Power failure alert
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This document describes a smart power failure alert device that monitors a main power supply and sends a message when the power cuts off. It uses a transformer to convert 240V AC to 12V AC, then a bridge rectifier converts it to 5V DC to power an Arduino board. The Arduino acts as a trigger to send a message via GSM module when power fails, alerting users remotely. This device is useful for monitoring critical systems like fish tanks or factory equipment and allows timely response to power issues.
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This document describes the design and implementation of an automatic phase selector system that can select a single active phase from a three-phase power supply. The system uses relays and a gear motor to automatically switch the connection to a single-phase load to a different phase within seconds if the currently connected phase fails. This provides uninterrupted power to critical single-phase loads like prepaid meters. The system was tested and worked satisfactorily by quickly switching the load connection to an alternate active phase when the initial phase failed. This automatic switching eliminates downtime and reduces stress on staff compared to manual switching of phases during an outage.
BEEE_seminor-1.pdf
Uninterrupted power supplies (UPS) and switch mode power supplies (SMPS) both provide backup power and voltage regulation. UPS devices provide emergency backup power when main power fails by using batteries. There are two main types of UPS - offline UPS which has a faster changeover time than inverters, and online UPS which remains connected to batteries even when main power is available. SMPS efficiently converts power from a source to a load using a switching regulator. It has stages for input rectification, inversion, output transformation and regulation. Both UPS and SMPS provide advantages like voltage stabilization, surge protection and smaller size, but also have disadvantages such as higher maintenance costs and electromagnetic interference.
Automatic gridsynchronizationusingmicrocontroller
This document describes an automatic grid synchronization system using a microcontroller. The system monitors voltage and frequency from external power sources connected to the grid. It detects any abnormalities outside acceptable limits that could cause failures. When deviations are sensed, the erring power source is automatically disconnected from the grid to prevent large blackouts. This warns the grid in advance so alternatives can prepare. The system uses a microcontroller to monitor under/over voltage from comparators and a variable frequency generator to change frequency for testing. It drives a lamp load when parameters exceed thresholds, simulating a blackout. The design could further isolate problematic sources using power electronics for more precise cycle-by-cycle deviation detection.
Wk105 (1)
This circuit protects appliances from over and under voltage fluctuations using a comparator circuit with operational amplifiers. It uses a LM324 comparator IC to compare the input voltage to reference voltages provided by 6.8V and 5.6V zener diodes. If the input voltage is too high or low, a transistor drives a relay to disconnect the load. A 12V regulator supplies power and references for the comparator circuit. It provides a low-cost and reliable solution for protecting appliances from voltage fluctuations.
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- Hybrid inverters interface both grid power and renewable solar energy to provide uninterrupted 24/7 power supply. When the grid is available, power is drawn directly from it, and solar energy charges the battery. Without grid power, the inverter uses stored battery power or current from solar panels to power loads.
- The system aims to maximize the use of solar energy through intelligent charging strategies and an additional DC output to power small loads directly when solar energy is not fully utilized by the battery. It provides reliable backup power during outages while reducing costs and environmental impact over diesel generators.
IRJET- Microcontroller based Automatic Power Change Over Mechanism
This document summarizes a research paper on an automatic power changeover mechanism using a microcontroller. The system is designed to automatically switch power sources between solar, mains electricity, and a diesel generator based on availability to ensure a continuous and reliable power supply. It uses components like a transformer, rectifier, regulator, comparator, and relays controlled by a microcontroller. The switching time is fast compared to manual changeover systems due to the use of electronic components. The system is intended to reduce costs by prioritizing solar power and switching to mains electricity when available before using the diesel generator.
UPS Electrical Design and Installation
UPS Electrical Design and Installation by Critical Power Supplies.
Important considerations for the electrical design and installation of UPS systems in mission critical applications.
Where Critical Power applications are concerned, the electrical design and installation of a UPS (uninterruptible power supply) system is crucially important for several reasons.
Firstly, it must work in alignment with installations already on site and not interfere with other electrical
equipment. This is particularly important for industrial and healthcare installations where there may already
be critical equipment (medical and life support, for example) in operation.
It all starts with a site survey.
A pre-installation site survey will reveal details about the scope of the electrical work to be undertaken.
Such information will reveal, for instance, the type of electrical loads, power quality issues, harmonics, whether it is a
high, medium or low voltage installation and electrical distribution set up, including the breaker sizes already on site
and their discrimination.
