Commissioning vacon • 60
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6
6.3 Running the motor
MOTOR RUN CHECK LIST
6.3.1 Cable and motor insulation checks
1. Motor cable insulation checks
Disconnect the motor cable from terminals U, V and W of the AC drive and from the motor.
Measure the insulation resistance of the motor cable between each phase conductor as well as
between each phase conductor and the protective ground conductor. The insulation resistance
must be >1MΩ at ambient temperature of 20°C.
2. Mains cable insulation checks
Disconnect the mains cable from terminals L1, L2 and L3 of the AC drive and from the mains.
Measure the insulation resistance of the mains cable between each phase conductor as well as
between each phase conductor and the protective ground conductor. The insulation resistance
must be >1MΩ at ambient temperature of 20°C.
3. Motor insulation checks
Disconnect the motor cable from the motor and open the bridging connections in the motor
connection box. Measure the insulation resistance of each motor winding. The measurement
voltage must equal at least the motor nominal voltage but not exceed 1000 V. The insulation
resistance must be >1MΩ at ambient temperature of 20°C.
Before starting the motor, check that the motor is mounted properly and ensure
that the machine connected to the motor allows the motor to be started.
Set the maximum motor speed (frequency) according to the motor and the machine
connected to it.
Before reversing the motor make sure that this can be done safely.
Make sure that no power correction capacitors are connected to the motor cable.
Make sure that the motor terminals are not connected to mains potential.
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