Answer / amit pandey

it is the ratio of actual quantity to base quantity.

Answer / xxx

per unit impedance of a transformer is the fraction of the
voltage applied when the current is equal to the rated
current when the terminals are shorted.For example, if a
transformer has 0.05 pu impedance (on percentage terms, you
say that transformer impedance is 5%), full rated current
will flow in the primary and secondary if you apply 5% of
the rated voltage to the primary after short circuiting the
secondary terminals.In other words, if full voltage is
applied to the primary of the transformer and the secondary
terminals are shorted, the current will be 1/(p.u
impedance) p.u. ie; in the above example of the transformer
with 5% impedance, the current will be 20 p.u. (ie; 20
times the rated current).
This definition can be extended to other electrical
appliances also.

Answer / jignesh

10 db

if we convert watt into kva,which one formula use by us,pls tell me?

16 Answers   ABB,

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1.what is electricity 2.what is electronice 3.how many modules 4.five electrical component with symbol 5.five electronice componene with symbol 6.how convert 220v.A/C to 24v/DC 7.220V.WAIRING DIAGRAM OF AMMETER/VOLTMETER/OHMMETEER

1 Answers   Hatsun,

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Why celling fan rotates in anticlockwise direction and table fan in clockwise direction ? Give technical reason.

5 Answers  

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iam using DM 3251 voltmeter(1 percent accuracy)for 11KV system PT ratio is 11KV/110V.can anybody explain what is the max and min voltage deviation.

0 Answers  

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Why r use in the tap changing x' mer.

2 Answers   L&T,

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i have seen a picture of a power plant. in that pic. i saw chimney like giant structure which were spreading smoke like something...i want to know is it chimney or cooling towers, as my friends use to say.

2 Answers  

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For overhead protection we use which transformer?

0 Answers  

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What is the rating of your capacitor bank at your company.

36 Answers   Ajnara Group, Amara Raja, Amol Electricals, Apollo, ATC, Bhagiradha Chemicals & Industries, Bharat, CBRE, Cisco, Government, JLL, MEIL, Reliance, Sterling, TNEB Tamil Nadu Electricity Board, Torrent Pharma, Victory,

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Why CT secondary is grounded?

11 Answers   GE,

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According to underground cables a) stress b/w sheath & conductor is high b) inrush of core & conductor

0 Answers   CDS, Engineers India Limited, TNQ,

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77 In constant power region of 3-phase IM torque-speed characteristics, the torque is proportional to A speed B slip C 1/speed D 1/slip

1 Answers  

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types of transformer ?

3 Answers   CG, JLL,

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