This document is the manual of MVC4 soft starter. It introduces the features, specifications, design features, working principle, protection functions, control connections, start-up operations and other aspects of MVC4 soft starter.
This manual provides detailed instructions for operating and programming the MVC 4 soft starter, a solid-state device for starting, protecting, and controlling AC medium voltage motors. It includes sections on wiring, setpoint configuration, metering, and troubleshooting. The unit features programmable acceleration and deceleration, overload protection, and communication via Modbus RTU. Maintenance procedures and failure analysis are also covered.
| 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 Condition Design | 0° to 40°C (32° to 104°F) (optional - 20° to 50° C with heaters) |
| Control Voltage | 120VAC (Customer supplied) |
| Auxiliary Contacts | Multiple: Form C (Contacts), rated 5 Amps, 240VAC max. |
| BIL Rating | 110kV |
| Overload Reset | Manual Retentive Thermal Memory |
| Phase Current Imbalance Protection | Imbalance Trip Level: 5 - 30% current between any two phases |
| Over Current Protection | Trip Level: 100 - 300% of motor FLA |
| Load Loss Trip Protection | Under Current Trip Level: 10 -90 % of motor FLA |
| Coast Down Lockout Timer | Coast Down Time Range: 1 - 60 minutes |
| Starts-per-hour Lockout Timer | Range: 1 - 6 successful starts per hour |
10000 – 13800 VAC with a tolerance of +10 to – 15% (model dependent).
125% continuous, 500% for 60 seconds, 600% for 30 seconds.
Modbus RTU over RS-485, RS-422, or RS232.
110kV.