User manual

Chapter 2 Installation and Wiring
38
2.7 Wiring Attention
● Be sure the input power supply of the inverter is cut off then you can remove or replace
the motor.
● Be sure the inverter has stopped output then you can switch the motor or the power
supply.
● If a peripheral (brake unit, reactor, filter) is added, test the insulation resistance of the
peripheral to earth first and be sure the value not below 4 MΩ.
● Besides shielding the input signal cable and the cable of frequency meter, the cables
should be disposed solely, not parallel with the main circuit cable, and far away from
it as possible.
● In order to avoid error action caused by molestation, the control circuit cable should
use stranding shielded cables, and the wiring distance should be less than 50 meters.
● Be sure the shielded layers of shielded cables are not touch other signal cables or shell
of equipment, you can use insulating tape to enswathe the bare shielding layer.
● The withstand voltage of all the cables should match with the voltage class of the
inverter.
● In order to prevent accident, be sure that the control circuit terminal ”PE” and the main
circuit terminal “PE” are connected to earth, and the earthling cable can’t be shared
with other equipment. The size of main circuit earthling cable should be more than
one and a half of the main circuit cable. After completion of wiring, please check
whether a cable, a bolt or a connection end .etc., was remained in the inverter, whether
the bolts were fastened firmly, whether the bare cable of terminals were shorted to
other terminals.