Start Up Check List - Danfoss VLT AutomationDrive Operating Instructions Manual

Start Up and Functional Tes...

3.1.2 Start Up Check List

CAUTION
Before applying power to the unit, inspect the entire installation as detailed in Table 3.1. Check mark those items when
completed.
Inspect for
Auxiliary equipment
3 3
Cable routing
Control wiring
Cooling clearance
EMC considerations
Environmental considerations
Fusing and circuit breakers
Grounding
Input and output power wiring
Panel interior
Switches
Vibration
Table 3.1 Start Up Check List
22
®
VLT AutomationDrive Operating
Instructions
Description
•
Look for auxiliary equipment, switches, disconnects, or input fuses/circuit breakers
that may reside on input power side of frequency converter or output side to
motor. Examine their operational readiness and ensure that they are ready in all
respects for operation at full speed.
•
Check function and installation of any sensors used for feedback to frequency
converter
•
Remove power factor correction caps on motor(s), if present
•
Ensure that input power, motor wiring, and control wiring are separated or in
three separate metallic conduits for high frequency noise isolation
•
Check for broken or damaged wires and loose connections
•
Check that 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.
•
Measure that top and bottom clearance is adequate to ensure proper air flow for
cooling
•
Check for proper installation regarding electromagnetic compatibility
•
See equipment label for the maximum ambient operating temperature limits
•
Humidity levels must be 5-95% non-condensing
•
Check for proper fusing or circuit breakers
•
Check that all fuses are inserted firmly and in operational condition and that all
circuit breakers are in the open position
•
The unit requires a ground wire from its chassis to the building ground
•
Check for good ground connections that are tight and free of oxidation
•
Grounding to conduit or mounting the back panel to a metal surface is not a
suitable ground
•
Check for loose connections
•
Check that motor and mains are in separate conduit or separated screened cables
•
Inspect that the unit interior is free of dirt, metal chips, moisture, and corrosion
•
Ensure that all switch and disconnect settings are in the proper position
•
Check that the unit is mounted solidly or that shock mounts are used, as
necessary
•
Look for any unusual amount of vibration the unit may be subjected to
®
MG.33.AJ.02 - VLT is a registered Danfoss trademark
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