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The fan assisted natural draft cooling tower (FAND) combines the advantages of the natural draft cooling tower and the mechanical draft cooling tower.It becomes the best available technology when :Locations with limited plot plan. Overall height is limited. Important heat load . ADVANTAGES VS. CELLS: Compact arrangement. Power saving due to natural draft. No recirculation. Always a good alignment considering wind directions. Cooling by natural draft in case of electricity shortage.ADVANTAGES VS. NATURAL DRAFT CT: Reduced height. Better cooling characteristics during the summer season. Higher flexibility

Plume-abated fan assisted natural draft or circular hybrid cooling tower is the best technical solution for large heat loads and stringent plume abatement requirements.Seawater application. If overall height is limited. To keep countryside free from visible plume formations and shadow .For locations close to residential areas .To facilitate permission processes. ADVANTAGES VS CELL TYPE HYBRID COOLING TOWER: Compact arrangement/space saving. No recirculation and interference effects. No wash down (grounding) effects of plume. Use of natural draft. No corrosion due to humidity and salinity in the neighborhood. Visually an interesting architectural structure.

This 3-step control switch regulates EC fans, damper actuators, AC fan speed controllers or frequency inverters. It needs 10 VDC supply voltage. The device has an OFF position to stop the motor completely. Thus, the output signal is divided into 4 steps: 0 VDC and 3 other output voltages. The output for position 3 always equals the supplied voltage i.e. 10 VDC. The output ranges for positions 1 and 2 can be adjusted via internal trimmers. There is also a version with 2 predetermined voltage steps: SMT-D-4P-EM

This fan speed controller is used to control EC fan speed. The unregulated output can control a water valve or an electric heating element. Via the rotary knob the temperature can be set between 5 - 35°C. Fan speed is regulated manually in 5 steps, there's an Off-position and automatic mode. In automatic mode a temperature sensor PT500 is required. Choice between cooling/heating mode can be done via Modbus communication or a jumper. This controller can be connected to our SenteraWeb or a BMS-system. .

This controller regulates the fan speed of single-phase motors from 1,5 to 10 A via phase angle control a.k.a. Triac technology. The supply voltage of 230 VAC can be turned off via the illuminated ON/OFF switch on the side of the unit. Via de potentiometer located on the front of the controller you can set the desired fan speed. Minimum speed can be adjusted via an internal trimmer and kickstart/softstart by adding/removing a jumper on the PCB of the controller. This controller is typically used to regulate the speed of AC fans or centrifugal pumps in HVAC systems. The regulator is also available with TK monitoring. This function will deactivate the motor in case of overheating. The code for this type of regulator suitable for 1,5 A is ITRS-15-DT.

The STR-1-15L22 is a transformer fan speed controller with which you can manually regulate the fan speed of single-phase motors in 5 steps. The unit also has an off-position. It needs a 230 VAC/50-60 Hz supply voltage and has an unregulated output of 230 VAC that can control a damper, an external status indicator, etc. This output is active as soon as the motor is enabled. The sinusoidal shape of the generated motor voltage results in an exceptionally quiet motor operation and extended service life. The special impregnated coating reduces the electrical noise from the built-in autotransformer. This series is available in different amperes. The casing of the controllers up to 7,5 A is made from high quality plastic, while the models above 7,5 A have a metal housing. This transformer doesn't need any configuration. Once installed, it's ready for use.