An EC speed control, designed for EC fan-and-filter units, has been introduced by Rittal. The control is compatible with larger models in the company’s TopTherm EC fan-and-filter unit range.
Fan-and-filter units with EC motors for electrical enclosure cooling are already recognised for their lower energy consumption and extended service life. Furthermore, speed control and signal monitoring are much simpler to incorporate in an EC motor than an AC motor equivalent.
Rittal’s EC speed control supports these benefits, and adds a number of others. It can be used to reduce the noise output of EC fan-and-filter units, as well as to further lower energy consumption through the ability to control the speed of up to four units. Cooling demand is determined by comparing the sensed temperature inside the enclosure with the set-point temperature on the device, from +5 to +55°C.
The control is also able to closely monitor the status of the fan. The unit provides a local visual display of the operating status and incorporates an alarm relay for the remote monitoring of over-temperature, fan defect, cable break and sensor failure.