Chapter 3 Mechanical and Electrical Installation
ACH200 Series High Voltage Variable Frequency Speed Control System Operating Manual
26
Figure.3-3
Note:
High-voltage and low-voltage lines must be strictly separated; cable trenches must be of
flame-retardant material, smooth, moisture-proof, dust-proof and protected from small animals.
1) Power cable
●
The wiring of the mains and motor cables must comply with local standards and refer to the
cable manufacturer's instructions and recommendations.
●
For optimum EMC characteristics, individually shielded armoured phase cables are
recommended; if single phase cables are used, the three phase cables must be combined to ensure
EMC characteristics.
●
If the cross-sectional area of the cable shield is less than 50% of the cross-sectional area of one
phase, an additional ground wire must be added along the cable to avoid overheating of the cable
shield. Please consult your local regulations for details.
●
The distance between the layers of cable supports, ladder racks or trays inside the cable trench
should meet the requirements for easy laying of cables and their fixing and placement of joints, and
for the replacement or addition of any of the cables and their joints in the case of multiple cables
placed on the same layer.
●
The distance between the layers of cable supports, ladder racks or trays should be greater than
300 mm. the minimum clear distance of the lowermost support from the bottom of the trench should
be greater than 100 mm.
●
The cables are fixed to the brackets and when installed horizontally, power cables and control
