4.8 Installation Check List
Before completing installation of the unit, inspect the entire installation as detailed in Table 4.1. Check and mark the items
when completed.
Inspect for Description
☑
Auxiliary equipment
•
Look for auxiliary equipment, switches, disconnects, or input fuses/circuit breakers, residing on the input
power side of the frequency converter, or output side to the motor. Ensure that they are ready for full-
speed operation.
•
Check the function and installation of any sensors used for feedback to the frequency converter.
•
Remove any power factor correction caps on the motor.
•
Adjust any power factor correction caps on the mains side and ensure that they are dampened.
Cable routing
•
Ensure that the motor wiring and control wiring are separated, shielded, or in 3 separate metallic conduits
for high frequency interference isolation.
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 clearance
•
Ensure that the top and bottom clearance is adequate to ensure proper airow for cooling, see
chapter 3.3.1 Mounting.
Ambient conditions
•
Check that requirements for ambient conditions are met.
Fusing and circuit
breakers
•
Check for proper fusing or circuit breakers.
•
Check that all fuses are inserted rmly and are in operational condition, and that all circuit breakers are in
the open position.
Grounding
•
Check for sucient ground connections and ensure that those connections are tight and free of oxidation.
•
Grounding to conduit, or mounting the back panel to a metal surface, is not a suitable grounding.
Input and output
power wiring
•
Check for loose connections.
•
Check that the motor and mains cables are in separate conduit or separated shielded cables.
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.
Table 4.1 Installation Check List
CAUTION
POTENTIAL HAZARD IN THE EVENT OF INTERNAL FAILURE
Risk of personal injury if the frequency converter is not properly closed.
•
Before applying power, ensure that all safety covers are in place and securely fastened.
Electrical Installation
VLT
®
AutomationDrive FC 301/302
16 Danfoss A/S © 05/2018 All rights reserved. MG33AT02
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