A
PROJECT REPORT ON

UPS-CUM-EPS

DEPARTMENT OF DIPLOMA IN ELECTRICAL

SHRI K.J. POLYTECHNIC
BHARUCH

Submitted By: -

Gui...
SHRI K. J. POLYTECHNIC
(Affiliated to Gujarat technological University)

Department of Diploma in Electrical

CERTIFICATE
...
This project report shall be incomplete if we do not convey our heartfelt
gratitude to those people from whom We have got ...
ABSTRACT

The project is designed The UPS helps to "smooth out" voltage, i.e. eliminate peaks that
are over a certain leve...
INDEX
SR.

NAME

NO
1.

CHAPTER:1 SURVEY REPORT
CHAPTER:2 PROBLEM IDENTIFICATION

2.

& STATEMENT OF UDP
CHAPTER:3 DISCRIP...
CHAPTER NO. 1
SURVEY REPORT
1.

SURVEY REPORT
We first discussed about the various project topic. We took opinion of few. We visited

industries. also...
CHAPTER NO. 2
PROBLEM IDENTIFICATION &
STATEMENT OF UDP
2.1 STATEMENT OF UDP
2.1 STATEMENT OF UDP
An uninterruptible power supply (UPS) is a device that protects electronic equipment from
power uncer...
CHAPTER NO. 3
PROJECT DESCRIPTION
2.1 BLOCK DIAGRAM
2.2 CIRCUIT DIAGRAM & ITS WORKING
2.3 COMPONENT LIST
3.1 BLOCK DIAGRAM

The ever increasing importance of computers in industry and commerce will increase the
need for quality...
3.2 CIRCUIT DIAGRAM & ITS WORKING

WORKING
This is the circuit diagram of a simple UPS that can deliver 12V unregulated an...
3.3 COMPONENT LIST

1.

TRANSFORMER (230 – 12 V AC)

2.

VOLTAGE REGULATOR (LM 7805)

3.

RECTIFIER

4.

FILTER

5.

BATTE...
3.3.1 TRANSFORMER
Transformers convert AC electricity from one voltage to another with a little loss of power.
Step-up tra...
The purpose of a voltage regulator is to keep the voltage in a circuit relatively close to a
desired value. They are one o...
3.3.4 FILTER
Capacitive filter is used in this project. It removes the ripples from the output of rectifier
and smoothens ...
2.3.5 BATTERY
UPS battery is used as a storage energy device, which consists of several cells in series, with
a capacity t...
3.3.6 STATIC SWITCH

static switch also known as static switch, which is a non-contact switch, is to use two
SCR (SCR) rev...
CHAPTER NO. 4
PROJECT WORK DONE
3.1 PROJECT WORK DONE
3.2 FUTURE OUTCOMES
3.1 PROJECT WORK DONE
NO.

PARTICULARS

MONTH

1.

FINDING THE TITAL OF PROJECT

JULY 2013

2.

COLLECTION OF DATA FROM IN...
BIBLIOGRAPHY
WEBSITES
http://en.kioskea.net/contents/605-uninterruptible-power-supply
http://www.utilizewindows.com-uninte...
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Mosfet based ups cum-eps

