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INSTALLATION
FFuse type code formats:
System Voltage
2.3 kV
System Voltage
3.3 ~ 4.2 kV
System Voltage
6 ~ 7.2 kV
Ferraz
A240Rrr
A480Rrr-1
A072xxDxRO-rr
Bussmann
JCK-x-rr
JCL-x-rr
JCR-x-rr
Siba
–
400RC315*
400RC315*
* two fuses in parallel
rr = R rating of the fuse
x = physical format of the fuse (select according to installation requirements)
Examples:
12R fuse for 3.3 kV: A480R12R-1 or JCL-B-12R
24R fuse for 6.6 kV: A072B1DARO-24R or JCR-B-24R
NOTE
Protection fuses are only required when the switching device used is a contactor.
Power Factor Correction
NOTE
Do not connect power factor correction capacitors to the output of MVS soft starters. If static power
factor correction is employed, it must be connected to the supply side of the soft starter.
Power factor correction capacitors should be selected based on the motor data and the required final power factor.
If power factor correction capacitors are being used, select a contactor according to the required kVAr. The
contactor must be connected on the supply side of the soft starter. The power factor correction capacitor
contactor coil is associated with output terminals 33, 34 of the soft starter's Interface PCB.
Line Inductors
Output line inductors may be required if the cable run between the soft starter and the motor is greater than 200
metres. Line inductors are typically installed in a shielded caged enclosure at the soft starter end of the motor cable.
Factors which determine the requirement of line inductors are; the soft starter model, system operating voltage,
output cable length and cable type.
Contact your local supplier for advice when using motor output cables exceeding 200 metres. Cable data will be
required, including the capacitance per km of the cable to be used.
Transient/ Overvoltage Protection
Overvoltage protection should be installed if there is a risk of high voltage transients at the installation. Contact your
local supplier for details.
Control Supply Transformer (PT/VT)
The MVS requires a low voltage control supply. If low voltage is not available, a transformer is required. Use a
transformer with primary voltage matching the MV mains voltage, and secondary voltage to suit the MVS starter.
Use a single phase 550 VA transformer with protection fuses on both the primary and secondary sides.
710-13937-00C
MVS Panel User Manual
35