Answer / engr. kashif

Insulation+ increased surface area to dissipate effect of lightning.

What is the rating of HT SUBSTATION and LT SUBSTATION?

11 Answers   NTPC, Sail,

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in case of OC+EF relay, how the burden is divided/calculated/shared by the CTs in case of normal (healthy condition) and during fault conditions.? three coils of OC & ef coil is conected in residual connection across the three CTS.

1 Answers  

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they transformer oil leakeage to beather tank and top parts . they protection relayes was not operated.what is the oil leakeage problem.

1 Answers  

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Two bulbs of 500w and 200w rated at 250 v will have resistance ratio as ?

2 Answers   CGL, Dreamz Infra, Sunny Developers,

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What is the meaning of Dyn11 of Transformer.

17 Answers  

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IN star -delta motors normally first operated in star mode {absulated given (r-y-b) phases after one miute change in delta mode in this case i am change phase sequience for example R -PHASE TO CHANGE Y-PHASE ;Y-PHASE TO CHANGE R-PHASE SO THIS TIME MOTOR WILL HAPPEN RUNNIG MODE EIGHTER(OR) STOP MODE(TRIP MODE)

6 Answers   MacLellan,

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How to calculate no of EARTH PIT? Describe the formula as per IS standard?

0 Answers  

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In both 600/1000 V cable and 450/750 V cable, we can supply 415 V. However for distribution, all utilities are using only 600/100 V instead of 450/750 V. What is the reason?

0 Answers  

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How calculate the Transformer Impedence With Example

3 Answers  

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why not starting switch first connect in direct on line starter?????

0 Answers  

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how to find 5 kilo meter long under ground 33 kv cable fault location if IR VALUE shows 0.05 M ohm @5000 volt.and cable fault locator shows some time fault distance 3 kilo meter ,3.7 kilo meter and some time 1 kilo meter? now how to find the fault location that where is leakage.

1 Answers   FGI, OPS,

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why current is denoted by I

7 Answers   CTS, GCT, Samtel,

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