This manual introduces the features, characteristics, installation, connection, operation and maintenance of MVC4 medium-voltage solid-state soft starter.
This manual provides detailed instructions for installing, configuring, and operating the MVC4 Solid State Soft Starter for AC medium voltage motors. It includes sections on electrical connections, startup procedures, menu navigation, setpoint programming, metering, and troubleshooting. The device features programmable acceleration and deceleration, overload protection, phase imbalance detection, and communication via Modbus RTU. Maintenance and failure analysis are also covered.
The MVC4 is designed for 10–13.8 kV systems and includes 36 SCRs, fiber optic connections, and a user interface with an LCD, keypad, and LEDs. It supports multiple relay outputs and RTD temperature monitoring. Programming allows customization of ramp types, trip levels, and event logging for motor control and protection.
| AC Supply Voltage | 10000 – 13800 VAC +10 to – 15% (Model dependent) |
|---|---|
| Unit Running Overload Capacity | 125% - Continuous 500% - 60 seconds, 600% - 30 seconds |
| Frequency | 50 or 60Hz, +2Hz hardware selectable |
| SCR Peak Inverse Voltage Ratings | 27000V - 39000V (Model dependent see Table 1) |
| Ambient Temperature | 0° to 40°C (32° to 104°F) |
| Control Voltage | 120VAC (Customer supplied) |
| Relays | 8 Relays (4 programmable): Form C contacts |
| BIL Rating | 110kV |
| Communication Protocol | Modbus RTU |
| Operator Interface | LCD Readout, Keypad, 12 LEDs |
The MVC4 operates on 10,000 to 13,800 VAC, with a tolerance of +10% to -15% depending on the model.
The MVC4 uses 36 SCRs.
The MVC4 supports Modbus RTU over RS-485, RS-422, or RS-232.