Breaker And Electromagnetic Contactor; Cable Arrangement; Insulation Inspection - INVT Goodrive350 Series Operation Manual

Goodrive350 series high-performance multi-function inverter
D.4.3 Cable arrangement
Motor cables must be arranged away from other cables. The motor cables of several inverters can be
arranged in parallel. It is recommended that you arrange the motor cables, input power cables, and
control cables separately in different trays. The output dU/dt of the inverters may increase
electromagnetic interference on other cables. Do not arrange other cables and the motor cables in
parallel.
If a control cable and power cable must cross each other, ensure that the angle between them is 90
degrees.
The cable trays must be connected properly and well grounded. Aluminum trays can implement local
equipotential.
The following figure shows the cable arrangement distance requirements.
Input power cable
Min. distance:
Control cable
D.4.4 Insulation inspection
Check the motor and the insulation conditions of the motor cable before running the motor.
1. 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 inverter.
2. Use a megameter of 500 V 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: The insulation resistance is reduced if it is damp inside the motor. If it may be damp, you
need to dry the motor and then measure the insulation resistance again.
D.5 Breaker and electromagnetic contactor
You need to add a fuse to prevent overload.
You need to configure a manually manipulated molded case circuit breaker (MCCB) between the AC
power supply and inverter. The breaker must be locked in the open state to facilitate installation and
inspection. The capacity of the breaker needs to be 1.5 to 2 times the rated current of the inverter.

200 mm
Cable arrangement distances
According to the working principle and structure of breakers, if the
manufacturer's regulation is not followed, hot ionized gases may escape
from the breaker enclosure when a short-circuit occurs. To ensure safe use,
exercise extra caution when installing and placing the breaker. Follow the
manufacturer's instructions.
Motor cable
Power cable
Motor cable
Min. distance: 500 mm
-318-
Appendix D
Min. distance:
300 mm
Control cable