Answer / k.prakashchandra

This test is for life evaluation / extension programme.The
dissipation factor (tan delta) represents the gross defects
and overall dielectric loss in the insulation.The first test
may be conducted after 10 years and subsequent tests may
conducted every 5 years , and if results are poor, after a
short period to watch the further deterioration

what are the standard IR values should be of R-E, Y-E, B-E, R-Y, Y-B, B-R of VCB in closed condition and in open condition for 500KVA & 1000KVA transformers. and what is the acceptable range when tested by 5000V megger.

0 Answers   ME,

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What is the difference between a verilog task and verilog function?

0 Answers  

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how single phase preventer works ?

0 Answers  

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working of bulb?

1 Answers  

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What will be the full load current of 60KVA UPS. Suggest for this formula.

8 Answers   ABC, Sodexo,

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What is the need of black rock stones under the transformer yard?

5 Answers   TNEB Tamil Nadu Electricity Board,

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what is called inrush current??

1 Answers   KSEB,

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110 KW MOTER DOL STATER 240SQ.MM CABLE MOTER AND STARTER DISTANCE IS 110 METER WHAT IS VOTAGE IN MOTER END AND SYSTEM VOTAGE IS 415 V HOW I CAN CALCULTE

2 Answers  

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for a 500 KVA connected load, I calculated 30% of capactor for power correction. Even after using 225 KVR capactor PF is not improving. What could be reason for low Phase correction factor?

0 Answers   Power World,

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- two pumps must work with them at the same time but if the first pump start the second pump  must delayed for some time to start  also , with motor rated power = 90 KW and rated voltage = 380 V and rated power factor = 0.85 lag please draw the power and control circuit for it and determine all circuit components parameters that you use it

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why most of the substations are rated in multiples of 11?

4 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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