Illustration 3.3: Bottom view of FCD 303-315
Illustration 3.4: Bottom view of FCD 322-330
3.3 General Information about Electrical Installation
3.3.1 High Voltage Warning
The voltage of the frequency converter is dangerous whenever the equipment is connected to mains. Incorrect installation of the motor
or frequency converter may cause damage to the equipment, serious injury or death. Comply with the instructions in this manual, as
well as national and local rules and safety regulations.
Touching the electrical parts may be fatal - even after the equipment has been disconnected from mains: Wait at least 4 minutes for
current dissipate.
NB!
It is the responsibility of the user or installer to ensure correct earthing and protection in accordance with national and local standards.
3.3.2 Cables
The control cable and the mains cable should be installed separately from motor cables to prevent noise transfer. As a rule a distance of 20 cm is sufficient,
but it is recommended that the distance is as great as possible, particularly when cables are installed in parallel over large distances.
For sensitive signal cables such as telephone or data cables the greatest possible distance is recommended. Please note that the required distance depends
on the installation and the sensitivity of the signal cables, and that for this reason exact values cannot be given.
When being placed in cable trays, sensitive cables may not be placed in the same cable tray as the motor cable. If signal cables run across power cables,
this is done at an angle of 90 degrees. Remember that all noise-filled inlet and outlet cables to a cabinet must be screened/armoured.
See also
EMC-compliant electrical installation
.
Cable glands
It must be assured that appropriate cable glands needed for the environment are chosen and carefully mounted.
3 Installation
VLT
®
Decentral FCD 300 Design Guide
40
MG.90.S1.02 - VLT
®
is a registered Danfoss trademark
3
