Specifically designed for ease of integration into automated systems, the MVC Plus Series offers communications and flexible I/O as standard.
- 120Vac control power input accepts long control circuit runs without the need for interposing relays.
- 8 programmable relay outputs for control flexibility without the need for external auxiliary relays or add-on cards.
- 2 programmable analog outputs (0 – 10Vdc or 4 – 20mA).
Built-in comm ports
- RS-232 for one on one communications with a PC.
- RS-485 for multi-drop communications with Modbus RTU protocol as standard.
For on-line monitoring, control and programming, the MVC3 Control Center software uses the standard RS-485 port to communicate via Modbus RTU protocol. Multidrop compatible for communicating with multiple units in the field, global data such as operating currents, voltages, power factor, etc. can be displayed for each unit. Individual parameters for any selected unit are displayed in the lower right section of the screen, and are fully interactive in real time. Anything that can be done at the unit can be done via software. Communications options include DeviceNet, Fieldbus, Ethernet and several others.
One to One
Program and store soft starter setpoints with Windows based software, MVC3-Win. The software uses the RS-232 port to duplicate the operator interface on the screen and steps through the setup or storage of operating parameters.
of the Motortronics MVC Plus Series
Type of Load
3-phase medium voltage AC induction or synchronous motors
AC Supply Voltage
2300, 3300, 4160, 6000/7200V, 11-15kV
V AC + 10% to -15%, 50/60 Hz line voltages
Up to 7500HP @ 7.2kV (600 Amps max)
Up to 15000HP @ 15kV (600 Amps max)
Contact factory for higher rating requirements
500% – 60 seconds, 600% – 30 seconds
Series strings of SCR power modules (1,2 or 3 matched pairs of SCRs per phase depending on voltage rating)
|SCR Peak Inverse Voltage|
|Line Voltage||PIV Rating|
|3300 – 4160||13000|
|6000 – 7200||19500|
|11000 – 15000||39000|
2300V – 7200V 60kV
11 000 – 15000V (11 OkV)
Transient Voltage Protection
dv/dt circuits (1 per SCR pair)
Vacuum Bypass Contactor
Standard on all models, line start rated
Ambient Operating Conditions
0 – 50°C (82° F to 122° F) (Optional-20° to 50° C with heaters)
5 – 95% relative humidity
0 – 3300 ft (1000m above sea level without derating)
Digital Control Unit (DCU)
Programmable keypad/operator with 2 lines x 20 character backlit LCD display, Status/Alarm LEDs (indicate: Power, Run, Alarm, Trip, Aux 1 – 8)
Multiple Form C contacts rated 5A @ 250VAC max,
6 fully programmable relays (including fail-safe operation)
5 dedicated relays (fault, at-speed, etc. )
Motor FLA, service factor, insulation class
Dual Ramp Adjustments – Two independent settings for:
|Initial Torque||0 – 100% of nominal torque, voltage or current|
|Current Limit||200 – 600% of motor FLA|
|Acceleration Time||1 – 120 seconds|
|Three Custom Curves||Via plotted torque/time axis points|
|Pump-FlexTm Decel||1 – 60 seconds with begin & end torque adj|
|Kick Start||0.1 – 2.0 seconds (10 – 100% voltage)|
|Tach Feedback (option)||Closed loop speed ramp|
|Motor and Starter Protection|
|Electronic Overload||Phase Loss|
|Phase Imbalance||Phase Reversal|
|Short Circuit Detection||Over / Under Current|
|Over / Under Voltage||Shorted SCR / Shunt Trip|
|Starter Over-Temp||Coast Down Lockout|
|Starts per Hour Lockout||Time between starts|
|RTD Input (Option)||Ground Fault (Option)|
Elapsed run time, last start time, average starting current, stores history of up to 60 events (data includes date & time, phase& ground fault current). Also displays time-to-trip, remaining inhibit time and starts/hour values.
Metering (Voltage & Current)
Percent of FLA, phase currents, kV AR, kV A, kW, power factor, demand, avg. start current, remaining thermal register, thermal capacity to start, measured capacity to start, time since last start, line frequency, phase order, RTD values (optional)
NEMA 12 with 3R optional (not for direct sun applications), top and bottom entrance plates, 11 gauge steel, ASA #61 gray powder coated paint
RS485 with Modbus RTU protocol or RS232 with windows interface
Standard MVC3 Class E2 Soft Starter
Optional Soft Start Only
11 – 15kV