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Solid State Transfer Switch (SSTS)

The solid state transfer switch (SSTS) is an electrical device that allows instantaneous transfer of power sources to the load. Its superior switching time allows the device to switch to the back-up power source so quickly that the load never recognizes the transfer made if one power source fails. The device can be considered as a power electronic replacement for the distribution switchgear. Usually, commercial SSTS provide a small measure of fault current limiting behaviour and hence reduce the stress on the downstream circuit breakers [2]


SSTS provides seamless uninterruptable power to customers and also rapid load transfer between independent feeder systems. The ability to transfer seamlessly between feeders where direct interconnection is not allowed, enables the device to perform load shedding easily.

Key Technology Area: 
Advanced Components

Sample Vendors:


(Disclaimer: This is a representative sample list of vendors which is updated frequently. The SGIC portal does not endorse any companies or products listed herein.)