Answer / k.prakashchandra

Percentage impedance is only a percentage as it is
percentage of I x Z / V and the unit of I x Z is V. V/V is 1

Answer / euclid

Transformer impedance is a ratio
of the transformer’s normal full load current
to the current available under short circuit condition.It was stamped on every transformer nameplate. Why did they stamped it because it is a tested value after the transformer has been manufactured.

Answer / afsal

Percentage impedance is the ratio of voltage drop on full load due to winding resistance and leakage reactance to the rated voltage of the transformer.
Z%= Vd/Vr *100

this can varied at the design stage by varying voltage per turns and geometrical size of the windings.

break down of electricity is more in summer or in winter ? give reason

4 Answers  

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define electrical field?

6 Answers   L&T,

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I want to put this query to SENIOR & EXPERIENCED ELECTRICAL ENGINEERS. 1)I want to know about the control circuit diagrams for control panels. I found it difficult to understand. Is there ant booklet through which we can learn the circuit diagrams? 2)I want to learn about conduiting, laying cables, preparing cable schedules and various techniques which is the part of building infrastucture(construction field). I don't have any experience in this area. I have experience in control panels only. that's why i am not getting any opening in building infrastucture (construction field).Can I get the job in this field as Trainee Engineer? How to enter this field? I need job in PUNE

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what is working of Master trip relay ?

9 Answers  

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if transmission voltage expressed as the multipple of form factor(1.11)........11,33,66,220 etc......then why madakkathara substation(kerala) voltage is 400kv..not 440.....?

2 Answers   KSEB,

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how can we chack a capacitor in acircuit

2 Answers  

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1.difference between sts & ats? 2.what is fm200 system brefly explain?

1 Answers   Ericsson,

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how to check ac servo motor

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how to select the cable size? any formula to calculate cable size?

4 Answers  

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Transformer type...??

1 Answers  

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how to calculate power

3 Answers  

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What is the effect on power factor, shown by a trivector meter; incase of reverse phase sequence. If the power factor of a system is lag what meter will show in case of reverse phase sequence connected to the meter. and What in case of lead.

0 Answers   TATA,

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