Category: Electrical Projects

Automatic Phase Changeover Circuit for Continuous Power Supply

Engineeering Projects
automatic phase changeover circuit

The most important feature in a three-phase electrical system is that the supply of power to critical equipment must not be interrupted, especially at places where voltage fluctuations are common. The practical solution for this problem is an automatic phase changeover circuitry. It enables the equipment to smoothly switch to another phase in case one or more phases have low voltage, thereby ensuring a continuous power supply. In this article, we explain how an automatic phase changeover circuit works, what its main components are, and how you can build a…

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Relay Latching Circuit: How to Design

Engineeering Projects
relay latching circuit prototype

Upon reading this article, users will understand industrial relays comprehensively, including their pin configuration and Relay Latching Circuit switching mechanisms. A relay is an essential electromechanical switch, consisting of a coil as its electrical component and contacts as mechanical components. It plays a pivotal role in industrial automation, facilitating switching operations and logical control. The relay discussed in this article is a 10A, 220V AC DPDT industrial-type relay, with a coil voltage of 220V AC. It features two poles, each equipped with a Normally Closed (NC) and Normally Open (NO)…

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How to Setup Digital Programmable Timer TM-612

Engineeering Projects
step 2 of digital programmable timer TM-612

How to Setup Digital Programmable Timer TM-612 Performing a simple task like turning ON/OFF a system every day just by pressing a button can become tedious when you have to travel long distances to do it. This can cost time and sometimes even money if there are hurdles when traveling. So, introducing “TM-619-2” from Frontier, A Multipurpose 7 Day Programmable Digital Timer. This digital timer has a wide range of power supply options: – 240Vac main supply, 120Vac main supply, 24Vac or 24Vdc, 12Vac or 12Vdc. The digital timer comes…

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Automatic Submersible Pump Controller Circuit

Engineeering Projects
Automatic submersible pump controller circuit

The automatic submersible pump controller circuit posted here is used to automate the operation of an electrical submersible pump (ESP) based on the level of water in the overhead tank. The Automatic submersible pump controller circuit can be used as a standalone system and can be interfaced with the existing manual control panel. Introduction to electrical submersible pump (ESP) Electrical submersible pumps, often called ESP are single or multiple-stage radial flow pressure series impeller pumps that are closely coupled to the motor for low and medium heads. ESPs are efficient…

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Water Temperature Controller Circuit

Engineeering Projects
Water Temperature Controller Circuit

The article posted here is of Water Temperature Controller Circuit based on PT100. For temperature indication, a LED bar graph designed using 8-LEDs is used. PT100 is a temperature transducer that produces changes in impedance whenever the temperature changes. It has definite resistance at each temperature within its temperature range because it is made from temperature-sensitive elements. The reasons for using platinum type temperature transducers are cheap, high stability, and wide operating temperature range i.e. -1800C to 800C. Check out the article on Resistance Type Thermometer PT100 is a probe…

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Three Phase AC Voltage Measurement using Arduino

Engineeering Projects
Three Phase AC Voltage Measurement using Arduino prototype

Today, in this article, you will learn how to make Three Phase AC Voltage Measurements using Arduino. At first, we will show you how to measure single-phase AC voltage and then measure three-phase AC voltage. Features of Three Phase AC Voltage Measurement using Arduino: Can measure AC voltage of any amplitude. Show individual phase voltage. LED indication for individual phase voltage. For the protection of the control board (Arduino Board), a variable resistor is used i.e. output voltage must not be more than 4.5V even when Zener diode burnout. Working…

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Spikes Free Power Control

Engineeering Projects
spikes free power control circuit

Here in this article, we will learn how to design spikes free power control circuits using a few electronics components like a transformer, transistor, etc. The commercially available lamp dimmers and other power control units create several problems associated with them. These incorporate SCR and diac-triac pairs, and the variation of power is achieved by varying the firing angle of these devices. This results in distorted waveform along with RF (radio frequency) spikes across the load. These RF spikes are received by frequency-sensitive instruments, TV, Radio, etc. Such interference with…

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Three Phase Power Surge Protector Circuit

Engineeering Projects
three phase surge protector circuit

Three are two types of electrical/electronics appliances based on the main supply it requires. Generally, heavy electrical equipment requires a three-phase main supply for working. Three-phase mains supply has three different phases each are placed at 1200 angle with each other. In this post, you will learn how to design a three-phase power surge protector circuit using timer IC 555. A three-phase electrical appliance is expensive and requires all phase supplies, if voltage fluctuates or fails in any phase operation of the appliance may malfunction or become dead. In order…

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Single Phase Preventer with Under/Over Voltage Cutout

Engineeering Projects
single phase preventer with under over voltage cutout

For a 3-phase induction motor, all three phases of the supply must be present. If any of the phases is missing, or a fuse is blown, the motor will continue to run with two phases only. But in that case, it will draw a very large current, and it may burn unless switched off immediately. To solve this problem the project “Single Phase Preventer with Under/Over Voltage Cutout” is posted here. For the protection of a three-phase induction motor, various types of starters are utilized. But the problem with Starters…

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Phase Sequence Change Indicator

Engineeering Projects
3-phase sequence change indicator

The project phase sequence change indicator using 555 IC is used to indicate whether there is a change in phase sequence occurring or not by a beeper or a LED. We all know that in three-phase motor phase sequence is important because the change in phase sequence may cause trouble in machines. Circuit Description of Phase Sequence Change Indicator The circuit of phase sequence change indicator is divided into two main sections i.e. controlling section and the beeper section. The circuit of the phase sequence change indicator is shown in…

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