This is a 230V GRDC Frequency Controller from Polam-Elta. It is designed to be an economical and reliable solution for controlling the speed and torque of single- and three-phase electric motors with a maximum current of 20A. It is suitable for applications such as fans, pumps, conveyors, elevators, hoists, cranes, and other industrial machinery. The controller has a digital LCD display, adjustable parameters, and a variety of protection and self-diagnostic features. It is a CE certified product and has a built-in thermal overload protection.