Chapter 2 Installation and Wiring
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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 touching 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 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 earthing cable can’t be
shared with other equipment. The size of main circuit earthing 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., left in the inverter,
whether the bolts are fastened firmly, whether the bare cable of terminals are
shorted to other terminals.
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