Electrical Installation; Safety Instructions; Emc Compliant Installation; Power Connections - Danfoss VLT FC 102 Operating Instructions Manual

Electrical Installation

4 Electrical Installation

4.1 Safety Instructions

See chapter 2 Safety for general safety instructions.
WARNING
4 4
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 screened cables
could result in death or serious injury.
•
Run output motor cables separately, or
•
Use screened cables.
CAUTION
SHOCK HAZARD
The frequency converter can cause a DC current in the
PE conductor. Failure to follow the recommendation
means that the RCD may not provide the intended
protection.
•
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.
Overcurrent protection
•
Extra protective equipment, such as short-circuit
protection or motor thermal protection between
frequency converter and motor, is required for
applications with multiple motors.
•
Input fusing is required to provide short-circuit
and overcurrent protection. If not factory-
supplied, the installer must provide fuses. See
maximum fuse ratings in chapter 8.4 Fuses.
Wire type and ratings
•
All wiring must comply with local and national
regulations regarding cross-section and ambient
temperature requirements.
•
Power connection wire recommendation:
Minimum 75 °C rated copper wire.
See chapter 8.3 General Technical Data and
chapter 8.1 Power-Dependent Specifications for
recommended wire sizes and types.
36
®
VLT HVAC Drive FC 102 Low Harmonic Drive

4.2 EMC Compliant Installation

To obtain an EMC-compliant installation, follow the
instructions provided in chapter 4.4 Grounding,
chapter 4.3 Power Connections, chapter 4.6 Motor
Connection, and chapter 4.8 Control Wiring.

4.3 Power Connections

NOTICE
Cables, General Information
All cabling must comply with national and local
regulations on cable cross-sections and ambient
temperature. UL applications require 75 °C copper
conductors. For non-UL applications, 75 and 90 °C
copper conductors are thermally acceptable.
The power cable connections are located as shown in
Illustration 4.1. Dimension cable cross-section in accordance
with the current ratings and local legislation. See
chapter 8.3.1 Cable lengths and cross-sections for details.
For protection of the frequency converter, use the
recommended fuses if there are no built-in fuses. Fuse
recommendations are provided in chapter 8.4 Fuses. Ensure
that proper fusing is made according to local regulation.
The mains connection is fitted to the mains switch, if
included.
Illustration 4.1 Power Cable Connections
NOTICE
To comply with EMC emission specifications, screened/
armoured cables are recommended. If an unscreened/
unarmoured cable is used, see chapter 4.7.3 Power and
Control Wiring for Unscreened Cables.
See chapter 8 Specifications for correct dimensioning of
motor cable cross-section and length.
Danfoss A/S © 04/2015 All rights reserved.
3 Phase
91 (L1)
power
92 (L2)
input
93 (L3)
95 PE

MG16I302