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Danfoss VLT FC 103 Operating Instructions

Danfoss VLT FC 103
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For safety, comply with the following requirements:
Electronic controls equipment is connected to
hazardous mains voltage. Take extreme to protect
against electrical hazards when applying power
to the unit.
Run motor cables from multiple frequency
converters separately. Induced voltage from
output motor cables run together can charge
equipment capacitors, even with the equipment
turned off and locked out.
Field wiring terminals are not intended to receive
a conductor one size larger.
Overload and equipment protection
An electronically activated function within the
frequency converter provides overload protection
for the motor. The overload calculates the level of
increase to activate timing for the trip (controller
output stop) function. The higher the current
draw, the quicker the trip response. The overload
provides Class 20 motor protection. See
chapter 9 Warnings and Alarms for details on the
trip function.
Because the motor wiring carries high frequency
current, it is important that wiring for mains,
motor power, and control are run separately. Use
metallic conduit or separated shielded wire. See
Illustration 3.24. Failure to isolate power, motor,
and control wiring could result in less than
optimum equipment performance.
All frequency converters must be provided with
short-circuit and overcurrent protection. Input
fusing is required to provide this protection, see
Illustration 3.25. If not factory supplied, fuses must
be provided by the installer as part of installation.
See maximum fuse ratings in
chapter 11.3.1 Protection.
Motor
Line Power
Stop
Start
Speed
Control
130BX370.10
Illustration 3.24 Example of Proper Electrical Installation using
Conduit
Installation Operating Instructions
MG16J202 Danfoss A/S © Rev. 05/2014 All rights reserved. 27
3 3

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Danfoss VLT FC 103 Specifications

General IconGeneral
BrandDanfoss
ModelVLT FC 103
CategoryDC Drives
LanguageEnglish

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