Microcontroller based timeswitch, which has inputs like Real time, Date, Month, Year, plus and minus offset. Can be set through available tactile switches and with help of seven-segment display. Memory of the unit has date wise yearly Sunset and Sunrise Timings for the required city, as the date advances output relay gets ON as per the concurrent Sunset and Sunrise Timings. In case if it is required to change this timing, it can be done with help of plus and minus offset.

Micro controller's RTC has got 5 years backup through battery; hence the set program remains intact even in power failure condition. Enough precautions for line supply surge are taken. The Output channel relay operates the electrical contactor that ultimately controls the lamp load.

Due to its versatile concept of switching at Sunset and Sunrise Timings throughout year, it gives saving in electrical units, which ultimately result in, reduced electric bills.

Model : TSW SSSRF 1 Ch
Single Output relay is available with this model, which operates the electrical contactor that ultimately controls the lamp load as per Sunset/Sunrise timings.

Model : TSW SSSRF 2 Ch
Two Output relays are available with this model, first channel operates as per Sunset/Sunrise timings whereas second channel has fixed Off Peak hour program (Factory Settable) in between Sunset and Sunrise timings, during this Off Peak hour period output relay remains OFF.

Model : TSW SSSRF 3 Ch
Three Output relays are available with this model, first channel operates as per Sunset/Sunrise timings whereas second and third channels has settable Off Peak hour program in between Sunset and Sunrise timings, during this Off Peak hour period output relays remains OFF.
This Timeswitch has feature like automatic live phase selection so that even in failure of any phase out of three phases, output contactor remains ON.
Even other features can be added to this Timeswitch as per the need of customer.