Vacon 100 Installation Manual

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Contents

Vacon 100 Installation Manual Manual pdf 46 page image

7.2 OPERATION OF THE MOTOR7.2.1 CHECKS BEFORE STARTING THE MOTORBefore you start the motor, do these checks.• Make sure that all the START and STOP switches that are connected to the I/O terminalsare in the STOP position.• Make sure that you can start the motor safely.• Activate the Start-up wizard. See the Application Manual for the AC drive that you have.• Set the maximum frequency reference (that is, the maximum speed of the motor), sothat it agrees with the motor and the device that is connected to the motor.7.3 MEASURING THE CABLE AND MOTOR INSULATIONThe insulation checks of the motor cable1. Disconnect the motor cable from the terminals U, V, and W and from the motor.2. Measure the insulation resistance of the motor cable between phase conductors 1 and 2,between phase conductors 1 and 3, and between phase conductors 2 and 3.3. Measure the insulation resistance between each phase conductor and the earthconductor.4. The insulation resistance must be >1 MΩ at the ambient temperature of 20 °C (68 °F).The insulation checks of the mains cable1. Disconnect the mains cable from the terminals L1, L2, and L3 and from mains.2. Measure the insulation resistance of the mains cable between phase conductors 1 and 2,between phase conductors 1 and 3, and between phase conductors 2 and 3.3. Measure the insulation resistance between each phase conductor and the earthconductor.4. The insulation resistance must be >1 MΩ at the ambient temperature of 20 °C (68 °F).The insulation checks of the motor1. Disconnect the motor cable from the motor.2. Open the bridging connections in the motor connection box.3. Measure the insulation resistance of each motor winding. The voltage must be the sameor higher than the motor nominal voltage, but not higher than 1000 V.4. The insulation resistance must be >1 MΩ at the ambient temperature of 20 °C (68 °F).5. Obey the instructions of the motor manufacturer.7.4 INSTALLATION IN AN IT SYSTEMIf your mains is impedance-grounded (IT), the AC drive must have the EMC protection levelC4. If your drive has the EMC protection level C3, it is necessary to change it to C4. To do this,remove the EMC jumper.WARNING!Do not make changes in the AC drive when it is connected to mains. Thecomponents of the drive are live when the drive is connected to mains.VACON · 46 COMMISSIONING AND ADDITIONAL INSTRUCTIONS7 TEL. +358 (0)201 2121 · FAX +358 (0)201 212 205