6vacon • 84 ELECTRICAL CABLING AND CONNECTIONS6.1.10 Cable and motor insulation checks1. Motor cable insulation checksDisconnect the motor cable from terminals U, V and W of the frequency converter and fromthe motor. Measure the insulation resistance of the motor cable between each phaseconductor as well as between each phase conductor and the protective ground conductor.2. Mains cable insulation checksDisconnect the mains cable from terminals L1, L2 and L3 of the frequency converter andfrom the mains. Measure the insulation resistance of the mains cable between each phaseconductor as well as between each phase conductor and the protective ground conductor.The insulation resistance must be at least 1…2 MΩ.3. Motor insulation checksDisconnect the motor cable from the motor and open the bridging connections in the motorconnection box. Measure the insulation resistance of each motor winding. The measurementvoltage must equal at least the motor nominal voltage but not exceed 1000 V. The insulationresistance must be at least 1…2 MΩ.Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
