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Changeover

Generator/UPS/Battery Relay Changeover Circuit

Last Updated on July 6, 2019 by Swagatam 28 Comments

automatic2Bbattery2Bcharger2Bcircuit

In this article I have explained a generator/UPS/Battery relay changeover circuit for implementing a customized optimization for a generator, UPS, battery power network, in order to enhance the operational efficiency of the system. The idea was requested by Mr. Sidingilizwe. Circuit Objectives and Requirements First of all thank you for adding me to your circles. […]

Filed Under: Inverter Circuits Tagged With: Battery, Changeover, Generator, Relay, UPS

Solid-State Inverter/Mains AC Changeover Circuits Using Triacs

Last Updated on May 21, 2026 by Swagatam 24 Comments

inverter2Bmains2Bchangeover

In this post I have explained 2 simple concepts for making solid-state triac based Inverter/mains AC changeover circuit, the idea was requested by Music girl. Technical Specifications I would like to replace the SPDT relay with 2 scr’s. Would you consider a circuit to replace those changeover relays? I believe a relay would need to […]

Filed Under: Grid and 3-Phase Tagged With: AC, Changeover, Inverter, Mains, Solid, State

Petrol to LPG ATS Circuit using Solenoid Changeover Valve

Last Updated on May 21, 2026 by Swagatam 32 Comments

ATSsolenoid 1

In this post I have explained a simple mains to generator automatic transfer switch (ATS) which features an initial petrol start which switches to an LPG gas supply via fuel valve changeover switches. The idea was requested by Mr. Junaid. Technical Specifications sir i want to make my generator automatic start on petrol then shift […]

Filed Under: Grid and 3-Phase Tagged With: ATS, Changeover, LPG, Petrol, Solenoid, Valve

Dual A/C Relay Changeover Circuit

Last Updated on March 8, 2019 by Swagatam 4 Comments

In this post I have explained a simple relay changeover circuit which may be used for switching a couple of A/Cs or any similar load alternately in order to avoid misuse and save power. Technical Specifications Here is the situation: State: California. Facility: Church. The electric rate is greatly influenced by peak usage in any […]

Filed Under: Inverter Circuits Tagged With: Changeover, Dual, Relay

Grid Mains to Generator Changeover Relay Circuit

Last Updated on May 21, 2026 by Swagatam 176 Comments

generator2Bmains2Bchangeover2Bcircuit

In this post I have explained a simple configuration which can be used as a automatic changeover circuit for switching AC grid mains to generator mains, during power failures or outages. The explained circuit will effectively switch the connected appliances to the generator mains during power failure however it won’t be able to switch start the generator automatically, […]

Filed Under: Grid and 3-Phase Tagged With: Changeover, Generator, Grid, Mains, Relay

3 Simple Solar Panel/Mains Changeover Circuits

Last Updated on January 2, 2024 by Swagatam 40 Comments

solarpanelmainsAVCchangeoverrelaycircuit

The discussed automatic change over relay circuit was requested by Mr.Karimulla Baig. The circuit normally charges the connected battery at constant current through the power received from the solar panel, and reverts to DC power from an AC/DC adapter in the absence of solar energy (during night time). Let’s the read the request in more details: Technical […]

Filed Under: Solar Controller Circuits Tagged With: Changeover, Circuits, Mains, Panel, Simple, Solar

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