Commissioning; Safety Instructions - Danfoss VLT FC 102 Operating Instructions Manual

Commissioning

5 Commissioning

5.1 Safety Instructions

See chapter 2 Safety for general safety instructions.
WARNING
HIGH VOLTAGE
Frequency converters contain high voltage when
connected to AC mains input power. Failure to perform
installation, start-up, and maintenance by qualified
personnel could result in death or serious injury.
•
Installation, start-up, and maintenance must be
performed by qualified personnel only.
Before applying power:
1. Close the cover properly.
2. Check that all cable glands are firmly tightened.
3. Ensure that input power to the unit is OFF and
locked out. Do not rely on the frequency
CAUTION
Before applying power to the unit, inspect the entire installation as detailed in Table 5.1. Check mark those items when
completed.
Inspect for Description
•
Auxiliary equipment Look for auxiliary equipment, switches, disconnects, or input fuses/circuit breakers 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 function and installation of any sensors used for feedback to the frequency converter.
•
Remove power factor correction capacitors on motors, if present.
•
Cable routing Use separate metallic conduits for each of the following:
•
Control wiring 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.
•
Use screened or twisted pair cable. Ensure that the screen is terminated correctly.
•
Cooling clearance Measure that top and bottom clearance is adequate to ensure proper air flow for cooling.
•
EMC considerations Check for proper installation regarding electromagnetic compatibility.
•
Environmental consider- See equipment label for the maximum ambient operating temperature limits.
ations
•
Humidity levels must be 5–95%, non-condensing.
•
Fusing and circuit Check for proper fusing or circuit breakers.
breakers
•
Check that all fuses are inserted firmly and in operational condition, and that all circuit breakers are
in the open position.
MG16I302
Operating Instructions
- Input power
- Motor wiring
- Control wiring
Danfoss A/S © 04/2015 All rights reserved.
converter disconnect switches for input power
isolation.
4. Verify that there is no voltage on input terminals
L1 (91), L2 (92), and L3 (93), phase-to-phase, and
phase-to-ground.
5. Verify that there is no voltage on output
terminals 96 (U), 97 (V), and 98 (W), phase-to-
phase, and phase-to-ground.
Confirm continuity of the motor by measuring Ω
6.
values on U-V (96-97), V-W (97-98), and W-U
(98-96).
7. Check for proper grounding of the frequency
converter as well as the motor.
8. Inspect the frequency converter for loose
connections on the terminals.
9. Confirm that the supply voltage matches the
voltage of the frequency converter and the
motor.
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