Interested to Buy Any Domain ? << Click Here >> for more details...
how to check a three phase induction motor by multimeter &
megger?
- 2 Answers
- 20151 Views
- I also Faced
- E-Mail Answers
Answer Posted / will bg
Prove your meter/megger on a known resistance block. You
should remove any star or delta connection/bridges if at all
possible. If your earth/ground reference is not the motor
frame itself (i.e. a conductor in a cable) then first prove
your earth/ground by measuring on ohms the resistance
between your earth test point to various places on the motor
frame. You should get almost 0 ohms. Now measure your
phase resistances and they should always be fairly equal.
Rule of thumb is 10% variance. Remember the bigger the
motor the lower the resistance. Now on 500 volts DC measure
all phases to earth. Now switch megger to 1000V DC and
measure phase to phase resistance.
| Is This Answer Correct ? | 6 Yes | 7 No |
Post New Answer View All Answers
What is your acheivements
if we apply 1000ADC instead of 100ADC or We apply 50ADC instead of 100ADC,What will be happened in the test result value.Pl explain
IF I KNOW THE AREA OF CROSS SECTION OFTHE WIRE , WATTAGE OF THE LOAD ,VOLTAGE SUPPLY WHAT IM GIVING TO THE LOAD AND ALSO POWER FACTOR OF LOAD ....... SO GIVE ME FOR WHAT AMOUNT OF CURRENT I SHOULD USE WHICH TYPE OF CABLE?
could you measure current in parallel?
hai friends i have BSNL JTO exam on next month so if any body have model question paper or give preparation tips to my mail id kumar4486@yahoo.co.in this will helpfull for my future .plz & thank u by kumar
How shall i select the value of capacitor or inductor in a system?
what happen if drive input fail momentry at 48.5 HZ frequency?
Is better to supply the voltage for static exciter from the auxiliary power source or from the SG terminals? And why?
what the principle of sincroscope?how it works?when it needed?
could an induction motor be used for regenerative braking in electric-train control? in this type of application would some scheme have to be devised to obtain low synchronous speeds while braking? would induction-motor drive, therefore, be suitable for passenger service?
can anyone please help me to find the rupturing or breaking capacity in KA of circuit breaker (MCCB,VCB,ACB etc) of HT and LT side of a distribution transformer...please help with detailed step by step answer...thank you
Main advantage of auto transformer over two windings transformer is that A it needs no cooling B it uses only one winding C core losses are reduced D it has simple construction
what kvrah y we need to take the readind of that
how can i reduce sparking without stepdowning the voltage
a 230v transformer with step down ratio 19:1.it has 2000turns on primary and rated 25va calculate max primary current no of secondary turns volts/turn
