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6.3
Checking the insulation resistance
Notes for checking the insulation resistance
Risk of electric shock
If you check the insulation resistance using high voltage on a plant/machine equipped with
direct drives or directly at the motors, this can damage the motor insulation! Examples
necessitating that the insulation resistance is checked include the installation test,
preventive maintenance and troubleshooting.
• Only use test equipment that is in compliance with DIN EN 61557-1, DIN EN 61557-2
• The test may only be carried out with a maximum direct voltage of 1000 V for a
• Measure the insulation resistance with respect to the PE connection or the motor
• If a higher DC or AC voltage is necessary to test the machine/plant, you must coordinate
• Carefully observe the operating instructions of the test equipment!
Always proceed as follows when testing the insulation resistance of individual motors:
1. Connect all winding and temperature sensor connections with each other; the test voltage
must not exceed 1000 V DC, 60 s with respect to PE connection.
2. Connect all temperature sensor connections to the PE connection and all winding
connections with each other; the test voltage must not exceed 1000 V DC, 60 s, winding
with respect to PE connection.
Each insulation resistance must be at least 10 MΩ, otherwise the motor insulation is
defective.
Risk of death due to electric shock!
During and immediately after the measurement, in some instances, the terminals are at
hazardous voltage levels, which can result in death if touched.
• Never touch the terminals during or immediately after measurement.
Naturally cooled 1FW6 built-in torque motors
Operating Instructions, 07/2017, 6SN1197-0AF02-0BP2
WARNING
and DIN EN 61010-1 or the corresponding IEC standards.
maximum time of 60 s!
enclosure.
the test with your local Siemens office!
WARNING
Commissioning
6.3 Checking the insulation resistance
85
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