 10 hrs. On energising, it tripped off on earth fault about 10---20 mins later 6 times but since than it is not tripping.its already 3 weeks now. The SPAJ was found to be fine. what could be the cause.No test had been done to determine the cause of the trippings till now because of demand.

2 Answers  

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what is lxr?

0 Answers   NTPC,

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what is the use of surge suppresser in 33 KV incoming panel. where it must be installed,inseries with incoming cable surge suppresser must be at incoming of the breaker are outgoing of the breaker

1 Answers   Siemens,

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how the phase convertor changes the no. of phases

0 Answers  

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Is there any guideline say about display of earthing value near to earth pit

0 Answers  

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What are the safety devices on Cumins Diesel Generators from 500 kva to 1500 kva.

1 Answers   Maruti Suzuki,

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Draw an S.L.D of the main panel for a hospital, showing meter position. Essential loads are: 1) Equipment load 100 KW 2) Critical load 500 KW 3) Life AID Safety load 400 KW 4) NON-Essential load 200 KW 5) Other service loads 200 KW Calculate and suggest the size of the transformer, size of main cable, capacitor bank, and calculate the capacity of an emergency load having above first three mentioned loads is supplied by an emergency generator.

0 Answers   FEWA, HMK,

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what is the different between DC & AC load Line.

1 Answers   Emarat,

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what purpose of the percentage impendance in transformer

3 Answers  

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please send privious years question papers of jindal steel and power ltd.My e mail id is rajanikant.sngh@gmail.com

0 Answers   Jindal,

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what is the difference between single phase, 2 phase, and 3 phase in electric meter?

1 Answers  

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how is the connection of a 3 phase ct trivector meter done on a pole mounted transformer

0 Answers  

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