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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 7479typical per KM resistance values of ACSR DOG conductor for 33KV & 11KV OH system? typical per KM resistance values of XLPE 300Sq mm cable for 33KV system? typical per KM resistance values of XLPE 185Sq mm cable for 11KV system?
2 22361for 11KV OH system what will be typical per KM "R" "L" "C" parameter. for 33KV OH system what will be typical per KM "R" "L" "C" parameter. for 33KV UG system what will be typical per KM "R" "L" "C" parameter.
2456how to caculate no load loss, load losses & impedance percentage in power or distribution transformers
4 6655anyone please send transformer parameter design formulas & details of tap changer ? plz i have interview this week its more helpful for me ?
1864I have a relay contact rated at 220v dc which is supplied with a 24vdc from the panel,for it to trip the dampers(24vdc).What if the application of the relay changes so that it should work at its rated 220vdc then will it work at 24vdc supply given or any other consideration needs to be taken .....
2080A resistance, inductance & capacitance are connected in series between points A & B.The voltage drops across the resistance,inductance&capacitance are found to be 40V,70V&100V respectively. What is the total voltage between between points A&B (Vab)? a)210V b)70V c)50V d)230V
6 83551- What is the Polarization Index number be good for 15KV 3c#500MCM electrical cable? 2- Can I use the IEEE Std 43-2000 to perfom the PI test? Thanks
3373Post New Electrical Engineering Questions
what topics we have to concentrate for power grid et.written test.and tell what to read for english synonyms and antonyms.
a starter used for squirrel cage induction motor?
which phase is preferred for connecting 1 phase vt used for synchronizing OHL? WHY?
How to calculate energy stored in an inductance?
how commomn gate triggering is given for TRIAC ? other thyristor wont be efffected?
percetans
it is possible to rotate the DG engine dc starter with wrong polarity connections? why?
what is metering cum synchronizing panel and how it is used?
How CFL &T5 tube light glows?
What is the purpose of stablization resistor in high impedance bus bar protection
Why High voltage are generate noise ?
what is meant by vector group of a transformer? How can it be derived?
I have a small system with two motors that are running on 380 vac, 60 hz. These motors are expensive and I usally get them from Brazil. I am adding another motor to the system, but I want to purchase a 480 vac, 60 hz motor to use. It will be on a VFD that is rated fro 380 thru 480. Is this posible and will I have to use a larger motor and derate it?
Explain with example of functional requirements of protection relay in terms reliability, selectivity, sensitivity
why should small green grass ans small plant should not be there inside the transformer Yard in the factories
