Electrical Installation; Safety Instructions - Danfoss VLT FC 102 Installation Manual

Electrical Installation

5 Electrical Installation

5.1 Safety Instructions

See chapter 2 Safety for general safety instructions.
WARNING
INDUCED VOLTAGE
When output motor cables from different frequency
converters are run together, induced voltage can charge
equipment capacitors even with the equipment turned
off and locked out.
To avoid death or serious injury:
•
Run output motor cables separately or use
shielded cables.
•
Simultaneously lock out all the frequency
converters.
CAUTION
SHOCK HAZARD
The drive system can cause a DC current in the
protective earth (PE) conductor.
•
When a residual current-operated protective
device (RCD) is used for protection against
electrical shock, only an RCD of Type B is
allowed on the supply side.
Failure to follow this recommendation could prevent the
RCD from providing the intended protection.
MG37K302
Installation Guide
NOTICE
MOTOR OVERLOAD PROTECTION
The drive modules are supplied with Class 20 overload
protection for single motor applications.
Overcurrent protection
•
•
Wire type and ratings
•
•
See chapter 7.6 Cable Specifications for recommended wire
sizes and types.
CAUTION
PROPERTY DAMAGE
Electronic thermal relay (ETR) protection against motor
overload is not included in the default setting. To
program the LCP for this function, refer to the VLT
Parallel Drive Modules User Guide.
Danfoss A/S © 08/2017 All rights reserved.
Extra protective equipment, such as short-circuit
protection or motor thermal protection between
the drive modules and the motors, is required for
applications with multiple motors.
The correct input fusing is required to acquire
approvals and meet certification requirements,
and to provide short circuit and overcurrent
protection. These fuses are not factory-supplied,
and must be provided by the installer. See
maximum fuse ratings in chapter 7.1 Power-
dependent Specifications.
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.
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