If you would like more information please contact sales on 0800 978 8988 or email sales@criticalpowersupplies.co.uk
IRJET- Phase Changer Mechanism in Abnormal Conditions for Single Phase Applic...
This document describes an automatic phase changer mechanism that can operate electrical equipment even if only one phase of a three-phase power supply is available. It uses a microcontroller to continuously monitor the three phases and connect a load to the phase with the highest voltage using relays. When more than one phase is live, it prioritizes Phase 1. It displays the phase status on an LCD. The mechanism was designed to address power instability issues and allow continuous operation of equipment during phase outages or imbalances across phases. It can automatically switch the load to a different live phase if the current phase power goes out.
IOT based Three Phase Power fault monitoring with SMS alerts
This document describes an IOT-based system for monitoring faults in three-phase power transmission lines. The system uses sensors to detect faults such as line-to-line faults, overloads, over voltages and under voltages, and frequency errors. When a fault is detected, the system automatically sends SMS alerts to technicians with information about the fault type and location. This allows faults to be identified and repaired more quickly, improving power reliability and reducing equipment damage. The system was found to accurately detect and classify different fault types in real-time testing.
Substation equipment and its function 2
The document discusses the functions and types of equipment used in electrical distribution substations. It provides descriptions of common substation equipment such as power transformers, circuit breakers, disconnecting switches, bus bars, current and potential transformers, capacitors, reactors, protective relays and batteries. It also provides examples of how to calculate primary and secondary currents in transformers of different ratings and briefly discusses some common bus schemes used in Pakistan.
Joseph Staniowski - Design Project
This document describes a proposed Smart Power Information/Management System (Smartlet) that aims to reduce consumer power usage through monitoring and control of individual electrical outlets. The system allows users to view power consumption data of connected appliances and remotely control outlet power states. It is designed to educate users about high-power devices and encourage more efficient habits through awareness of energy usage and costs. The system aims to meet criteria such as low power consumption, economic feasibility, social acceptability, and integration with existing infrastructure to ensure it saves more energy than it uses.
Detectingpowergridsynchronisationfailureonsensingfrequencyorvoltagebeyondacce...
This document describes a system to detect synchronization failures in the power grid by sensing abnormalities in frequency and voltage. The system uses a microcontroller to monitor voltage levels from comparators and frequency from a variable frequency generator. It can detect under and over voltages and frequencies outside acceptable ranges. When deviations are detected, the system will drive a lamp load to indicate a potential blackout or brownout, and can isolate the erring power source from the grid. The system is designed to warn of issues in advance to allow for preventative measures. It runs on an 8051 microcontroller and uses common electronic components like op-amps, timers, and relays.
Presentation o surge protection devices
This document discusses standards for earthing and lightning protection of electrical systems. It covers the scope of IS/IEC 62305 in providing design, installation, inspection, maintenance and testing guidelines for lightning protection of electrical and electronic systems within structures. The standards aim to mitigate risks of permanent equipment failures due to lightning electromagnetic impulses. It does not cover protection against electromagnetic interference issues.
Online UPS,Battery, Solar Inverter Supplier
Scott Power Corporation is an international power conditioning company that designs and manufactures uninterrupted power supply (UPS) systems. It has worked with select vendors and contract manufacturers since 1999 to ensure its components meet high quality standards. Scott Power has a training and technical support facility in Sharjah to service customers across the Middle East, Africa, and CIS regions. It believes in pursuing excellence through people, innovation, and quality. Scott Power offers a range of UPS systems from online UPS for data centers to inverters and batteries for residential use. It also provides solar power systems, batteries, and energy management solutions. Some of Scott Power's clients include banks, hospitals, industrial companies, and government entities in UAE and other countries.
ELECTRONIC CIRCUIT BREAKER
Here an electronic circuit breaker is designed which is based on the current sensing across a series element typically a CT (current Transformer). The current sensed which is compared against the preset value proportional to the voltage by comparator which is inbuilt in arduino to generate an output that drives a relay through a MOSFET to trip the load very fastly.
The concept of electronic circuit breaker came into focus realizing that the conventional circuit breakers such as MCBs take longer time to trip.
