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Control switches and Potentiometers

How to control EC fan speed? How to control a damper position? EC fans, frequency inverters, fan speed controllers, damper actuators and many other devices require an analogue control signal, e.g. 0-10 VDC, 0-20 mA or 0-100% PWM to regulate the fan speed or damper position between a minimum and a maximum value. Sentera offers a wide range of control switches and potentiometers to manually generate a stepped or continuous variable control signal.
3-step control switch for single phase motors
3-step control switch for single phase motors
These 3-step control switches are designed to manually adjust the speed of single phase 3-speed fans. They are available with or without OFF position. The working principle of these 3-step control switches is to connect the 230 VAC mains to either the start winding of the motor or to one of the connection points on the main winding of the motor. So the 230 VAC is connected to only one of the three contacts. This allows you to adjust the fan speed from minium to maximum in 3 steps.
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3-step control switch for EC motors or damper actuators
3-step control switch for EC motors or damper actuators
These 3-step control switches are designed to manually adjust the speed of EC fans, frequency inverters or fan speed controllers or the postion of actuator powered dampers in three steps. They are available with or without OFF position. The working principle of these control switches is to divide the analogue 0-10 VDC control signal in three steps. This allows you to adjust the fan speed or the damper position from low to high in 3 steps.
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Potentiometer for EC fans or damper actuators
Potentiometer for EC fans or damper actuators
How to manually generate an infinitely variable control signal for EC fans, frequency inverters, fan speed controllers or damper actuators? Sentera has a wide range of potentiometers to generate the analogue or modulating control signal that is required to obtain an infinitely variable manual control for these devices.
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