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Welcome To The
Presentation of UPs
Ups( Uninterruptable Power Supply)
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An uninterruptable power supply (Ups) is a device that allows a computer to keep running at least a short time .when primary power source is lost .It also
provides protection from power fluctuation . Thus we can say that Ups is a
device that helps to provide consistent power to computer system
INTRODUCTION
INDEX
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INTRODUCTION
INDEXTYPES OF UPS
Ups
ONLINE UPs OFFLINE UPs LINE INTERACTIVE UPs
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In this type of Ups , the system always remains on the Battery, Weather main is
present or not.
Online UPsINTRODUCTION
INDEXTYPES OF UPS
ONLINE UPS
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INTRODUCTION
Battery Charger
Battery DC to Ac Inverter
OUTPUTWhen Main AC is ON
(Block Diagram Of Online Ups)
Inpu
t
Main AC
Online UPsINTRODUCTION
INDEXTYPES OF UPS
ONLINE UPS
When Main AC is Present, it provides power to DC Supply Of inverter Section as well as charges the battery simultaneously .
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INTRODUCTION
INDEXTYPES OF UPS
ONLINE UPS
Online UPs
Battery Charger
Battery DC to Ac Inverter
OUTPUT
When Main AC is cutoff
(Block Diagram Of Online Ups)
Inpu
t
Main AC
When Main AC is not present, it will run the connected load till the battery has a recommended discharge level.
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INTRODUCTION
INDEXTYPES OF UPS
ONLINE UPS
Advantage of Online UPsWhen we use Online Ups there is no chance of surges , spikes ,
sags ,black out because the Main Ac passes through battery which gives accurate voltage supplies in any condition..
Another advantage is that it passes charge regular through battery so there is no chance of failure of circuit like , change over timing or change over circuit.
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INTRODUCTION
INDEXTYPES OF UPS
ONLINE UPS
Disadvantage of Online UPs In online Ups system always remain on battery, whether the Main
Ac is present or not. When Main Ac is present it supplies DC to battery section for charging as well as battery also send charge to inverter section for Main Output. Due to this no battery life in Online Ups
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INTRODUCTION
INDEXTYPES OF UPS
Offline UPs
OFFLINE UPS
ONLINE UPS
When Main AC is present ,AVR provides as output as is the Input mains.
OFFLINE UPS
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INTRODUCTION
INDEXTYPES OF UPS
ONLINE UPS
Offline UPsAutomatic Voltage Regulator(AVR)
OUTPUT
Running On Normal ACIn
put
Main AC
DC to Ac InverterBattery Charger Battery
Circuit Closed
Open Circuit
Offline Ups use automatic voltage regulator (AVR) to regulate the output voltage close to 220V AC.
Offline Ups are normal weight Ups and are widely used for domestic computers.
(Block Diagram Of Offline Ups)
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Automatic Voltage Regulator(AVR)
OUTPUT
Running On Normal AC is cutoffIn
put
DC to Ac InverterBattery Charger Battery
Circuit Open
Circuit Closed
Inpu
t
OFFLINE UPS
INTRODUCTION
INDEXTYPES OF UPS
ONLINE UPS
The Main is to battery changeover time or battery to mains changeover time on offline Ups is very low(3.8 milliseconds) as compared to inverter 500 milliseconds.
(Block Diagram Of Offline Ups)
Offline UPs
Main AC
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INTRODUCTION
INDEXTYPES OF UPS
Advantage of Offline UPs
OFFLINE UPS
ONLINE UPSWhen Main AC is present , current passes through AVR(Automatic Voltage regulator) there is no load on battery all time therefore In offline Ups battery life is longer .
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INTRODUCTION
INDEXTYPES OF UPS
Disadvantage of Offline UPs
OFFLINE UPS
ONLINE UPS In offline Ups accuracy is less than online Ups because it
passes charge through AVR therefore there would be little chance of surge and spikes passes.
If there is problem in change over circuit it shutdown the PC.
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Line interactive Ups work like online and offline Ups.
OFFLINE UPS
INTRODUCTION
INDEXTYPES OF UPS
ONLINE UPS
Line Interactive UPS
Line Interactive UPs
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OFFLINE UPS
INTRODUCTION
INDEXTYPES OF UPS
ONLINE UPS
Line Interactive UPS
Line Interactive UPsOUTPUT
Running On Normal AC
DC to Ac InverterBattery Charger Battery
Circuit closed
Circuit Open
Cutoff TimerAutomatic Voltage Regulator(AVR)
Inpu
t In
put
+110 volt
-110 volt0 volt
When main Ac flows normal ,it works like offline UPs
Main AC
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OUTPUT
Under/ over voltage condition
DC to Ac InverterBattery Charger Battery
Circuit Open
Circuit closed
Cutoff TimerAutomatic Voltage Regulator(AVR)In
put
+110 volt
-110 volt0 volt
When there is fluctuation in Main AC , Cutoff timer cut the flow path of AC through AVR for specific time thus charge flow through the Battery . At this state Ups works as Online UPs
OFFLINE UPS
INTRODUCTION
INDEXTYPES OF UPS
ONLINE UPS
Line Interactive UPS
Line Interactive UPs
Inpu
t Main AC
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OUTPUT
Black out condition
DC to Ac InverterBattery Charger Battery
Circuit Open
Circuit closed
Cutoff TimerAutomatic Voltage Regulator(AVR)In
put
+110 volt
-110 volt0 volt
When Main AC is not present , it will run the connected load till battery has a recommended discharge level.
