Siemens SIMOTICS T-1FW68, Configuration Manual

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Mechanical properties
3.5 Service and inspection intervals
1FW68 radial segment motors
Configuration Manual, 08/2021, A5E51132930B AA
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CAUTION
Sharp edges and falling objects
Sharp edges can cause cuts and falling objects can injure feet.
• Always wear safety shoes and safety gloves!
3.5.2 Checking the insulation resistance
Notes for checking the insulation resistance
Installation inspection, preventive maintenance and troubleshooting are examples of
required checking of the insulation resistance on a machine/system with direct drives or
directly on the motors.
WARNING
Risk of electric shock
If you check the insulation resistance using high voltage, this can damage the motor
insulation. There is a risk of death or serious injury if energized parts are touched.
• Only use test equipment that is in compliance with EN 61557-1, EN 61557-2 and
EN 61010-1 or the corresponding IEC standards.
• Check the insulation resistance on the individual stator segments only according to
the following procedure.
• If a DC voltage > 1000 V or an AC voltage is necessary to test the machine/system,
coordinate this test with your local Siemens office.
• Carefully observe the operating instructions of the test device.
Procedure
1. Interconnect all winding and temperature sensor connections. Check against the PE
connection or the motor enclosure with a maximum voltage of 1000 VDC for maximally
60 s.
2. Connect all temperature sensor connections to the PE connection and interconnect all
winding connections. Check the winding against the PE connection or the motor
enclosure with a maximum voltage of 1000 VDC for maximally 60 s.
❒
Each insulation resistance must be at least 10 M Ω . A lower insulation resistance
indicates that the motor insulation is damaged.