how we can check that any motor is faulty may be single phase or three phase?

how we can check that any motor is faulty may be single
phase or three phase?

Question Posted / satya jeet verma

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how we can check that any motor is faulty may be single phase or three phase?..

Answer / p.senthil kumar

1.you can check the ohmic value by using multi meter in
between r-y,y-b,r-b of motor windings & it must be the same
ohmic value for fine motor winding.
2.also check insullation value of each winding R,Y,B with
reference to earth.in that megger meter must shown infinite
value for fine motor winding condition.if it is shown zero
motor stator winding is defective.
3.for single phase check for connectivity of winding in
between running & starting winding.also check for a faulty
capacitor.

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how we can check that any motor is faulty may be single phase or three phase?..

Answer / monika hassan

sigle phase or three phase the test protocols are same as
per IS325. By conducting priliminary test like IR value
measurement, resistance measurement, No-load run test etc.
all these tests ensures the healthy ness of the machine.

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