The TSRDF module is an innovative solution to enable the control of solid state relays or thyristor modules as well as a bypass contactor for three-phase transformers. This versatile unit not only allows the switching of transformers with considerable currents of up to 500A, but also the clocking of transformers with pulse groups, making the need for a separate and costly thyristor controller obsolete. It functions as a control module that acts as an actuator in conjunction with external solid state relays or thyristors to realize an effective transformer switching relay for three-phase transformers.

A notable feature of the TSRDF module is its ability to switch three-phase transformers with rated currents above 50A while avoiding inrush currents through an intelligent soft switch-on method. This method ensures that the transformer or even three single-phase transformers can be operated at no-load or under load without an unwanted current surge occurring, which in turn reduces the load on the electrical system and increases the service life of the transformers

This sophisticated control technology not only limits the inrush current, but also completely eliminates it, resulting in a significant improvement in the efficiency and longevity of the transformers. The TSRDF module thus offers a reliable and cost-effective solution for controlling three-phase transformers in various applications, not only optimizing performance but also reducing the load on the electrical system.