Danfoss VLT FC 102 Installationshandbuch Seite 5

VLT® Frequency Converters, 90–400 kW
Installation Guide
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.

ELECTRICAL SHOCK AND FIRE HAZARD
The drive can cause a DC current in the ground conductor. Failure to use a Type B residual current-operated
protective device (RCD) can lead to the RCD not providing the intended protection which can result in death,
fire, or other serious hazard.
Use an RCD device.

When an RCD is used for protection against electrical shock or fire, use only a Type B device on the supply

side.
INDUCED VOLTAGE
Induced voltage from output motor cables that run together can charge equipment capacitors, even with
the equipment turned off and locked out/tagged out. Failure to run output motor cables separately, or to use
shielded cables, could result in death or serious injury.
Run output motor cables separately or use shielded cables.

Simultaneously lock out/tag out all the drives.

ELECTRICAL SHOCK HAZARD
Due to the stray capacitance of the shielded motor cable, the leakage currents exceed 3.5 mA. Failure to
properly ground the drive can result in death or serious injury.
Ensure that minimum size of the ground conductor complies with the local safety regulations for high

touch current equipment.
Use a reinforced ground conductor according to IEC 60364-5-54 cl. 543.7 or local safety regulations for

equipment with leakage current >3.5 mA.
For reinforced grounding:

Use a ground conductor with a cross-section of at least 10 mm
ground conductor of the same cross-sectional area as the original ground conductor as specified by IEC 60364-5-54,
with a minimum cross-sectional area of 2.5 mm
mechanically protected.
Use a ground conductor inside an enclosure or otherwise protected throughout its length against mechanical
damage.
Use a ground conductor that is part of a multi-conductor power cable with a minimum PE conductor cross-section
of 2.5 mm
power cable must be installed with an appropriate strain relief.
Danfoss A/S © 2024.06
CAUTION
WARNING
WARNING
WARNING
2
(14 AWG) that is permanently connected or plugged in by an industrial connector. The multi-conductor
2
(8 AWG) Cu or 16 mm
2
(14 AWG) mechanically protected or 4 mm
AN41701949085201-000201 / 130R1260 |
Installation
2
(6 AWG) Al, or an extra
2
(12 AWG) not
5