BASICS OF UPS - seminar presentation

BASICS OF UPS: 

BASICS OF UPS Seminar by: S.Murali krishnan 5050910061-B Tech EEE, SRM University, Chennai

BASICS OF UPS: 

BASICS OF UPS What is UPS? UPS – Uninterruptible Power Supply is a standby electrical Power source connected between the Power Utility and the load .

Need for UPS: 

Need for UPS Modern Electronic gadgets and computer systems are highly sensitive to the power fluctuations Disruption of power may lead to Data loss/ corruption/ malfunction etc. Standby Power Sources - Generators Starting the generator takes a few minutes. UPS is mainly used as a Power Backup for the above few minutes

Need for UPS – Contd…: 

Need for UPS – C ontd … UPS maintains power instantaneously by switching to battery in the event of a power failure or a dip (brown out) Used to condition the power supply by reducing spikes and harmonics. Designed to correct a variety of power problems - - Sags – Transient Under voltage - Surge – Short duration high voltage - Brownouts – Low voltage for long time - Spikes – Brief but high energy bursts - Line noise, frequency variation, switching transient and Harmonic distortion

Three types of UPS: 

Three types of UPS 1. Offline UPS 2. Line interactive UPS 3. Online UPS 5

1. Offline UPS: 

1. Offline UPS 6

2. Line Interactive UPS: 

2. Line Interactive UPS 7

3. Online UPS: 

3. Online UPS 8

Online UPS: 

Online UPS Main components of UPS: - Rectifier / Battery Charger - Battery - Inverter Main features for a Good UPS: - Shortest changeover time < 4mS - Sufficient battery backup time - Quality output supply 9

Online UPS: 

Online UPS 10

Online UPS - Operation: 

Online UPS - Operation 11

Online UPS: 

Online UPS Elements of UPS: - Input - Rectifier / Battery Charger - DC System - Inverter - Output - Static Bypass 12

Online UPS: 

Online UPS Elements of UPS: - Input - Rectifier / Battery Charger - DC System - Inverter - Output - Static Bypass 13

Online UPS - Input: 

Online UPS - Input 14

Online UPS - Input: 

Online UPS - Input 15

Online UPS - Input: 

Online UPS - Input 16

Online UPS - Input: 

Online UPS - Input 17

Online UPS: 

Online UPS Elements of UPS: - Input - Rectifier / Battery Charger - DC System - Inverter - Output - Static Bypass 18

Online UPS -Rectifier: 

Online UPS -Rectifier 19

Online UPS -Rectifier: 

Online UPS -Rectifier 20

Online UPS -Rectifier: 

Online UPS -Rectifier 21

Online UPS -Rectifier: 

Online UPS -Rectifier 22

Online UPS -Rectifier: 

Online UPS -Rectifier 23

Online UPS -Rectifier: 

Online UPS -Rectifier 24

Online UPS -Rectifier: 

Online UPS -Rectifier Switching speeds and power ratings – SCR Vs IGBT 25

Online UPS: 

Online UPS Elements of UPS: - Input - Rectifier / Battery Charger - DC System - Inverter - Output - Static Bypass 26

Online UPS – DC System: 

Online UPS – DC System 27

Online UPS – DC System: 

Online UPS – DC System 28

Online UPS: 

Online UPS Elements of UPS: - Input - Rectifier / Battery Charger - DC System - Inverter - Output - Static Bypass 29

Online UPS – Inverter: 

Online UPS – Inverter 30

Online UPS – Inverter: 

Online UPS – Inverter 31

Online UPS – Inverter: 

Online UPS – Inverter 32

Online UPS – Inverter: 

Online UPS – Inverter 33

Online UPS – Inverter: 

Online UPS – Inverter 34

Online UPS: 

Online UPS Elements of UPS: - Input - Rectifier / Battery Charger - DC System - Inverter - Output - Static Bypass 35

Online UPS – Output: 

Online UPS – Output 36

Online UPS – Output: 

Online UPS – Output 37

Online UPS: 

Online UPS Elements of UPS: - Input - Rectifier / Battery Charger - DC System - Inverter - Output - Static Bypass 38

Online UPS – Static Bypass: 

Online UPS – Static Bypass 39

Online UPS – Static Bypass: 

Online UPS – Static Bypass 40

Online UPS – Other points: 

Online UPS – Other points 41 Design Factors Typical Circuit Typical PCB Faults Do’s Don’ts

Online UPS – Design Factors: 

Online UPS – Design Factors 42

Online UPS – Typical Circuit: 

Online UPS – Typical Circuit 43

Online UPS – Typical PCB: 

Online UPS – Typical PCB 44

Online UPS – Faults: 

Online UPS – Faults Overload Trip Battery Low trip Output OV/ UV Over Temperature 45

Online UPS – Do’s: 

Online UPS – Do’s 46

Online UPS – Don’ts: 

Online UPS – Don’ts 47

Slide 48: 

Thank You 48