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Nov 17, 2020 at 16:01 comment added Kumaran Tried this idea of add a DPDT mains controlled relay, but did not work dropbox.com/s/59dc6kejp499kg7/dpdt.jpg?dl=0
Nov 17, 2020 at 15:50 comment added Kumaran If power fails Home automation loses power, thereby RLY1 contact opens same time RLY 3 opens. My assembled UPS takes approx 45 secs to cut in. 5V DC relay used in place of RLY 2 can hold contacts for few seconds only. Cannot succeed. Any other suggestions please
Nov 17, 2020 at 9:49 comment added Kumaran still working on it, will post the update.
Nov 16, 2020 at 7:20 comment added Transistor It's not clear from your comment whether it worked or not.
Nov 16, 2020 at 2:00 comment added Kumaran I replaced SPDT Relay 2 to a DPDT relay, then Relay 2 is a DC Relay of 5V coil powered by a 5V mains adapter with added capacitor to hold its contact during transient period from mains to UPS. Added new home automation relay to trigger DPDT relay. Thanks. Anymore possibilities also please share.
Nov 15, 2020 at 16:40 comment added Kumaran I will try this idea. I have DC relays used in the system. I will try to modify and fit into the system and post the output shortly. Thanks, it really helps mentally.
Nov 15, 2020 at 15:17 history answered Transistor CC BY-SA 4.0