Danfoss VLT AutomationDrive FC 301 Operating Manual page 21

VLT® AutomationDrive FC 301/FC 302
Operating Guide
Inspect for Description
Control wiring
• Check for broken or damaged wires and loose connections.
• Check that the control wiring is isolated from power and motor wiring for noise immunity.
• Check the voltage source of the signals, if necessary.
The use of shielded cable or twisted pair is recommended. Ensure that the shield is terminated correctly.
Cooling clear-
• Ensure that the top and bottom clearance is adequate to ensure proper airflow for cooling, see
ance
Cooling.
Ambient con-
• Check that requirements for ambient conditions are met.
ditions
Fusing and cir-
• Check for proper fusing or circuit breakers.
cuit breakers
• Check that all fuses are inserted firmly and are in operational condition, and that all circuit breakers are
in the open position.
Grounding
• Check for sufficient ground connections and ensure that those connections are tight and free of oxida-
tion.
• Grounding to conduit, or mounting the back panel to a metal surface, is not a suitable grounding.
Input and out-
• Check for loose connections.
put power wir-
• Check that the motor and mains cables are in separate conduit or separated shielded cables.
ing
Panel interior
• Inspect that the unit interior is free of dirt, metal chips, moisture, and corrosion.
• Check that the unit is mounted on an unpainted metal surface.
Switches
• Ensure that all switch and disconnect settings are in the proper positions.
Vibration
• Check that the unit is mounted solidly, or that shock mounts are used, as necessary.
• Check for an unusual amount of vibration.
INTERNAL FAILURE HAZARD
An internal failure in the drive can result in serious injury when the drive is not properly closed.
-
Ensure that all safety covers are in place and securely fastened before applying power.
Danfoss A/S © 2021.01
C A U T I O N
Electrical Installation
3.3.1
AQ267037727118en-000101 / 130R0300 | 21
√