With the advancement of technologies, the progress of electronics has allowed the creation and projection of numerous devices, such as the starter to solid state, which focuses basically on a set of pairs of thyristors, or combinations of thyristors and diodes, with an em each motor power terminal. In this way, it is possible to be able to sustain the starting current at the line near the nominal line and with a subtle variation. In addition to the advantage of voltage or current control during the start, the electronic key also has the convenience of not containing moving parts or producing arcs, as in the case of mechanical switches. RBA2S
The firing angle that each thyristor pair counts is electronically controlled in order to apply a variable voltage to the motor terminals during the acceleration process. At the end of the starting period, normally adjustable on average, between 2 and 30 seconds, the voltage can reach its full value after a subtle acceleration or an ascending ramp, as opposed to being exposed to sudden increases or jumps.