• Skip to main content
  • Skip to primary sidebar

Homemade Circuit Projects

Get free circuit help 24/7

New Projects | Privacy Policy | About us | Contact | Disclaimer | Copyright | Videos 

You are here: Home / Industrial Electronics / Remote Controlled ATS Circuit – Wireless Grid/Generator Changeover

Remote Controlled ATS Circuit – Wireless Grid/Generator Changeover

Last Updated on July 3, 2019 by Swagatam 21 Comments

The post explains a remote controlled automatic transfer switch for enabling an automatic grid to generator changeover action from a specified distance. The idea was requested by Mr. odudu johnson.

Technical Specifications

Project description: Automatic changeover switch with wireless generator control abilities or mechanism.

The generator rating is going to be between 2.2kva up to 2.5kva, and much be an automatic embedded systems generator on its own not the manual gen set...

Single phase generator and the Mains will be single phase too.. Ie 220 volts 50hz..... The system will be designed to select between two available source of power Giving preference or priority to one out of the two sources of power. In this case, the selection is between public supply Mains and generator.

The ATS should monitor the Mains supply and check for complete failure or power outage upon which it changes the load over to the generator supply, sends command to the generator wirelessly to start ie ON..

And when the public supply is restored the ATS detects this sends an off command to the generator wirelessly the return the load back to the Mains............

The communication between the ATS and Mains isn't wireless just that of the gen set.....

I'll be expecting something positive

The Design

The entire design of the proposed remote controlled wireless generator automatic transfer switch circuit can be divided into the following explained 4 stages:

1) Low voltage (brownout), Grid failure detector changeover circuit:

The following circuit controls the mains ATS by detecting a possible grid low voltage condition or a complete failure. The opamp is configured as a comparator, wherein its non-inverting pin is used as the detector input via an adjustable 10k preset.

As long as the grid mains voltage is within the normal range the output of the opamp remains high, keeping the two relay driver stages switched ON.

The  first relay changeover stage comprises a DPDT relay and it forms the main ATS grid to generator changeover controller relay, while the other smaller relay becomes responsible for controlling the transmitter circuit.

While the grid mains is active, both the relays stay activated, the DPDT supplies the grid AC to the home appliances through the relevant N/O contacts. The SPDT relay keeps the transmitter (Tx) circuit switched ON so that a continuous wireless signal is sent in the atmosphere for the Rx (receiver) circuit, which is supposed to be attached with generator system somewhere in the vicinity.

caution electricity can be dangerous

 

 2) The Transmitter (Tx) Circuit:

The following diagram depicts the transmitter (Tx). The N/O contact connections from the above shown SPDT relay is connected across any one of the 4 switches (as desired)..... that is any one among the shown SW1---SW4 switches

 

3) The Receiver Circuit (Rx):

The next diagram which may be witnessed below, is the receiver (Rx) circuit, which is positioned near the generator system and is configured to respond to the above shown Tx signals and keep the generator either ON or OFF, depending upon the grid mains availability.

When the grid mains is present, one of the selected switches (SW1----SW4) from the above Tx circuit is toggled ON by the SPDT relay in the first opamp circuit.

The wireless remote signals from the Tx unit is detected by the below shown Rx circuit, resulting in a low logic signal across one of the 4 outputs (A-----D) corresponding to the particular selected input of the Tx circuit (SW1----SW4), as selected.

 4) The Relay Driver Stage

The following shown relay driver stage is used to respond to the above discussed Rx circuit output's low logic and activate a connected relay.

As long as the selected output of the receiver (Rx) circuit remains ON, the BC557 from the below given relay driver stage also stays ON, keeping the associated relay activated, this is supposed to happen while the grid mains is available.

As indicated below, the relay stays switched ON across its N/O contacts which in turns keeps the generator switched OFF.

However in an event of possible low grid voltage or a complete failure, the opamps controlled ATS relays reverts to the N/C contacts, toggling the load towards the generator side of the changeover, and simultaneously the transmitter circuit is switched OFF.

