When measuring the Insulation resistance of a motor winding
(winding to earth) using a megger meter, Applied
voltage(1000V) was automatically reduced to 500V. and the
measured insulation resistance values are also very low (in
Kohm range) Can anyone give me a reason???
- 3 Answers
- 6120 Views
- I also Faced
- E-Mail Answers
Answer Posted / sridhar
there are two reasons of getting the value low.
1. due to moisture in the motor
2. winding has become weak
to overcome these problems the methods can be adopted
1. heater or halogen lamp to be provided near to the
winding of the motor to bring the resistance value as per
std.
2. by this above method, the insulation resistance is not
upto the mark, the same winding can be overhauled to
achieve the required insulation resistance value.
| Is This Answer Correct ? | 3 Yes | 0 No |
Post New Answer View All Answers
Do any one know exacatly when the results for NHPC held on 8th march 09 for engineering trainees will be released ?. if so please post it, i'm eager to know it.
how to calculate the capacitor to maintain power factor?
what is mean by descripiency relay? & wht is its ansi code?
Can i use the B-curve MCB instead of C-curve MCB
why swityard is necessrry requirement in any bis power distributin systems?
Why collecting electrode of ESP to be earthed
what about SAP/MRP regarding manufacturing of electric motors and all drives?
Work done in a free expansion process is
How seriving & testing of the HT & LT breakers are done. What are the standard Ir values on which we can come to know the test is passed or failed?
What will be the fault current of any system when its generation is 10% of BASE generation( FUll Load )?Will is 10% or the same as full base calculation?
how can get electrical c licence.now i am working in spining mill , transformer capacity 2750KVA. SANCTION DEMAND 2250KVA. PLEASE ADVISE ME . MY CONTACT NO 09944226823
what are safety measures in /control in diesal engine/ explain them?
why 15 kw motor winding resistance is low then 5 kw motor winding resistance?
please give me all the Alarm .Trip ,Safety Relays & Conditions of UPS Systems mail me on ashokbabunhce@gmail.com
Dears we deal in Chemical are Plate earthing. Kindly call if any requirement and questions. Tech Earth Solutions Mohit Verma 8791071007
