RTD Speed Controller

5-Stage control unit
Three-phase, 5-speed controller with mains contactor and monitor light for speed regulation with transformer of
voltage controlled motors / fans. With the step switch, which is built into the controller, five different speeds can be
adjusted on the connected motor / fan. Thus switch step 1 corresponds to the lowest, respectively switch step 5
corresponds to the highest speed.
Room thermostat connection: When connecting room thermostat dependent on the adjusted temperature at the
thermostat the motor is switched off over the controller.
The controller’s control circuit is protected by a fuse of 2A.

Design
RTRD 1.2 /, RTRD 2.5 / RTRD 3 / RTRD 3.8
Enclosure with aluminium die cast base and light grey plastic lid in protection class IP54.
RTRD 5
Plastic coated white sheet steel in enclosure in protection class IP54.
RTRD 7 / RTRD 10
Plastic coated grey sheet steel in enclosure in protection class IP54.

Available in following sizes: