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MSE/MSD Motor Protecting Switch Units |
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Motor protecting switch units with 1, 2 or 3 switching steps are suitable for speed control of voltage-controlled 1-(MSE) or 3-(MSD) phase fans and offer optimal protection for motors with built-in thermal contacts or PTCs. The devices are available in various ratings and formats. Speed selection is done manually through the built-in step switch or through an external thermostat for automatic switch units. When using 3-speed motor switch units, their combination with the proper motor drive must be considered. Normally, motor protection is provided by thermal contacts. Motor protecting switch units for PTC connection are marked with a K in the type designation.
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Transformer controllers with up to 5 switching steps are suited for speed control of voltage-controlled 1- (RTE) to 3- (RTD) phase fans and offer optimal protection to motors with built-in thermal contacts or PTCs. The devices are available in various ratings and formats. Speed selection is done manually through the built-in step switch or through an external thermostat for automatic control units. Normally, motor protection is provided by thermal contacts (RTD). Control units for PTC connection (RKD) are marked with a K in the type designation. Further options are: room thermostat connection, frost protection, flap positioning motor, solenoid gas valve, external speed selection.
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Electronic Control Units |
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Electronic control units for stepless speed control of voltage-controlled 1- or 3-phase fans. The devices are available in various ratings and formats. Rosenberg offers electronic control units with manual speed selection as well as devices for simple control applications (temperature-pressure control).
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switches: 1-, 2-, 3-step
