Answer / vinoth

IR means Insulation Resistance. basically IR value need is ( Rated KV+1 ) Mohm.
For eg if motor rated voltage is 11Kv then we need IR value has 12Mohm.

Minimum 1Mohm is sufficient to start LT motors.

For HT Motor- ( Rated KV +1)Mohm

it is very suffient to start motors

why and where we use early make & late break contacts in protection?

0 Answers  

---

is there or does RCCB work for single phase connection?

2 Answers  

---

If DC supply is given to a transformer it may a) Work b)Not Work c)Give lower voltage than the rated voltage on secondary side. d)burn the winding

12 Answers   wbsedcl,

---

why the generating / transmitting voltage is in the order of multiples of 11(ie 11kv,22kv,33kv......)

1 Answers  

---

In between UPS out going changer over switch and ups raising main input, both side cable gland producing heat but the cable doesn't get heat,Why?

0 Answers  

---

Igfet is a

0 Answers  

---

why is  use the star and delta connection and difference

1 Answers  

---

what is bus pt and what is the function of it ???

8 Answers   TATA,

---

I am getting diesel genset 62 kv for my house In addition there are 6 meters of 11kv for the house Lift also being installed for house plot sise 200sq yds total 4 + 2 foloors I want to know how much earthing required how deep it should be

2 Answers  

---

How to Select transformer for 100HP motor plz... With calculation

2 Answers   Rasandik,

---

Whay you want to change your job.

1 Answers  

---

how a flip flop can be used as a latch?

0 Answers  

---