Basler Electric MVC 112 – Manual Voltage Controller for Generators

The Basler Electric MVC 112 is a dedicated manual voltage control unit that allows operators to remotely adjust the output voltage of a generator equipped with a compatible Basler voltage regulator. It provides a simple, reliable interface for fine‑tuning the setpoint without accessing the regulator itself, making it ideal for control room mounting.

Design and Operation

The MVC 112 consists of a high‑quality potentiometer with a calibrated dial, an analog voltmeter indicating the generator terminal voltage, and a selector switch for local/remote operation. The unit is powered directly from the regulator’s auxiliary supply and outputs a variable resistance or voltage signal proportional to the desired setpoint. The circuitry is passive and failsafe, ensuring that loss of connection defaults to a safe condition.

• Power supply: 120 V AC or 24 V DC (derived from regulator)

• Output signal: 0–10 V DC or 0–500 Ω resistance (model dependent)

• Adjustment range: 90–110% of nominal voltage (typically)

• Meter: analogue, accuracy ±2%

• Enclosure: flush‑mount plastic, IP54 front protection

• Dimensions: 72 x 72 mm square (DIN standard)

• Operating temperature: –10 °C to +55 °C

Typical Use Cases

This controller is commonly installed on the front panel of generator switchgear or in a remote operator desk. It works seamlessly with Basler SSR, DECS, and BE1 series regulators that accept a remote setpoint input. The MVC 112 is also used in paralleling applications where the operator needs to manually adjust voltage to match bus conditions.

Installation and Wiring

Mounting is via a standard square cutout with four screws. Wiring is simple: three terminals for the potentiometer signal and two for the meter. The unit comes with a pre‑wired cable or screw terminals. No calibration is required, as the range is preset to match the regulator’s input requirements.

Reliability and Maintenance

Built with robust, long‑life components, the MVC 112 requires minimal maintenance. The potentiometer uses a conductive plastic element for smooth operation and wear resistance. Basler guarantees compatibility with its regulators, and the unit is backed by the company’s technical support.

In conclusion, the Basler Electric MVC 112 manual voltage control offers a straightforward, effective means of remote generator voltage adjustment, enhancing operational flexibility while maintaining reliability.