Danfoss VLT Midi Drive FC 280 Instruction Manual

4 Electrical Installation
4.1 Safety Instructions
See chapter 2 Safety for general safety instructions.
WARNING
INDUCED VOLTAGE
Induced voltage from output motor cables of dierent
adjustable frequency drives that run together can charge
equipment capacitors, even when the equipment is
turned o and locked out. Failure to run output motor
cables separately or use shielded cables or metal
conduits could result in death or serious injury.
•
Run output motor cables separately.
•
Use shielded cables or metal conduits.
•
Lock out all the adjustable frequency drives
simultaneously.
WARNING
SHOCK HAZARD
The adjustable frequency drive can cause a DC current in
the PE conductor and hence result in death or serious
injury.
•
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 that the
RCD cannot provide the intended protection.
NOTICE!
The adjustable frequency drive is supplied with Class 20
motor overload protection.
Overcurrent protection
•
Extra protective equipment, such as short circuit
protection or motor thermal protection between
adjustable frequency drive and motor, is required
for applications with multiple motors.
•
Input fusing is required to provide short circuit
and overcurrent protection. If fuses are not
factory-supplied, the installer must provide them.
See maximum fuse ratings in chapter 9.8 Fuses
and Circuit Breakers.
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 (167 °F)-rated copper wire.
See chapter 9.5 Cable Specications for recommended wire
sizes and types.
4.2 EMC-compliant Installation
To obtain an EMC-compliant installation, follow the
instructions provided in chapter 4.3 Grounding,
chapter 4.4 Wiring Schematic, chapter 4.6 Motor Connection,
and chapter 4.8 Control Wiring.
4.3 Grounding
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 the correct grounding of the equipment
by a certied electrical installer.
For electrical safety
•
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 (see Figure 4.1).
•
Keep the ground wire connections as short as
possible.
•
Follow the motor manufacturer wiring
requirements.
•
Minimum cable cross-section: 10 mm
2
(7 AWG)
(or 2 rated ground wires terminated separately).
Electrical Installation
VLT
®
Midi Drive FC 280
10 Danfoss A/S © 11/2015 All rights reserved. MG07A122
44

Danfoss VLT Midi Drive FC 280 Specifications

General

Brand	Danfoss
Model	VLT Midi Drive FC 280
Category	DC Drives
Language	English