Finger Guard Kit; Soft Starter Management Software; Main Contactor; Circuit Breaker - Danfoss VLT MCD 600 Operating Manual

VLT® Soft Starter MCD 600
Operating Guide

3.8.3 Finger Guard Kit

Finger guards may be specified for personal safety. Finger guards fit over the soft starter terminals to prevent accidental contact
with live terminals. Finger guards provide IP20 protection when used with cable of diameter 22 mm or greater.
Finger guards are compatible with models:
• Frame size S2
- Ordering number: 175G0186
• Frame size S3
- 175G0202

3.8.4 Soft Starter Management Software

The VLT® Soft Starter MCD 600 has an installed USB flash interface. The USB flash must be formatted to FAT32 format. To format the
flash, follow the instructions on a PC when connecting a standard flash stick (minimum 4 MB) to a USB port. VLT® Motion Control
Tool MCT 10 transfers the set-up files to the USB flash stick. To load the set-up files to the soft starter, use the LCP as described in
6.7.1 Save and Load Procedure.
The VLT® Motion Control Tool MCT 10 can help manage the soft starter. Contact the local supplier for more information.
Documentation for the VLT® Motion Control Tool MCT 10 can be downloaded from
Support/Downloads.

3.9 Main Contactor

A main contactor is recommended to protect the soft starter from voltage disturbances on the network while stopped. Select a
contactor with an AC3 rating greater than or equal to the FLC rating of the connected motor.
Use the main contactor output (13, 14) to control the contactor.
For wiring of the main contactor, see
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.

3.10 Circuit Breaker

A shunt trip circuit breaker may be used instead of a main contactor to isolate the motor circuit if a soft starter trips. The shunt trip
mechanism must be powered from the supply side of the circuit breaker or from a separate control supply.

3.11 External Bypass Contactor

Models MCD6-0590C~MCD6-1134C can be installed with an external bypass contactor. Bypassing the soft starter increases the soft
starter's maximum current rating and allows the motor to be started direct on-line (across the line) if the soft starter is damaged.
• To bypass the soft starter during run, use an external bypass contactor with an AC1 rating.
• To bypass the soft starter completely (to allow direct on-line starting if the starter is damaged), use an external bypass contactor
with an AC3 rating.
Models MCD6-0160C~MCD6-0448C are not suitable for installation with an external bypass contactor.

3.12 Power Factor Correction

If power factor correction is used, use a dedicated contactor to switch in the capacitors.
To use the VLT® Soft Starter MCD 600 to control power factor correction, connect the PFC contactor to a programmable relay set to
Run. When the motor reaches full speed, the relay closes and power factor correction is switched in.
22 | Danfoss A/S © 2020.12
Illustration 17 in 5.10.1 Internally Bypassed
W A R N I N G
N O T I C E
www.danfoss.com under the sections Service &
Installation.
AQ262141844215en-000401 / 175R1174
System Design