RATING OF LIGHTENING ARRESTER FOR 11 KV LINE IS 9 KV BUT WE
KNOW THAT LIGHTENING ARRESTER IS USED FOR OVER VOLTAGE
PROTECTION SO WHY NOT THE RATING OF LIGHTENING ARRESTER BE
MORE THAN 11KV ???????????????//
Answer Posted / elangovan t
Lightning arrester is to protect the system from any high
voltages such as lightning.
If the system voltage is 11kv, then the phase voltage will
be 11/sqrt(3)=6.35kv. It means the RMS voltage of the phase.
The maximum voltage or the peak voltage across the arrester
and earth will be 6.35*sqrt(2)=8.98kv.i.e 9kv.
Therefore, for 11kv line it is rated for 9kv.
Is This Answer Correct ? | 135 Yes | 10 No |
Post New Answer View All Answers
How to back charge the Gas turbine generator
How to calculate LT XLPE CABLE for 11 kv / 433 v , 1000 kva oil type transformer system?
how is positive, negative, zero sequence is happen.. how is effect on 3 phase system
What is mean by hot and cold loop testing? What is the difference between them?
hi every body i am master student in control engineering and my project is slip control in trains i assumed a Dc motore as traction motor but i don't have characteristics of this kind of motor that is used in train. i want from every body if he or she has the characteristics or information about Dc motor that is used in train give me those information or technical characteristics .
Why efficiency of generator is higher than motor at a particular load?
Why the field rheostat is adjusted such that the voltmeter reads 380V
There are a trformer and an induction machine. Those two have the same supply. For which device the load current will be maximum? And why?
Explain in details how you would react to an unexpected incident when your supervisor or manager is not around to give instructions?
how choose conductor&depending upon load
Explain about 3 phase motor fault current calculation with examples?
What is precision of a measurement?
How to find ampere on ht side for selection of cable size ???
why do we lay up the core of a cable?
how much LT load can bear by the 100 KW HT connection.