how to calculate the megger values for motors and cables?
- 2 Answers
- 7315 Views
- Adhunik, I also Faced
- E-Mail Answers
Answer Posted / pradyumna171
megger value of any appleance should be 2 multiply with working voltage in kv plus 1 ie a 440 volt motor should have 1.88Mohm (2* .440 +1) , it is the minimum value. And megger voltage should be twice of working voltage of appleance.
| Is This Answer Correct ? | 2 Yes | 1 No |
Post New Answer View All Answers
Assuming that a dedicated neutral earthing transformer is provided for each GT generator, when the two generators are running in parallel, has consideration been given that the earth fault current from one generator stator winding be split between the two neutral earthing transformers? If so, what adverse impact will this have on the operation of the 59N and 27TN devices?
What is installed in PAC that is control the humidity
IN MY SYSTEM THERE IS ONLY OVER CURRENT EARTH FAULT RELAY IS AVAILABLE. FOR THE UNBALANCE SENSING IS THERE ANY RELAY IS AVAILABLE? THE SAME CTs WHICH ARE USED FOR THE OVER CURRENT EARTH FAULT RELAY CAN USE FOR UNBALANCE ALSO?
What is the difference between electronic regulator and ordinary electrical rheostat regulator for fans?
What is the minimum IR value of HT/ LT cable? Pls post separetely!!!!!
Why 9KV surge arrester having 7.65KV of MCOV?
1. What is differential relay? How it operates? 2.How to calculate the Short Circuit Impedance in Transformer? 3.What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works? 4. While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply? 5. What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer? 6. Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example? 7. Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient? 8. What should be the minimum and maximum ohmic value for earthing? 9. Why DC Currents are not used in transformer? 10. What is the Frequency while we step up the voltage from 220V to 11KV? Is it possible? Explain it?
how generator avr give to the input?
I have 1500/1A CT If i connect this CT in 6.6KV bus bar means what will be the voltage present in CT?
a battery is having capacity 100AH and 25% charging .if a load taking 10A & connected 6 hour .what is the final condition of the battery.
Write masons gain formula.
how line turns ratio changes in 3 phase with change in connection
H.t motor 6600 volt to same motor lt supply 440volt supply applyed to h.t motor to effect....
For a spring controlled governer the relation F = ar+b (F is the controlling force, r is the radius of rotation a and b are constants), indicates that the governer is
what is the interrelation between voltage current torgue speed and magnetic flux in case of different types of electric motors
