USRG EC are modules for controlling EC fans on the basis of temperature, provided for ventilation of the transformer station.
The USRG EC-2 T module controls the three speeds of the first fan in the ventilation mode and activates the third speed when the temperature is exceeded. In addition, switching off the third gear is delayed by the time T set by the user. The second fan only starts at max. together with the third fan speed of the first. The system controls the EC fans through an analog 0-10V voltage signal.
The USRG EC-2 T P module controls one EC fan with an analog 0-10V voltage signal and a damper controlled with a 0-10V signal and receives a feedback signal from a 2-10V damper (e.g. Belimo LM24A-SR). On the basis of the set temperature, the system controls the fan and sets the degree of opening of the throttle accordingly. All settings are made on the controller panel equipped with keys and a display.