Insulation test for stator windings

Insulation test for stator windings

• Place one prod of the tester on the stator pack and the other on the terminals of the first phase, then of the second and third. Check that the tester does not signal the passage of current. Change the stator if insulation is insufficient.

Continuity test of stator windings

• Check the tester terminals respectively on the terminals of phases 1-2, 1-3 and 2-3 and check that in all three cases the tester signals the passage of current. In the lack of continuity in the windings, change the stator.

Checking the anti-disturbance condenser on the rectifier

• Slacken the antidisturbance condenser connection tab (-) on the rectifier.
  - Connect the tester to B+ of the rectifier and to the slackened connection tab of the condenser and check that the electrical capacity is 1.8 ÷ 2.6 microfarad.

• If not, change the rectifier complete with anti-disturbance condenser.

CAUTION: After this check, discharge the condenser by short circuit to prevent the liquid detergent from setting on fire when cleaning the components.

Checking the rectifier

• Check that the wired rectifier is working properly using special equipment.
  - Connect the terminals of the test equipment to the following points of measurement:
  a) Stator frame and connection weldings.
  b) B+ and stator connection welding point.
  c) D+ stator connection welding point.
  The rectifier is in order if the tester dial is in the sector of both measurements. If one or more dodes are faulty, change the complete rectifier.