  1. 1. A PROJECT REPORT ON UPS-CUM-EPS DEPARTMENT OF DIPLOMA IN ELECTRICAL SHRI K.J. POLYTECHNIC BHARUCH Submitted By: - Guided By:-
  2. 2. SHRI K. J. POLYTECHNIC (Affiliated to Gujarat technological University) Department of Diploma in Electrical CERTIFICATE This is certify that “………………………………………………………………………….” Of diploma in electrical has completed their project “UPS-CUM-EPS” Satisfactorily during the Year 2013-14 Date:Signature of guide ________________ Head of Department ________________ ACKNOWLEDGEMENT
  3. 3. This project report shall be incomplete if we do not convey our heartfelt gratitude to those people from whom We have got considerable support and encouragement during this project. Many people have helped, provided direction, technical information and advice at all stages of our project and it’s our pleasure to say vote of thanks to all of them. However, with the help of our project guide “BINA PANDYA” it seems much more interesting to write this thesis than we expected. Also we are very much thankful for our college SHRI K. J. POLYTECHNIC, which provide us a good study environment & available access to get literature. Besides our friends showed their kindly help & support in our thesis. Because of them, living in Bharuch & studying in K.J.Polytechnic (Bharuch) is a nice time.
  4. 4. ABSTRACT The project is designed The UPS helps to "smooth out" voltage, i.e. eliminate peaks that are over a certain level. When there is a power outage, the energy stored in the emergency battery keeps the power supply flowing to equipment for a small amount of time (normally for 5 to 10 minutes). Beyond the minutes of autonomy that the UPS supplies, this gained time also allows the equipment to be switched to other energy sources. Some UPSs can also be directly attached to the computer (e.g. with a USB cable) so that it can order its own shutting off in case of a power outage and thus avoid any data loss.
  5. 5. INDEX SR. NAME NO 1. CHAPTER:1 SURVEY REPORT CHAPTER:2 PROBLEM IDENTIFICATION 2. & STATEMENT OF UDP CHAPTER:3 DISCRIPTION OF UDP 2.4 CIRCUIT DIAGRAM & ITS WORKING 2.5 OPERATION 2.6 BLOCK DIAGRAM 2.7 COMPONENT LIST 3 CHAPTER: 4 PROJECT WORKDONE& 4 FUTURE OUTLINE 4.1PROJECT WORKDONE 4.2 FUTURE OUTLINE 5. BIBLOGRAPHY PAGE NO. SIGN
  6. 6. CHAPTER NO. 1 SURVEY REPORT
  7. 7. 1. SURVEY REPORT We first discussed about the various project topic. We took opinion of few. We visited industries. also but we did not get any interesting idea. Then we started looking for the project on internet. We searched different sites which includes information regarding our filed. The sites which are visited by us is as follow: www.beyondlogic.org, www.wekipedia.com www.alldatasheet.com, www.howstuffworks.com.)We also took references from different books like electric circuit, basic electronics, machine-1 and machine-2 etc. Then we saw list of project names on internet. We read details of many projects. Then we saw this project on net and we studied it in details. We found this project interesting and useful in industries. We finally discussed it in our group and selected it by our side. Then we also took reference of our seniors and professors of our college. They also gave us positive feedback. Then finally we saw it to our guide and he accepted our project topic.
  8. 8. CHAPTER NO. 2 PROBLEM IDENTIFICATION & STATEMENT OF UDP 2.1 STATEMENT OF UDP
  9. 9. 2.1 STATEMENT OF UDP An uninterruptible power supply (UPS) is a device that protects electronic equipment from power uncertainties. A UPS is a device that is interfaced between the electric network (connected to utility power) and the materials that need protecting. The UPS allows the materials to be switched to emergency battery power for several minutes in case of electrical problems, in particular during: Power line disturbances, i.e. a split second power outage that can cause a computer to restart Power outages, corresponding to a break in the power supply for a given amount of time Overvoltage, i.e. a nominal value greater than the maximum value needed for the normal functioning of electrical appliances Undervoltage, i.e. a nominal value less than the maximum value needed for the normal functioning of electrical appliances Voltage spikes, i.e. high amplitude transient (short-term) overvoltage. These spikes are caused when powerful devices are stopped or started and overtime can damage electrical components Lightening, which is a source of extreme overvoltage that occur suddenly during bad weather (storms) Most electrical disruptions are tolerated by computer systems. However, sometimes they can cause data loss and service interruptions and even material damages.
  10. 10. CHAPTER NO. 3 PROJECT DESCRIPTION 2.1 BLOCK DIAGRAM 2.2 CIRCUIT DIAGRAM & ITS WORKING 2.3 COMPONENT LIST
  11. 11. 3.1 BLOCK DIAGRAM The ever increasing importance of computers in industry and commerce will increase the need for quality, high stability and interruption free power supplies. A clean ac power source is the fundamental to the operation of most sensitive electronic equipment, and many new and sophisticated circuits are designed to overcome the effects of disturbances normally found in the mains ac supply. In order to protect a sensitive system from power losses and blackouts, an alternative power source is required that can switch into operation immediately when disruption occurs. An interruptible power supply (UPS) is just such an alternative source. A UPS generally consists of a rectifier, battery charger, a battery bank and inverter circuit which converts the commercial ac input into dc suitable for input to the battery bank and the inverter. The rectifier should have its input protected and should be capable of supplying power to the inverter when the commercial supply is either slightly below the normal voltage or slightly above.
