Requirements - Danfoss VLT Decentral Drive FCD 302 Operating Manual

Installation
2
1
L1
L1 1
L2
3
L2
L3
L3 5
NO
PE 33
41 NC
1 Looping terminals
2 Circuit breaker
Illustration 2.10 Large Unit only: Circuit Breaker and Mains
Disconnect
1
1
L1
3
L2
L3
7
PE
1 Looping terminals
Illustration 2.11 Large Unit only: Service Switch at Mains with
Looping Terminals

2.4.1 Requirements

WARNING
EQUIPMENT HAZARD
Rotating shafts and electrical equipment can be
hazardous. All electrical work must conform to national
and local electrical codes. Installation, start-up, and
maintenance to be performed only by trained and
qualified personnel. Failure to follow these guidelines
could result in death or serious injury.
For your safety, comply with the following requirements:
•
Electronic controls equipment is connected to
hazardous mains voltage. Take extreme
precautions against electrical hazards when
applying power to the unit.
•
Wear safety glasses whenever working on electric
control or rotating equipment.
MG04F402
Operating Guide
T1 2 L1 U
91 96
Overload and equipment protection
4 L2 V
T2
92 97
T3 6 L3 W
93 98
NO 34
12
NC 42
27
2 L1 U
U
91 96
L2 V
4
V
92 97
L3 W
6
W
93 98
8
12
27
Wire type and ratings
Cable glands
It must be assured that appropriate cable glands needed
for the environment are chosen and carefully mounted.
Danfoss A/S © 05/2016 All rights reserved.
•
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.
•
An electronically activated function within the
frequency converter provides overload protection
for the motor. Set parameter 1-90 Motor Thermal
Protection to warning or trip as required. Refer to
®
the VLT Decentral Drive FCD 302 Programming
Guide MG04GXYY for further information.
Parameter 1-90 Motor Thermal Protection measures
motor current and is internally set based on the
value in parameter 1-24 Motor Current. A 1.2 x FLA
(full load amps) service factor is built in and
maintained. Should the motor current increase
above that value, 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 7 Troubleshooting for details on the trip
function.
•
Because the motor wiring carries high frequency
current, it is important that wiring for mains input
power, motor power, and control are run
separately. Use separated shielded wire or
metallic conduit. Failure to isolate power, motor,
and control wiring could result in less than
optimum equipment performance.
•
When using cable trays, place sensitive cables
such as telephone or data cables in a separate
cable tray to the motor cable. If signal cables run
across power cables, these cables must cross at
an angle of 90°.
•
All wiring must comply with local and national
regulations regarding cross-section and ambient
temperature requirements.
•
The screen must have low RF impedance, which
is achieved by a braided screen of copper,
aluminium or iron.
•
Danfoss recommends that all power connections
are made with a minimum 75 °C (167 °F) rated
copper wire.
•
See chapter 8.1 Electrical Data and Wire Sizes for
recommended wire sizes.
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