OFFLINE UPS
INTRODUCTION
INDEXTYPES OF UPS
ONLINE UPS
Line Interactive UPS
Line Interactive UPs
Inpu
t Main AC
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OFFLINE UPS
INTRODUCTION
INDEXTYPES OF UPS
ONLINE UPS
Line Interactive UPS
Advantage of Line Interactive UPs
Output power accuracy of line interactive Ups is higher than offline Ups because it passes Main Ac through Battery if there is fluctuation in Main AC.
If there is no fluctuation in Main AC then it bypass through AVR(automatic voltage regulator )which can save Battery Life.
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OFFLINE UPS
INTRODUCTION
INDEXTYPES OF UPS
ONLINE UPS
Line Interactive UPS
Disadvantage of Line Interactive UPs
Output power supplies of accuracy is less than online Ups because it works on both AC and battery mode.
System may shutdown if there is problem comes in change over circuit.
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OFFLINE UPS
INTRODUCTION
INDEXTYPES OF UPS
ONLINE UPS
Line Interactive UPS
Inverter Vs UPS
InverterUPsVs
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OFFLINE UPS
INTRODUCTION
INDEXTYPES OF UPS
ONLINE UPS
Line Interactive UPS
Inverter Vs UPS
Circuit Sections Of Inverter1. Charging2. Inverter
OUTPUT
On Normal Main AC is present
DC to Ac InverterCircuit Open
Circuit closed
Main ACIn
put
Battery Charger Battery
Inverter supply unregulated power supply when Main AC is present.
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OFFLINE UPS
INTRODUCTION
INDEXTYPES OF UPS
ONLINE UPS
Line Interactive UPS
Inverter Vs UPS
Circuit Sections Of UPs
OUTPUT
On Normal Main AC is present
DC to Ac InverterCircuit Open
Circuit closed
Main ACIn
put
Battery Charger Battery
AVR
Ups supply regulated power supply with the help Of AVR technology when main AC is present
1.Charging2.Inverter3.AVR(automatic voltage Regulator)
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OFFLINE UPS
INTRODUCTION
INDEXTYPES OF UPS
ONLINE UPS
Line Interactive UPS
Inverter Vs UPS
Change Over Time
On Normal Main AC is present
DC to Ac InverterCircuit Open
Relay
Inpu
t Battery Charger Battery
AVR
Main AC
OUTPUT
The mains to battery changeover time to battery to mains changeover time in offline Ups is very low(3-8 milliseconds) as compared to inverter(500 milliseconds) therefore no chance to shutdown the PC when change over circuit changes switches the connection from main AC to battery mode or from Battery Mode to Main AC.
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OFFLINE UPS
INTRODUCTION
INDEXTYPES OF UPS
ONLINE UPS
Line Interactive UPS
Inverter Vs UPS
DC to Ac InverterIn
put
Battery Charger Battery
AVR
Overload Led
No load Led
Low AC Main Led
High AC Main Led
Low Battery Led
Earth
Main AC
OUTPUT
Buzzer
Automatic Section
On Low Battery /overload Battery Sensor
Relay
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OFFLINE UPS
INTRODUCTION
INDEXTYPES OF UPS
ONLINE UPS
Line Interactive UPS
Inverter Vs UPS
UPS Power
RatingUPS power Rating
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OFFLINE UPS
INTRODUCTION
INDEXTYPES OF UPS
ONLINE UPS
Line Interactive UPS
Power RatingTrue Power (watts) or Apparent Power(VA)
Inverter Vs UPS
UPS power Rating
The power rating of electric component is measured in Watts Or Volt Amperes(VA).
UPS manufacturers mainly used VA to describe the output ratings.
The output rating of UPS determines the maximum load that can be continuously supported by the UPS when the main supply fails.
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OFFLINE UPS
INTRODUCTION
INDEXTYPES OF UPS
ONLINE UPS
Line Interactive UPS
Inverter Vs UPS
UPS power Rating
Power factor(Pf)In an AC circuit the relationship between real and reactive power is known as Power factor(Pf).
Power Factor(Pf)=watts/VA
Pf values varies between 0.6 to 0.8(normally 0.8)
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OFFLINE UPS
INTRODUCTION
INDEXTYPES OF UPS
ONLINE UPS
Line Interactive UPS
Inverter Vs UPS
UPS power Rating
Power RatingFor a Desktop PC(normally load =500 watts)
Required UPS power rating
VA=Watts/Pf 500/0.8=625 VA
For a UPS having power rating=2500 VA
Maximum load that continuously can be supportedWatts=VA*pf
2500*0.8=2000 watts
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QSession&A
OFFLINE UPS
INTRODUCTION
INDEXTYPES OF UPS
ONLINE UPS
Line Interactive UPS
Inverter Vs UPS
UPS power Rating
Question & Answer Session
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Thank youOFFLINE UPS
INTRODUCTION
INDEXTYPES OF UPS
ONLINE UPS
Line Interactive UPS
Inverter Vs UPS
UPS power Rating
Question & Answer Session
Thank you