Basler Electric MOC2207 Motor Operated Control Potentiometer

The Basler Electric MOC2207 is a motor-operated potentiometer designed for remote or automatic adjustment of control setpoints in generator voltage regulators and excitation systems. It replaces manual potentiometers with a motor-driven unit that can be controlled locally via a panel switch or remotely via a control signal. This device is essential for applications requiring frequent setpoint changes, such as reactive power control, load sharing, or automatic voltage trimming.

Key Features

• Precision potentiometer with linear resistance characteristic

• Reversible motor drive for increase/decrease operation

• Built-in limit switches to prevent over-travel

• Manual override knob for local adjustment

• Compact and robust enclosure suitable for panel mounting

• Wide operating voltage range for motor supply

• Long mechanical life with proven reliability

• Easy integration with existing regulator circuits

Technical Specifications

The MOC2207 has a resistance value of typically 1 kΩ or 2 kΩ, with a power rating of 2 watts. The motor operates on 120 VAC or 24 VDC (depending on configuration). The rotational angle is 270 degrees with adjustable end stops. The unit has a mechanical life of over 1 million cycles. Operating temperature range is -20 to +70 degrees Celsius. The potentiometer linearity is ±1 percent. The housing is made of flame-retardant plastic with terminal connections for easy wiring.

Operation and Control

The MOC2207 receives a raise or lower command from an external control source, such as a pushbutton, relay contact, or automatic controller. The motor rotates the potentiometer shaft, changing the resistance seen by the regulator circuit. Internal limit switches cut off power at the end of travel to prevent damage. A manual knob allows operators to override the motor and set the desired position directly.

Installation and Integration

Mount the unit on a panel using the provided brackets. Connect the motor supply and control leads, as well as the potentiometer terminals to the regulator. Ensure proper polarity for motor direction. The unit can be wired in parallel with a fixed resistor to adjust the total resistance range. Calibration involves setting the end stops to match the required voltage limits.

Applications

Commonly used in automatic voltage regulators (AVRs) to enable remote voltage setpoint adjustment. Also applied in reactive power controllers, load sharing systems, and motor control circuits. The MOC2207 is suitable for power plants, substations, and industrial facilities where remote control of generator excitation is needed.

Reliability and Maintenance

Designed for continuous duty, the MOC2207 requires no routine maintenance other than periodic inspection of connections. The motor and gears are lubricated for life. The potentiometer element is wear-resistant, ensuring long-term stability.

Conclusion

Basler Electric MOC2207 motor operated control potentiometer offers a reliable and versatile solution for remote setpoint control in excitation and regulation systems. Its rugged construction, precise adjustment, and easy integration make it an essential component for modern generator control panels.