Electrical Motor maintenance Flashcards
1
Q
how would you overhaul an eletric motor that has been flooded with sea water
A
risk assess ptw loto remove and dismantle prove dead wash out with distilled water dry out the motor monitor the resistantce change bearing and seals if necessary reassemble and do onload test
2
Q
how you you do an insulation resistance test
A
with the ir tester you would test phase to phase and phase to earth, the tester must be se to a higher value than the motors voltage, it must be isolate when doing this
3
Q
minimum acceptable value for insulation resistance test
A
1 Mega OHM
4
Q
what piece of equipment for and insulation resistance test
A
insulation resistance tester
5
Q
regular maintenance that is required good operation of an electrical motor
A
change bearings and seals regular on load testing clean casing clean and check fan check windings check cables for damage check the terminal box check the the motors not over heating no abnormal noises no vibrations
6
Q
what would you do if a motor fails to start
A
check supply
check starter cabinet for any issues
go and check the motor
do tests on the motor
7
Q
procedure to remove a motor for changing
A
risk assess ptw loto prove dead isolate dismantle take not of how the terminal box was for putting it back
