MVC4 Series
ANSI Rated Medium Voltage Soft Starter
The MVC4 Medium Voltage Series Soft Starter is designed to start AC motors in any fixed speed application. It provides maximum protection with True Thermal Modeling, while allowing smooth, stepless control of acceleration and deceleration — guaranteed power control and protection for your most important assets.
| AC Supply Voltage | 2,300 / 3,300 / 4,160 / 6,000 / 7,200V / 11kV |
| HP Ratings | Up to 20,000 HP |
| Rated Current | Up to 800A |
| Overload | 500% for 60s, 600% for 30s |
| Protection | True Thermal Modeling |
| Rating | ANSI Rated |
True Thermal Modeling
Advanced software tracks all power-related issues contributing to thermal overload — with non-volatile memory.
Smooth Stepless Control
Smooth, stepless control of acceleration and deceleration for any fixed-speed application.
Maximum Protection
Comprehensive power control and protection for your most critical MV motor assets.
Worldwide Proven
Thousands of installations in water, oil & gas, mining, marine, and industrial applications globally.
MVC4 Medium Voltage
Technical Specifications
AC Supply Voltage
2300, 3300, 4160, 6000/7200V, 11–15kV
+10% / -15%, 50/60 Hz line voltages
HP Ratings
Up to 10,000 HP @ 7.2kV (800 Amps max)
Up to 20,000 HP @ 15kV (800 Amps max)
SCR Overload Ratings
500% for 60 seconds, 600% for 30 seconds
Power Circuits
Series strings of SCR power modules (1, 2 or 3 matched pairs of SCRs per phase depending on voltage rating)
SCR Peak Inverse Voltage
2,300V → 6,500V PIV
3,300 – 4,160V → 13,000V PIV
6,000 – 7,200V → 19,500V PIV
11,000 – 15,000V → 39,000V PIV
BIL Rating
2,300 – 7,200V: 60kV
11,000 – 15,000V: 110kV
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 (32 – 122°F), optional -20 – 50°C with heaters
5 – 95% relative humidity
0 – 3,300 ft (1,000m) without derating
Digital Control Unit (DCU)
Programmable keypad / operator with 2 × 20 character backlit LCD display.
Status / Alarm LEDs (Power, Run, Alarm, Trip, Aux 1–8)
Auxiliary Contacts
Multiple Form-C contacts rated 5A @ 250VAC max.
6 fully programmable relays + 5 dedicated relays (fault, at-speed, etc.)
Programmable Features
Motor FLA, service factor, insulation class
Dual Ramp Adjustments — Two independent settings
Initial Torque 0 – 100%
Current Limit 200 – 600% of motor FLA
Acceleration Time 1 – 120 seconds
Three Custom Curves via plotted torque/time axis points
Pump-Flex Decel 1 – 60 seconds
Kick Start 0.1 – 2.0 seconds (10 – 100% voltage)
Tach Feedback option (closed loop speed ramp)
Motor & Starter Protection
Electronic Overload, Phase Loss, Phase Imbalance, Phase Reversal, Short Circuit, 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)
Statistical Data
Elapsed run time, last start time, average starting current, history of up to 60 events (date/time, phase & ground fault current).
Displays time-to-trip, remaining inhibit time and starts/hour.
Metering
Percent of FLA, phase currents, kVAR, kVA, kW, power factor, demand, average start current, remaining thermal register, line frequency, phase order, RTD values (optional)
Enclosure
NEMA 12 (3R optional, not for direct sun applications)
Top & bottom entrance plates
11-gauge steel, ASA #61 gray powder coated paint
Communications
RS485 with Modbus RTU protocol or RS232 with Windows interface
Options: Ethernet/IP, Modbus TCP, DeviceNet, Profibus DP, PROFINET
MVC4 Series
Documentation
Product Brochures
User Manuals (2.3 ~ 7.2kV) - English
- MVC Firmware 7.462.19 MB
- MVC Firmware 7.362.14 MB
- MVC Firmware 7.343.05 MB
- MVC Firmware 7.302.3 MB
- MVC Firmware 7.262.3 MB
- MVC Firmware 7.201.8 MB
- MVC Firmware 6.863.82 MB
User Manuals (10 ~ 13.8kV) - English
- MVC Firmware 7.462.19 MB
- MVC Firmware 7.362.12 MB
- MVC Firmware 7.343.05 MB
- MVC Firmware 7.302.3 MB
- MVC Firmware 7.262.3 MB
- MVC Firmware 7.201.8 MB
User Manuals (2.3 ~ 7.2kV) - Spanish
User Manuals (10 ~ 13.8kV) - Spanish
Wiring Diagrams
Certifications
MVC4 Series
Software Tools
System Requirements
Windows 10 or higher
Intel Core i3 or equivalent
2 GB RAM minimum
100 MB disk space