With no signal available for the Rx unit, the corresponding relay driver stage and the relay are also switched OFF. The relay contacts now shift to its N/C contact enabling the generator with a switch ON power.

The generator is thus switched ON and the power to the appliances is supplied and changed over by the generator mains AC, via the ATS DPDT relay contacts from the opamp circuit.

 

You'll also like:

  • 1.  Sine Wave Inverter using Bubba Oscillator Circuit
  • 2.  Simple Line Follower Robot Circuit using LM324
  • 3.  Remote Control Infrared Tester Circuit
  • 4.  Simple Tea Coffee Vending Machine Circuit
  • 5.  How to Control Motor with a Cell Phone
  • 6.  GSM Pump Motor Controller Circuit using Arduino

About Swagatam

I am an electronic engineer (dipIETE ), hobbyist, inventor, schematic/PCB designer, manufacturer. I am also the founder of the website: https://www.homemade-circuits.com/, where I love sharing my innovative circuit ideas and tutorials.
If you have any circuit related query, you may interact through comments, I'll be most happy to help!

Have Questions? Please Comment below to Solve your Queries! Comments must be Related to the above Topic!!

Subscribe
Notify of
21 Comments
Newest
Oldest
Inline Feedbacks
View all comments


Primary Sidebar

Categories

  • 3-Phase Power (15)
  • 324 IC Circuits (19)
  • 4017 IC Circuits (52)
  • 4060 IC Circuits (26)
  • 555 IC Circuits (99)
  • 741 IC Circuits (20)
  • Arduino Engineering Projects (83)
  • Audio and Amplifier Projects (118)
  • Battery Chargers (83)
  • Car and Motorcycle (96)
  • Datasheets (77)
  • Decorative Lighting (Diwali, Christmas) (33)
  • Electronic Components (101)
  • Electronic Devices and Circuit Theory (36)
  • Electronics Tutorial (120)
  • Fish Aquarium (5)
  • Free Energy (34)
  • Fun Projects (14)
  • GSM Projects (9)
  • Health Related (20)
  • Heater Controllers (30)
  • Home Electrical Circuits (106)
  • How to Articles (20)
  • Incubator Related (6)
  • Industrial Electronics (28)
  • Infrared (IR) (40)
  • Inverter Circuits (98)
  • Laser Projects (12)
  • LED and Light Effect (95)
  • LM317/LM338 (21)
  • LM3915 IC (25)
  • Meters and Testers (67)
  • Mini Projects (152)
  • Motor Controller (67)
  • MPPT (7)
  • Oscillator Circuits (25)
  • PIR (Passive Infrared) (8)
  • Power Electronics (35)
  • Power Supply Circuits (81)
  • Radio Circuits (10)
  • Remote Control (48)
  • Security and Alarm (64)
  • Sensors and Detectors (127)
  • SG3525 IC (5)
  • Simple Circuits (75)
  • SMPS (29)
  • Solar Controllers (62)
  • Timer and Delay Relay (54)
  • TL494 IC (5)
  • Transformerless Power Supply (8)
  • Transmitter Circuits (41)
  • Ultrasonic Projects (16)
  • Water Level Controller (45)

Calculators

  • AWG to Millimeter Converter
  • Battery Back up Time Calculator
  • Capacitance Reactance Calculator
  • IC 555 Astable Calculator
  • IC 555 Monostable Calculator
  • Inductance Calculator
  • LC Resonance Calculator
  • LM317, LM338, LM396 Calculator
  • Ohm’s Law Calculator
  • Phase Angle Phase Shift Calculator
  • Power Factor (PF) Calculator
  • Reactance Calculator
  • Small Signal Transistor(BJT) and Diode Quick Datasheet
  • Transistor Astable Calculator
  • Transistor base Resistor Calculator
  • Voltage Divider Calculator
  • Wire Current Calculator
  • Zener Diode Calculator

© 2023 · Swagatam Innovations

wpDiscuz