The steadily increasing population has more demand and consumption of electric energy in the market as raised and that of equipment’s used like electrical and electronics are also costlier
So to protect the electrical system from overload or short circuit here is one possibility, which is by ultrafast acting electronic circuit breaker
The electronic circuit breaker is based on the voltage drop across a series element proportional to the load current, typically a low -value resistor.
Enhancement of Power Quality Problem by Using Dynamic Voltage Restorer
Dynamic voltage restorers (DVRs) are used to protect sensitive loads from the effects of voltage sags on the
distribution feeder. This paper presents and verifies a novel voltage sag detection technique for use in conjunction
with the main control system of a DVR. In all cases it is necessary for the DVR control system to not only detect the
start and end of a voltage sag but also to determine the sag depth and any associated phase shift. The DVR, which is
placed in series with a sensitive load, must be able to respond quickly to a voltage sag if end users of sensitive
equipment are to experience no voltage sag. The DVR can restore the load voltage within few milliseconds. A control
technique based on a proportional–integral (PI) controller and a selective controller is used. The controller is
designed in a synchronously-rotating reference frame. In fact, three independent controllers have been used to tackle
balanced and unbalanced voltage supplies. Simulation results using ‘MATLAB SIMULINK’ Sim Power System
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Intelligent Electric Power Management Using Zigbee with Advanced Metering Inf...
This project mainly focuses on reduction of power cut and power theft. The main reason for the power cut is shortage of power in the generation unit. We can rectify this problem through our project.
Whenever the generation falls behind a particular limit (it is set initially by EB) the power management system will automatically switched on. Power will be supplied to only the basic necessary equipment (as stated in the priority list) power to other load will be stopped so that huge amount of power can be saved without power cut.
In our project, this is achieved using NS2 software and using ZIGBEE. Whenever generation falls below the particular value, then the load will be automatically switched off based on priority. And it can also be done through an interrupt. Through ZIGBEE command the interrupt will be sent to microcontroller to cut the power to the particular load.
When microcontroller receiving the command, the relay will cut the power to the equipment. So the power will be saved.
In this project,the method to detect and to control the power theft is also stated. Other methods of power theft like damaging, by passing electrical power meter can also be detected and can be punished.
Man power can also be reduced. The power usage of the customer will be automatically updated in the EB station so there is no need of man power to take meter reading in the user side. After every two months the reading will be automatically resetted.
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Power failure alert
- 1. SMART POWER FAILURE ALERT Electrical & Electronics Engineering Department Date
- 2. INTRODUCTION ⮚ Smart Power failure alert is a power supply monitoring device that will trigger a message when the mains supply cuts off. ⮚ This device is helpful to inform the loss of power supply to some critical installation such as a pump in a fish tank. Once the message is sent, you will know that there is a loss of power supply and actions need to be taken to rectify the situation by providing alternative power supply or relocating the installation. 2 Electrical & Electronics Engineering Department
- 3. 3 Electrical & Electronics Engineering Department Circuit Diagram +
- 4. 4 Electrical & Electronics Engineering Department Working ⮚ A Transformer is used to Convert 240V to 12V AC supply. ⮚ Further, Using a Bridge rectifier Converting 12V AC to 5V DC supply. ⮚ This 5V DC supply can be used as an input to Arduino which can be used as a trigger to Arduino in order to send message using GSM module. ⮚ By using this GSM module the information of power failure is transmmited via SMS.
- 5. 5 Electrical & Electronics Engineering Department Advantages ● It can be used to Monitor power supply in Manufacturing factories ● Smart power failure alert is capable of alerting the respective manager head irrespective of their location ● Fixing the Power supply problem or installing an alternate supply. ● Get alerted to power cut in your industries, homes etc
- 6. APPLICATIONS • Large scale Industries • Apartments • Small scale Factories 6 Electrical & Electronics Engineering Department
- 7. 7 Electrical & Electronics Engineering Department CONCLUSION ⮚A power fail detection circuit in electrically powered apparatus comprising a power switch for the apparatus and power detection means responsive to the absence of electrical power from the power switch to provide a power fail indication. ⮚This will help to alert in case there is Power failure. ⮚Hence, power failure alert is a very useful system in case of detecting power failure ⮚In case if there is a power failure, then message is sent to the user irrespective of his location
- 8. 8 Electrical & Electronics Engineering Department REFERENCES https://planetfish.org/ Electronics 4 you
- 9. THANK YOU !