Standard Commissioning Process 31
• If the motor star point is reachable, measure each phase separately as shown below.
Insulation resistance measuring when star point is reachable (3 measuring values)
• If the star point is not reachable, measure all phases together as shown below.
Insulation resistance measuring when star point is not reachable (1 measuring value)
• If the reading is too low, dry the motor windings according to instructions in the motor
documentation.
Power Cables Insulation Test
Measure the insulation resistance of all power cables and write down the measured
results.
Measurements have to be made between all phases (all cables apart from each other) and
between all cables and ground (all cables bound together at one end). Record the lowest
value for each measurement.
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