Answer / vinay gupta

between earth to phase it must be from 50megaohm to
infinite. and from phase to phase it must be from
500megaohm to infinite.

Answer / praful

Thumb rule to measure the IR value is add 1.5 to the
operating voltage (convert the voltage in KVolts) the
answer is the min. required safe IR value (Mega ohm).
For Example the Operating voltage is 22kV then 1.5 + 22 =
23.5. 23.5 Mega Ohm is the min. IR value required.
The IR value must alaways be on higher side.

Answer / shivkumar sharma

Between Earth to phase insulation resistance must be twice
of operating voltage by H.T.( 2.5 k.v./5 k.v. )megger

Answer / mintu kumar pandit

insulation resistance 11kv to 33kv minimum IR value for new
cable ph to ph & ph to earth 400 megohms for 100 meter 1 minitue
cable after repair the resistance must not be less that
10 megohms ( megger size 1kv )

how the diesel generator maintain the rpm when the generator loaded varies from 10% to 70% immediately?

3 Answers  

---

cause of failure of transformer bushes

3 Answers  

---

how we can calculate earth fault current?

1 Answers   Alchemist,

---

sir iam a 3rd yr eee student.no core company comes for recruitment to our college.my aim is to be placed in l and t.tell me the procedures.

0 Answers  

---

xplain in detail d pr. of synchronous motors? why syn. generators r used for the production of electricity?

4 Answers  

---

Under wat condition statcom operates as an inductor for the transmission line?

0 Answers  

---

what is reasion of harmonic create the power supply , And how to reduced to harmonic

1 Answers   Turbo,

---

why multiplying factor is used in wattmeter???

1 Answers   Nippon,

---

HOW THE AC GENARATOR CAN GENARATE REACTIVE POWER,HOW CAN WE CONTROL IT.AND OTHER SOURSES OF REACTIVE POWER GENARATIONS ARE WHAT.

3 Answers  

---

can any one help me out by posting something related to rvnl interview for site engineer electrical.? what is the procedure? what kinda question they ask us? how long the interview goes? and any tips? and any thing you want to share?

0 Answers  

---

why the electrical insulators suspention breakdowen

2 Answers  

---

How do you select a cable size(cu and Al) for a particular load

6 Answers   Pepsi,

---