Measuring The Cable And Motor Insulation; Insulation Checks Of The Motor Cable - Danfoss Vacon NXP Series Operating Manual

Operating guide | VACON® NXS/NXP Air-cooled
Procedure
1. Make sure that the motor is installed correctly.
2. Make sure that the motor is not connected to mains.
3. Make sure that the AC drive and the motor are grounded.
4. Make sure to select the mains cable, the brake cable, and the motor cable correctly.
For information on cable selections, see:
• 6.1.3 Cable Selection and Dimensioning
• 6.1 Cable Connections
• 6.2 EMC-compliant Installation
5. Make sure that the control cables are as far as possible from the power cables. See
Installation
6. Make sure that the shields of the shielded cables are connected to a grounding terminal that is identified with
7. Do a check of the tightening torques of all the terminals.
8. Make sure that no power correction capacitors are connected to the motor cable.
9. Make sure that the cables do not touch the electrical components of the drive.
10. Make sure that the common input +24 V is connected to an external power source and the ground of the digital input is connected
to ground of the control terminal.
11. Do a check of the quality and quantity of the cooling air.
For further information on cooling requirements, see:
• 5.2.1 General Cooling Requirements
• 5.2.2 Cooling of FR4 to FR9
• 5.2.3 Cooling of Standalone AC drives (FR10 to FR11)
• 12.8 VACON NXP Technical Data
12. Make sure that there is no condensation on the surfaces of the AC drive.
13. Make sure that there are no unwanted objects in the installation space.
14. Before connecting the drive to mains, do a check of the installation and the condition of all the fuses (see
Fuse Size Information) and other protective devices.

9.3 Measuring the Cable and Motor Insulation

Do these checks if necessary.
• The insulation checks of the motor cable, see
• The insulation checks of the mains cable, see
• The insulation checks of the motor, see

9.3.1 Insulation Checks of the Motor Cable

Context:
Use these instructions to check the insulation of the motor cable.
118 | Danfoss A/S © 2018.06
and related tables
9.3.1 Insulation Checks of the Motor Cable
9.3.2 Insulation Checks of the Mains Cable
9.3.3 Insulation Checks of the Motor
6.5.1 Additional Instructions for Cable
12.3.1 List of Cable and
Commissioning
DPD00910G