Measuring The Cable And Motor Insulation; Insulation Checks Of The Motor Cable - Danfoss VACON NX FI6 Operating Manual

Operating Guide | VACON® NX Inverters FI4-FI8
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 inverter and the motor are grounded.
4. Make sure to select the DC supply cable, the brake cable, and the motor cable correctly.
For information on cable selections, see:
• 6.1.3 Cable Selection and
• 6.1 Cable Connections
• 6.3 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 the grounding
symbol.
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 inverter.
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 FI4 to FI8
• 12.8 Technical Data
12. Make sure that there is no condensation on the surfaces of the inverter.
13. Make sure that there are no unwanted objects in the installation space.
14. Before connecting the inverter to DC supply, do a check of the installation and the condition of all the fuses (see
Fuse Sizes) 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 DC supply 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.
100 | Danfoss A/S © 2019.07
Dimensioning, 6.1.4 Cable Selection and Dimensioning, North America
9.3.1 Insulation Checks of the Motor Cable
9.3.2 Insulation Checks of the DC Supply Cable
9.3.3 Insulation Checks of the Motor
and related tables
6.5.1 Additional Instructions for Cable
AQ299433367205en-000101 / DPD00908
Commissioning
12.3 Cable and