Electrical Installation; Insulation Inspection; Cable Selection And Routing; Cable Selection - INVT Goodrive390L Series User Manual

Goodrive390L Series Lift-Dedicated VFD

4.1 Insulation inspection

Do not perform any voltage endurance or insulation resistance tests, such as
high-voltage insulation tests or using a megameter to measure the insulation resistance,
on the VFD or its components. Insulation and voltage endurance tests have been
performed between the main circuit and chassis of each VFD before delivery. In addition,
voltage limiting circuits that can automatically cut off the test voltage are configured
inside the VFDs. If you need to perform insulation resistance test on the VFD, please
contact us.
Note: Remove the cable connection terminals from the VFD, then perform the
insulation resistance test on the input and output power cables.
Input power cable

Check the insulation conditions of the input power cable of a VFD according to the local
regulations before connecting it.
Motor cable

Ensure that the motor cable is connected to the motor, and then remove the motor cable
from the U, V, and W output terminals of the VFD. Use a megohmmeter of 500V DC to
measure the insulation resistance between each phase conductor and the protection
grounding conductor. For details about the insulation resistance of the motor, see the
description provided by the manufacturer.
Note: If the motor inside is damp, the insulation resistance is reduced. If you suspect
the inside of motor is moist, dry and re-measure the motor.

4.2 Cable selection and routing

4.2.1 Cable selection

Power cable

Power cables mainly include input power cables and motor cables. To meet the EMC
requirements stipulated in the CE standards, it is recommended to use symmetrical
shielded cables as motor cables and input power cables. For details, see section
Power cable.
Note: If the electrical conductivity of the motor cable shield layer does not meet the
requirements, a separate PE conductor must be used.
202403 (V1.0）

4 Electrical installation

Electrical installation
E.1.1
17