Answer / nagaseshareddy.m

significance of per unit impedance is reducing the
complexity of calculation. Zp.u=actual
impedance/baseimpedance

Answer / praveen

In power system values of impedence will be large so to
reduce its complexcity in calculation it is expressed in
per unit....

Answer / mafika

p.u impedance represents the amount of volt drop that's
going to occur in the transformer and also helps in the
fault calculations

Answer / tiwari

P.u calculation is done to
simplify the calculation per
unit impedence is
convenient in case of
transformer because both
primary and secondary p.u
impedence is same

Answer / ravindra

it's dimentinalless quantity not having any units, it can
be converted refer to primary or secondary.

Answer / parviz

By per unit impedance, we are able to deal with R, L and C in the same way as a resistor.

Answer / jabber

ohm/m

What is the work of ACCP in LT panel?

5 Answers   Juniper Networks,

figure of phasor diagram of transformer when full load or no load ?

1 Answers   Swastik, TCS,

What happen if the 24 volt DC supply is disconnected from air circuit breake ?

2 Answers  

explain about the electrification in the Indian Railways? ie., how the power is taken and used to drive the train? explain with the block diagram??

1 Answers  

We have one Energy meter for Measuring the voltage,current,power,energy(KWH,KVARH,KVAH) & power factor.The problem is that the meter does not show whether the PF is lagging or leading.So i want to know that is there any way or calculation to find out that whether the PF sign (lagging or leading) depending upon the above mentioned parameters?

4 Answers  

we have total 1000hp motors we paid 7 laks rupees how to reduce power bill

4 Answers  

The initial current is very large at the time of starting for almost all DC motors. SO WE USE STARTER FOR A SAFE STARTING but at our homes we don’t see any starters in our coolers, motors.WHY DON’T WE NEED STARTERS FOR THESE APPLIANCES?

1 Answers  

What is thermal relay and how it is works in transformer please explain

2 Answers   Future Group,

where they are using surge arrester and lighting arrester? how they connect? what is the purpose of that?

1 Answers  

Why are iron cores in transformers made laminated?

0 Answers  

why lightning arrestor are made by 2 stack of insulator but why cvt are fully 1 stack of insulator.

1 Answers  

If a motor of 30KW rating &200 mtrs distance from feeder give me the cable size selection calculation?

0 Answers