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-
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5.7.1.2 Models MCD6-0654B~MCD6-1250B & MCD6-0590C~MCD6-1134C
For models MCD6-0144B to MCD6-0579B, a compression connector is recommended. The recommended crimping tool is
TBM8-750.
N O T I C E
A terminal lug is recommended for models MCD6-0654B~MCD6-1250B and MCD6-0590C~MCD6-1134C. The recommended lug
is TCAL125. To use a lug, these models require busbar link 175G0203.
MCD6-0654B~MCD1250B have 6 busbars (x3 for AC in, x3 for motor out) and require 2 x 157G0203.
MCD6-0590C~MCD6-1134C have 9 busbars (x3 for AC in, x3 for bypass, x3 for motor out) and require 3 x 157G0203.
Table 25: Recommended Lugs
Model
Example connector - aluminum cable
Example connector - copper cable
MCD6-0352B
61165
60156
MCD6-0410B
60156
MCD6-0527B
61178
60171
MCD6-0579B
5.8 External Bypass Contactor
Models MCD6-0590C~MCD6-1134C have dedicated bypass terminals, which allow the protection and monitoring functions of the
soft starter to work even when the soft starter is externally bypassed.
Use the bypass contactor output (03, 04) to control the external bypass.
W A R N I N G
SHOCK HAZARD
When the soft starter is wired in inside delta configuration, it results in a portion of the motor windings being connected to line
power at all times (even when the soft starter is switched off). This situation may cause death or serious personal injury.
Always install a main contactor or shunt trip circuit breaker when connecting the soft starter in inside delta configuration.
N O T I C E
Models MCD6-0160C~MCD6-0448C are not suitable for installation with an external bypass contactor.
N O T I C E
If a non-bypassed soft starter is installed with an external bypass contactor, the soft starter's current rating changes. Enable
pa-
rameter 20-7 External Bypass
to increase the maximum current rating and adjust the soft starter's thermal model.
5.9 Motor Connection
The VLT® Soft Starter MCD 600 can be connected to the motor in-line or inside delta (also called 3-wire and 6-wire connection).
When connecting in inside delta, enter the FLC for
parameter 1-2 Motor Full Load Current
. The MCD 600 automatically detects wheth-
er the motor is connected in-line or inside delta and calculates the correct inside delta current level.
N O T I C E
If the soft starter is not detecting the motor connection correctly, use
parameter 20-6 Motor Connection
.
AQ262141844215en-000401 / 175R1174 | 39
Danfoss A/S © 2020.12
Installation
VLT® Soft Starter MCD 600
Operating Guide