Terminal Block (Controller); Power Circuits - AuCom MVS User Manual

A B
C
CAUTION
Do not apply voltage to the control input terminals. These are active 24 VDC inputs and must be
controlled with potential free contacts.
Cables to the control inputs must be segregated from mains voltage and motor cabling.
The reset input can be normally open or normally closed. Use parameter 6M to select the configuration.
NOTE
Reset input is normally closed by default.
4.7

Terminal Block (Controller)

Terminations on the Controller use plug-in terminals. Unplug the terminal blocks, complete the wiring, then re-plug the
terminal blocks into the controller.
4.8

Power Circuits

Overview
MVS soft starters are designed to operate as part of a system including other components. A main contactor and bypass
contactor are required in all installations. MVS models V02 ~ V07 must be installed with fuses.
The following additional components may also be required:

main isolator/ earth switch

power factor correction

line inductors

transient/ overvoltage protection

MV/LV control supply transformer
Main Contactor
The MVS must always be installed with a main contactor. Select a contactor with an AC3 rating greater than or equal to
the full load current rating of the connected motor or there is an option for a circuit breaker above 7.2 kV.
The main contactor is associated with terminals L1, L2, L3 on the supply side of the soft starter. The coil is associated with
output terminals 13, 14 of the MVS (refer to
To ensure that the potentially dangerous medium voltage area is isolated from the low voltage control area, power is
supplied to the main contactor coil from the control voltage terminal block (refer to
Bypass Contactor
The MVS must always be installed with a bypass contactor. Select a contactor with an AC1 rating greater than or equal
to the full load current rating of the connected motor or there is an option for a circuit breaker above 7.2 kV.
710-13019-00A
1 2
C23
A
C24
C31 B
C32
C41
C
C42
Control
Relay Outputs Supply
24 VAC/DC
Power Circuit Configuration
MVS User Manual
3
C23 C23
A
C24 C24
C31 C31
B
C32 C32
C41 C41
C
C42 C42
Analog
Control Inputs Output
).
INSTALLATION
1 Two-wire control
2 Three-wire control
3 Four-wire control
A Start
B Stop
C Reset
Fibre Optic Connection
To Power Assembly
Internal Wiring
).
Page 15