Danfoss VLT FC 103 Operating Instructions Manual page 16

Refrigeration drive
Hide thumbs Also See for VLT FC 103:
Table of Contents

Advertisement

Installation
F F or your safety, comply with the following requirements
Electronic controls equipment is connected to
hazardous mains voltage. Extreme care should be
taken to protect against electrical hazards when
applying power to the unit.
2
2
Run motor cables from multiple frequency
converters 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
8 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 2.3. 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 over-current protection. Input
fusing is required to provide this protection, see
Illustration 2.4. If not factory supplied, fuses must
be provided by the installer as part of installation.
See maximum fuse ratings in 10.3.1 Protection.
12
inverter.ru
(812) 702-47-50
VLT Refrigeration Drive Operating Instructions
Stop
Start
Speed
Illustration 2.3 Example of Proper Electrical Installation Using
Conduit
MG16J102 - VLT is a registered Danfoss trademark
Line Power
Control
Motor

Advertisement

Table of Contents
loading

Table of Contents