This manual provides a detailed introduction to the specifications, design features, principle, protection functions, circuit, connection, start-up, user interface and menu navigation of MVC4.
The Motortronics MVC4 is an SCR-based controller designed for the starting, protection, and control of AC medium voltage motors. It is intended to create a complete Class E2 medium voltage motor soft starter when interfaced with an enclosure and necessary equipment. The unit features programmable overload curves, phase current imbalance protection, and electronic shear pin overcurrent protection.
| AC Supply Voltage | 10000 – 13800 VAC +10 to – 15% |
|---|---|
| Unit Running Overload Capacity | 125% - Continuous |
| Frequency | 50 or 60Hz, +2Hz hardware selectable |
| Power Circuit | 36 SCRs |
| SCR Peak Inverse Voltage Ratings | 27000V - 39000V |
| BIL Rating | 110kV |
| Auxiliary Contacts | 8 Relays (4 programmable) |
| Protocol | Modbus RTU |
The unit supports an AC supply voltage of 10000 – 13800 VAC with a tolerance of +10 to – 15%.
The unit has a running overload capacity of 125% of the motor Full Load Amperage (FLA) continuously.
Yes, the frequency is selectable between 50 or 60Hz with a +2Hz hardware selection option.
The MVC4 has a Basic Impulse Level (BIL) rating of 110kV.