Demand based cooling & monitoring

Fan-and-filter units with electronically commutated (EC)
 motors for electrical enclosure cooling are
 recognised for  lower energy consumption and
 extended service life. Furthermore, infinite speed control
 as well as a monitoring signal are much simpler to 
incorporate in an EC motor than the AC equivalent.



Rittal’s new EC Speed Control supports these benefits,
 and adds a number of others. It can be used to reduce noise
 output of EC fan-and-filter units, as well as lower energy
 consumption still further through the ability to control the speed
 of up to four units.  Cooling demand – and hence required
 fan speed – is determined by comparing the sensed temperature
 inside the enclosure with the set-point temperature on the
device, from 5 to 55°C.


The Rittal EC Speed 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.