Terminal Types; Motor Connection; Illustration 2.14 Opening The Terminals - Danfoss VLT FCD 302 Operating Instructions Manual

Installation
For both small and large unit, the service switch is
optional. The switch is shown mounted on the motor side.
Alternatively, the switch can be located on the mains side,
2 2
or omitted.
For the large unit, the circuit breaker is optional. The large
unit can be configured with either service switch or circuit
breaker, not both. The illustration shown is not config-
urable in practice, but is displayed to show the respective
positions of components only.

2.4.3 Terminal Types

Motor, control, and mains terminals are spring loaded
(CAGE-CLAMP) type.
1. Open the contact by inserting a small screwdriver
into the slot above the contact, as shown in
Illustration 2.14.
2. Insert the stripped wire into the contact.
3. Remove the screwdriver to fasten the wire into
the contact.
4. Ensure that the contact is firmly established and
not loose. Loose wiring can result in equipment
faults or injury.

Illustration 2.14 Opening the Terminals

2.4.4 Motor Connection

WARNING
INDUCED VOLTAGE
Run output 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. Failure to
run output motor cables separately could result in death
or serious injury.
18
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®
VLT Decentral Drive FCD 302 Operating Instructions
CAUTION
WIRING ISOLATION
Run input power, motor wiring, and control wiring in three
separate metallic conduits. Alternatively, use separated
shielded motor and control cables for high frequency noise
isolation. Failure to isolate power, motor and control wiring
can result in sub-optimal performance of the frequency
converter and associated equipment.
MOTOR PROTECTION
Protection against motor overload is not included in the
factory setting. If this function is desired, set 1-90 Motor
Thermal Protection to trip or warning. Refer to the FCD 302
Programming Guide, MG04GXYY for further information.
•
•
•
•
No.
96 97 98 Motor voltage 0-100% of mains voltage
U V
U1 V1 W1
W2 U2 V2
U1 V1 W1 6 wires out of motor, Star connected
PE
NOTE
Do not install power factor correction capacitors between
the frequency converter and the motor.
Do not wire a starting or pole-changing device between
the frequency converter and the motor.
Parallel connection of motors
The frequency converter can control several parallel-
connected motors. The total current consumption of the
motors must not exceed the rated output current I
the frequency converter.
®
MG04F302 - VLT is a registered Danfoss trademark
Connect the motor to terminals 96, 97, 98.
Connect earth to PE-terminal.
Make sure that the screen of the motor cable is
properly earthed at both ends (motor and
frequency converter).
For correct dimensioning of cable cross-section,
see 8.1.1 Electrical Data and Wire Sizes.
W 3 wires out of motor
6 wires out of motor
Connect U2, V2, W2 separately (optional terminal
block)
Earth connection
for
M,N