How Static Transfer Switch works ?

Static Transfer Switch(STS) is a static electric device, designed to automatically transfer charge to a standby power source connected to its input when there were an earlier disruption and to reverse without interrupting the server room charge. Static Transfer Switch(STS) It is completely static, as its name suggests, without any electromechanical components. Static Switch is capable of transporting load to the data centre within 1:4th of cycle time. The Static Transfer Shift consists of a combined thyristor anti-parallel in every phase. These thyristors are the thyristor turning off gate (GTO) which can be activated by the gate signal and by the gate signal negative polarity.

Through control Switch schematic is shown above. Both source has thyristor circuit with its own input MCCB and Maintenance bypass switch.

The transmission switch is made up of logic control, measuring circuit, thyristor circuit, disrupter and bus assembly. Controlling logic function, which controls both source and voltage continuously and provides a single gate for correction devices. The logic control constantly checks the voltage and current of the prepared source. If you don't like a preferential source or disruption, the logic checks the status of an alternative source and transfers loads to the source, which can provide power within the selectable boundary. If both sources are synchronised with phase errors within a maximum of 6 milliseconds automatic transfer can occur.