Why Lightning arrester used? Can we use piece of iron as a
core material of transformer, if No, why? In CRGOSS
material what is meaning of cold rolled grain oriented? Why
Impegrenation of Transformer is done? Properties of
Insulator? what is phase angle? Testing of transformers
(Routine & Monthly)?
Answer Posted / dhiraj
In power system when lightning occures it brings ehv to the
earth which can damge your Power system badly to avoid that
we must use arresters with solidly ground to divert the
lightning path,
If we use Iron as core material the core losses will be
like hell which will make trafos efficiency to very less
and due to that eddy current increase will make heating of
trafo.
for further details read power system engg book.
| Is This Answer Correct ? | 3 Yes | 1 No |
Post New Answer View All Answers
How dia computation perfomed in cold rolling mills .
how to interlock 3 incomer-ACB,1 buscoupler ACB,... pls answer this question and if possible send me the ckt diagram..haifriends2910@gmail.com
What is the difference between Delta & Wye windings?
True or false question. 1.The fuse provide phase and neutral 2.power loss in electrical circuit can take place in (resistance or inductance or capacitance). 3.two phase system each phase has separated by a phase difference of (90 or 180 or 270 or 45). 4.3 phase balanced star connected load neutral current shall be (line current or phase current or zero or unity)
we have a 2.5hp Starite electric motor water pump,the elec motor burned out,we need to replace starting capacitor(old capacitor specs erased),what microfarad rating capacitor do we need? 110-125V
Why does the Solid state Rectifiers for 3-ph brake motors sometimes have 2 & sometimes 3 output terminals?
we are having 110 Kv,250mA Electrostatic precipitators for coal fired boilers. what will be static voltage and current after discharge and what time it will remain before earthing?
my b-tech percentage is 50%. what answer will satisfy the hr ?
how r charge carriers produced
what will happen if frequency is below 50 hz?
what is sevice settings for mccb?How can be it setted?
How to run a three phase motor into single phase........
How earthing of switchgear system to be done.
How we can determine short circuiting current any plant and for example a plant which power generation is 415 volts and plant load is 500 kw.
What is the role of power pack in substation protection system?