Question { 3551 }

what perpose of use CT ratio in gt,st,uat

Answer

primary current
/
secondaru current
or 1 or 5 amper
ct berden /fits whit relay or ampermeter
I'm from Iran
My English is not very good
Excuse me for this problem
Good luck

Question { 6965 }

What is the difference between class0.1 and class 0.1s
accuracy of current transformers

Answer

If the CT is connected to a load of 0.1
If the CT is connected to a source close to the 1 used.
I'm from Iran
My English is not very good
Excuse me for this problem
Good luck

Question { 3358 }

How to increase solar cell efficiency ?

Answer

I think
If a lens in the path of sunlight to solar cells, we
Can provide more heat to the cell. Of course this is a
personal theory.
good luck

Question { HAL, 3756 }

What is meant by directional power and reverse power relay ?

Answer

protection from motor becoming a generator.(reverse power)
Secondary zone of protection for internal faults.(directional)
good luck

Question { TCS, 4812 }

generally rectifying of
ac tells. ac signel
appear at phase and
neutral with respect to
frequency by -veand
+cycles. but we doesn't
experience shock with
neutral in house hold
ac??????.

Answer

Because the neutral is connected to ground.

Question { 3718 }

Define over current & earth fault ?how its functioning ?

Answer

Means of protection from overcurrents
setting current & setting time
idmt
Means of protection from phase-to-ground connection
setting current
&
And in the least possible time trip

Question { ITC Infotech, 7609 }

How we can measure the thickness of bus bar for a given load
? any farmula Plz elaborate clearly.

Answer

First, we calculate the load current
Second, consider the highest temperature and selection
coefficients associated to it. For example: 50C
Third, the rate of sea level and the corresponding
coefficients, for example. For: 2000 meters

Fourth, the relative humidity is considered, and find the
coefficients. For example: 25G / M3

Coefficients are included in the tables.

I do not know how to put an image

If i learn how to put images on your site
Be sure to leave

I'm from Iran and my English is not good
Excuse me the my English is not good.
good luck.

Question { Jindal, 6235 }

why we don't use air circuit breaker on H T line in place of
vacuum circuit breaker ?

Answer

vaciuum c.b is advanced.

At the moment arc, and the keying is more effective.
air c.b is more expensive.