The User Manual of 580 Series General Frequency Converter

7.4.2 Cabling requirements

1) The routing of motor cable shall be kept away from other cable routing. The motor cables of frequency converters shall be routed side-by-side.

2) Motor cables, input power cables and control cables shall be distributed into different trunking and to avoid the electromagnetic interference caused by the quick change for frequency output voltage, motor cables and other long side-by-side routing of cables shall be avoided.

3) When control cables ass power cables unavoidably, the included angle between two cables shall keep 90° and other cables shall not be allowed to pass the frequency converter.

4) The power input line, power output line and weak signal line (control line) shall be avoided to distribute in parallel and they can be distributed vertically if it is available.

5) Cable trunking shall be connected excellently and the grounding shall be fine. Besides, The trunking of aluminum can be used to equipotent.

6) The filter, frequency converter and motor shall be connected with the system (mechanics and equipment) properly. The parts for installation can be protected by spraying and electric metal shall be contacted sufficiently.

Fig. 7-2 Cables distribution

7.5 Rectification measures for EMC interfered problems

The frequency converter belongs to strong interface equipments and when it is used, interference may still appear because of the existence of distribution and grounding. Besides, the following methods shall be used for rectification.

Table 7-4 Common EMC interference and treatment

Interference type	Rectification method
The trip for leakage circuit breaker	◆The motor shell shall be connected to PE terminals of drivers. ◆PE terminals of drivers shall be connected to Power Grid PE. ◆Input power cords shall be installed by a safety capacitor. ◆Input drive wire shall be rolled by a magnetic ring
The interference caused by the operation of drivers	◆PE terminals of drivers shall be connected to motor shell. ◆PE terminals of drivers shall be connected to Power Grid PE. ◆Input power cords shall be installed by a safety capacitor and rolled by a magnetic ring. ◆Interfered signal ports shall be installed by a capacitor or rolled by a magnetic ring. ◆Common ground connection between equipments
Communication interference	◆Motor shell is connected to PE terminals of drivers. ◆Power Grid PE is connected to PE terminals of drivers. ◆Input power cords shall be installed by a safety capacitor and rolled by a magnetic ring. ◆The matched resistance shall be added to communication line source and load terminal. ◆Communication common ground wire shall be added beyond communication line. ◆Shielding lines are used as communication lines and shielding layer shall be connected to common ground.
I/O interference	◆Capacitor filtering shall be increased by low speed DI and 0.1uF is advised. ◆Capacitor filtering shall be increased by AI and 0.22uF is advised.