installation vacon
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between each phase conductor as well as between each phase conductor and the
protective ground conductor.
The insulation resistance must be >1 MOhm.
2. Mains cable insulation checks
Disconnect the mains cable from terminals L1, L2 / N and L3 of the frequency con-
verter and from the mains. Measure the insulation resistance of the mains cable be-
tween each phase conductor as well as between each phase conductor and the
protective ground conductor. The insulation resistance must be >1 MOhm.
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 >1 MOhm.
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