Danfoss VLT AutomationDrive FC 301 Series Design Manual page 125

Electrical Installation
9 Electrical Installation
9.1 Safety
See chapter 2 Safety for general safety instructions.
WARNING
INDUCED VOLTAGE
Induced voltage from output motor cables that run
together can charge equipment capacitors even with the
equipment turned off and locked out. Failure to run
output motor cables separately or use shielded cables or
metal conduits could result in death or serious injury.
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run output motor cables separately, or
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use shielded cables or metal conduits
CAUTION
SHOCK HAZARD
The adjustable frequency drive can cause a DC current in
the PE conductor.
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When a residual current-operated protective
device (RCD) is used for protection against
electrical shock, only an RCD of Type B is
permitted on the supply side.
Failure to follow the recommendation means the RCD
may not provide the intended protection.
WARNING
LEAKAGE CURRENT HAZARD
Leakage currents exceed 3.5 mA. Failure to ground the
adjustable frequency drive properly could result in death
or serious injury.
•
Ensure correct grounding of the equipment by
a certified electrical installer.
MG33BF22
Design Guide
For electrical safety
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For EMC-compliant installation
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NOTICE!
POTENTIAL EQUALIZATION
Risk of electrical interference, when the ground potential
between the adjustable frequency drive and the system
is different. Install equalizing cables between the system
components. Recommended cable cross-section: 16 mm
WARNING
LEAKAGE CURRENT HAZARD
Leakage currents exceed 3.5 mA. Failure to ground the
adjustable frequency drive properly could result in death
or serious injury.
•
Rev. 2014-04-04 All rights reserved.
Ground the adjustable frequency drive in
accordance with applicable standards and
directives.
Use a dedicated ground wire for input power,
motor power and control wiring.
Do not ground one adjustable frequency drive to
another in a "daisy chain" fashion.
Keep the ground wire connections as short as
possible.
Follow the motor manufacturer wiring
requirements.
Minimum cable cross-section: 10 mm
ground wires terminated separately).
Establish electrical contact between cable shield
and adjustable frequency drive enclosure by
using metal cable connectors or by using the
clamps provided on the equipment (see
chapter 9.4 Motor Connection).
Use high-strand wire to reduce electrical
interference.
Do not use pigtails.
Ensure correct grounding of the equipment by
a certified electrical installer.
2
(or 2 rated
9 9
2 .
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