A wattmeter is marked 15 A/30A, 300V/600V and its scale is marked up to 4500 watt. When the meter is connected for 30A, 1600V, the pointer indicates 2000 watts. The actual power in the circuit in

1 Answers   Jindal,

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What is the possible cause for failure of lightning arrestors in outdoor substation under normal condition

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After synchronization with grid what is the demand value QKVAR and how we will maintain that?

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what will be the effect on the voltage .if power frequency is increasing or decreasing.

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if in 3-phase system voltage=440V,frequency=60Hz, current=400A. then if it is single phase then current=? and if it is single phasing then current=?

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We have 11kV/110V three phase indoor potential transformer in 66/11kV Sub-station, where the failure of PT is frequently happening and the rating of the PT is 0.2 class accuracy, with primary star and seconday (two cores) star connected. Some experts has suggested to not to connect the PT Primary neutral to the ground because when transformer neutal NCT connection is loose; the faulty current will flow through the PT primary neutral, resulting into failure of PT. My question is: Is it necessary to remove the primary neutral connection of the PT from ground? if not, what would be the reason for failure of PT. Please guide me.

2 Answers   KPTCL,

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what is the condition for YnD11

0 Answers   Bhel,

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what is meant by k-rating in isolation transformer?what is k9, k14 stands for?

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what is different between buchhoz relay and pressure relife devices in transformer

2 Answers   Spanco,

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can I improve the furnace power factor (10 mva transformer) by adding a capacitor bank before the transformer.Does system power factor vary a lot with the furnace PF?

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hi engineers,if suppose distribution is going to two diff village mistakenly they r interchange the neutral of twowhat happen?

7 Answers   Bhel, L&T,

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In a incandescent bulb, if the glass is punctured, and then power is supplied, the tungsten filament blows up with a flash.Why?

2 Answers  

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