Checking The Insulation Resistance (Wall Mounted) - Siemens SINAMICS G115D Operating Instructions Manual

Additional information on the SIMOGEAR geared motor
12.2 Specific data motor
12.2.12

Checking the insulation resistance (Wall Mounted)

Only qualified personnel may work on power installations.
Unintentional starting of the drive unit
Secure the drive unit to prevent it from being started up unintentionally.
Attach a warning notice to the start switch.
Hazardous voltage and rotating parts
Before starting commissioning, mount the covers required for the correct air guidance.
Prevent contact with active, live or rotating parts.
Hazardous voltage at the terminals
The terminals can be at hazardous voltage levels during the measurement and immediately
afterwards. The terminals must not be touched.
With the power cables connected, check that no voltage is applied.
Note
Check the insulation resistance before commissioning and after longer periods of storage or
non-operational periods.
Before you begin measuring the insulation resistance, read the operating manual for the
insulation resistance meter you are going to use. If a main circuit line is already connected for
measuring the insulation resistance, remove it from the terminals.
Note
If the critical insulation resistance is less than or equal to this value, then the windings must be
dried or, if the rotor is removed, cleaned thoroughly and dried.
After drying cleaned windings remember that the insulation resistance is lower for a warm
winding. The insulation resistance can only be properly assessed after conversion to the
reference temperature of +25 °C.
If the measured value is close to the critical value, you must check the insulation resistance at
suitably frequent intervals.
Measure the minimum insulation resistance of the winding with respect to the motor
enclosure at a winding temperature between +20 °C and +30 °C. Different insulation
resistance values apply for deviating temperatures. When making the measurement, wait
for 1 minute for the final resistance value to be reached.
Measure the critical insulation resistance at the operating temperature of the winding.
460
WARNING
WARNING
WARNING
SINAMICS G115D Wall Mounted distributed drive
Operating Instructions, 07/2023, FW V4.7 SP14, A5E52808211A AA