INSTALLATION
710-13019-00A
MVS User Manual
Page 15
1
Two-wire control
2
Three-wire control
3
Four-wire control
A
Start
B
Stop
C Reset
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
Power Circuit Configuration
).
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
Internal Wiring
).
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.
1
A
B
A
B
C
A
B
C
C
2
3
C32
C31
C24
C23
C42
C41
03
94
3.
D
C32
C31
C24
C23
C42
C41
C32
C31
C24
C23
C42
C41
Ou
tp
u
t
A
Ou
tp
u
t
B
Ou
tp
u
t
C
Mo
to
r
T
h
er
m
is
tor
24 VAC/DC
Relay Outputs
Control
Supply
Control Inputs
Fibre Optic Connection
To Power Assembly
Analog
Output
St
a
rt
St
o
p
Re
s
e
t
Pr
o
g
A
Pr
o
g
B
0
394
8.
B
