Checking The Insulation Resistance - Siemens Simotics T-1FW6 Operating Instructions Manual

Commissioning

6.3 Checking the insulation resistance

6.3 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.
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.
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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.
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Each insulation resistance must be at least 10 MΩ. A lower insulation resistance indicates
that the motor insulation is damaged.
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.
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WARNING
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 motors 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.
WARNING
Never touch the terminals during or immediately after measurement.
1FW6 external rotor built-in torque motors Operating
Instructions, 12/2020, A5E49196960B AB