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

In neutral the current will flow or not?

17 Answers  

---

Difference between Lugs and Thimbles

0 Answers   ABB,

---

Recently we had experienced following problem All RCCB breakers (connected to the load as well as spares) connected to various UPS systems at various floors at a high rise building tripped during a power break down and upon starting up of generator.This Generator is recently inducted into the installation. Can any one explain the reason behind this tripping. Regards Viswanathan

1 Answers  

---

why dc series motors never start without some load, and what will happen if starting with out load..

1 Answers  

---

How conventional fire alarm system works?

1 Answers  

---

---

How to control the dc motor in ac supply without thyristor circuit?

2 Answers  

---

What descriptive information does the NEC require to be marked on all conductors?

0 Answers  

---

how to calculate the conductor size for certain KV transmission line and distribution line?

0 Answers   Hyundai,

---

Explain Power factor in simple words

1 Answers   ETO,

---

what is SMDB

6 Answers  

---

how the arcing is made in ac electric arc furnace? ( between the three electrodes in any sequences or between the electrode & the charge(steel))

1 Answers  

---

Why 60Hz frequency is used in America what are all the benifits?

5 Answers  

---