  12. 12. 3.2 CIRCUIT DIAGRAM & ITS WORKING WORKING This is the circuit diagram of a simple UPS that can deliver 12V unregulated and 5V regulated DC. The transformer T1 steps down the mains voltage to 12V AC and then the bridge B1 rectifies it. The rectified signal is smoothed by the capacitor C1.When the mains supply is available the battery will be charged via diode D3 and the regulator IC gets supply via diode D5. 12V and 5V DC will be available at the output terminals. When mains supply is not available the battery supplies current to the regulator IC and to the 12V DC terminal through diode D4.Also, the diode D3 blocks reverse flow of current during battery mode. Capacitors C2 and C3 acts as filters. working principle of UPS From basic principles in terms of application, UPS is a device that contains stored energy in order to inverter as the main component, regulated stable frequency output power protection equipment. Mainly by the rectifier, batteries, power inverters and static switch of several components.
  13. 13. 3.3 COMPONENT LIST 1. TRANSFORMER (230 – 12 V AC) 2. VOLTAGE REGULATOR (LM 7805) 3. RECTIFIER 4. FILTER 5. BATTERY 6. STATIC SWITCH 7. LED 8. DIODE (1N4007) 9. RESISTOR 10. CAPACITOR
  14. 14. 3.3.1 TRANSFORMER Transformers convert AC electricity from one voltage to another with a little loss of power. Step-up transformers increase voltage, step-down transformers reduce voltage. Most power supplies use a step-down transformer to reduce the dangerously high voltage to a safer low voltage. FIG 2.1: A TYPICAL TRANSFORMER The input coil is called the primary and the output coil is called the secondary. There is no electrical connection between the two coils; instead they are linked by an alternating magnetic field created in the soft-iron core of the transformer. The two lines in the middle of the circuit symbol represent the core. Transformers waste very little power so the power output is (almost) equal to the power input. Note that as voltage is stepped down and current is stepped up. 3.3.2 VOLTAGE REGULATOR 7805
  15. 15. The purpose of a voltage regulator is to keep the voltage in a circuit relatively close to a desired value. They are one of the most common electronic components, the are used since a power supply can produce high current that can damage one component/or whole of the circuit. Voltage regulators have variety of functions. It all depend on the application. Voltage can be changed by varing the source voltage or Varyng the input impedance of the regulator being used. Features • Output Current up to 1A. • Output Voltages of 5, 6, 8, 9, 10, 12, 15, 18, 24V. • Thermal Overload Protection. • Short Circuit Protection. • Output Transistor Safe Operating Area Protection. 3.3.3 RECTIFIER A rectifier is an electrical device that converts alternating current (AC), to direct current (DC), current that flows in only one direction, a process known as rectification. Rectifiers have many uses including as components of power supplies and as detectors of radio signals. In this project, a bridge rectifier is used because of its merits like good stability and full wave rectification. In positive half cycle only two diodes( 1 set of parallel diodes) will conduct, in negative half cycle remaining two diodes will conduct and they will conduct only in forward bias only.
  16. 16. 3.3.4 FILTER Capacitive filter is used in this project. It removes the ripples from the output of rectifier and smoothens the D.C. Output received from this filter is constant until the mains voltage and load is maintained constant.. The simple capacitor filter is the most basic type of power supply filter. The use of this filter is very limited. This filter is also used in circuits where the power-supply ripple frequency is not critical and can be relatively high. Below figure can show how the capacitor changes and discharges.
  17. 17. 2.3.5 BATTERY UPS battery is used as a storage energy device, which consists of several cells in series, with a capacity to maintain its size determines the discharge (supply) time. Its main function is: When the electricity is normal, the energy converted into chemical energy stored in the battery internal; when the electricity fails, the chemical energy into electrical energy provided to the inverter or the load.
  18. 18. 3.3.6 STATIC SWITCH static switch also known as static switch, which is a non-contact switch, is to use two SCR (SCR) reverse parallel composition of a communication switch, its closed and disconnected from the logic controller control. Conversion and the model is divided into two kinds of type and. Conversion-type switch is mainly used for two-way power supply system, its role is to achieve all the way to another road from the automatic switching; and model switch is mainly used for parallel inverters with electricity or more inverter.
  19. 19. CHAPTER NO. 4 PROJECT WORK DONE 3.1 PROJECT WORK DONE 3.2 FUTURE OUTCOMES
  20. 20. 3.1 PROJECT WORK DONE NO. PARTICULARS MONTH 1. FINDING THE TITAL OF PROJECT JULY 2013 2. COLLECTION OF DATA FROM INTERNET AUGUST 2013 4. GET DETAIL OF COMPONENT 5. ANALYSIS OF CIRCUIT DIAGRAM 6. PREPARATION OF THE REPORT WITH PRESENTATION SEPTEMBER 2013 OCTOBER 2013 3.2 FUTURE OUTCOMES SRNO. PARTICULARS MONTH 1. COLLECT THE COMPONENT FROM MARKET JAN 2014 2. DESIGN CIRCUIT FEB 2014 4. TESTING OF CIRCUIT ANALYSIS MARCH 2014 5. PREPARE FINAL REPORT MARCH 2014 6. SUBMISSION APRIL 2014
  21. 21. BIBLIOGRAPHY WEBSITES http://en.kioskea.net/contents/605-uninterruptible-power-supply http://www.utilizewindows.com-uninterruptible-power-supply-ups http://www.cclonline.com/UPS-Battery-Backup/An-introduction-to-UPS

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