Answer / gajanan

non linear loads means semi conductor devices. each semi
cond device has junction capacitance.when such devices are
swithed on or off the junction capa takes inrush current
which produces hormonics

how wud i know that whether i have to use unitized package substation or transformer?

1 Answers  

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Which type of power plant is more easier to produce electrical power at economical condition?

8 Answers   HAL,

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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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when ac current flows thru d coil of a contactr,it energizes,magnetic field attracts d contact of the coil...nw wont dt ac current in d contct induce current back on to d coil thru mutual inductance leading to high currnt in d coil

0 Answers  

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How select ELCB for 32amp. socket having quantity 12Nos. We have to do this wiring in PLANT. Please Also explain the incoming cable specification.

0 Answers   Gulf Industrial Services Company GISCO,

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How can we findout the maximum efficiancy of Transformer? At which load?

0 Answers   HAL, Tanfac,

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how much mininmum length required to conduct a DC Hipot Test on 33kV AC Cable with 45kV DC? Is it 20meter or Less then 20?

0 Answers   ABB,

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hai iam arunkumar. i have applied for an section enginner in rrb. i want lat 5 years solved question papers. if u have please sedn it to arun30682@gmail.com

0 Answers   RRB,

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we have a lot of model of rectifier but thyristor rectifier is the most rectifier that use in power system. Do you know why this rectifier is used?

0 Answers  

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What will hapen if we connect more capacitors than required for powerfactor control? Exactly what will be the effect on power system?

2 Answers   Mandovi Pellets,

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why we are using KVA rating for transformer,not KWh rating?

5 Answers   NTS,

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What is the diff btw Conventional & Addressable Fire Alarm System???

5 Answers   Emerson,

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