What is UPS and how does it work?
Do you know
what is UPS? Why is it used and what are the types? If you are a computer user,
then you may already know about UPS because it is used in most computers.
But even if
there is no complete information, there is no need to panic because in today's
article we will try to provide information in the context of what is UPS.
During our daily work, we go through a state of power cut in a lot of time. By
the way, other electrical appliances of the house such as Fan, Light, TV,
Fridge are not affected much because they do not need continuous power supply.
But if you
have a computer system that is useful, then to use it properly, continuous
power is always required, in such a case that if there is a Power Cut, then
there is a risk of our data loss. Just to overcome this problem, we need a
device that can provide us with interruption free power supply. This type of
device is called UPS.
This UPS or
uninterruptible power supply (UPS) is a device that continuously supplies power
to the devices connected with it. If I say in easy language, then it is a surge
bar with which a battery is attached.
Even if the
power is cut, the battery supplies the power of that need until your main power
is restored or the full charge of that battery is used. If you want to know
more about UPS then you should read this post UPS completely, because I have
tried to provide more information related to UPS as well.
Hope you
like my efforts, then let's start without delay and get complete information
about what the UPS does and how it works.
Topic
sequence
- What is UPS?
- What is the full form of UPS?
- What is the need of UPS
- Some important parts of UPS
- What are the main power supply problems:
- Types of UPS: -
- What is the difference between UPS and Inverter
- What are the benefits of UPS:
- What are the disadvantages of UPS:
- Conclusion
What is
UPS?
UPS is an electrical device that provides emergency power to a load if the input power source or mains power fails.
What is UPS and how does it work? |
What is UPS
?
UPS always
supplies power to the load continuously whether main supply is OFF or ON. UPS's
main application is that it supplies power to us in the absence of main power
supply so that our device does not have any issues. UPS has its source of
energy batteries.
The backup
time of any UPS (which means how long the UPS can provide power to the load in
the absence of the main power supply) depends on the type and quantity of the
batteries used in it.
What is the
full form of UPS?
The full form
of UPS is Uninterrupted Power Supply. This means that we can use UPS according
to an alternative power source that can continuously provide us with
interruption free power supply load.
What is the
need of UPS ?
As
development took place in electronics and computer based devices, the use of
sensitive electronics equipment such as personal computers, super computers,
data processors, digital controllers, etc. also increased.
Such devices
require an interruption free power supply, as these devices use Memories and
Processors to handle data. As we know that these devices are very sensitive
regarding corrupted power supply.
For example,
if you turn off a personal computer directly by removing its power plug,
without shutting it down, then you can do data loss and sometimes even your
computer's operating system is corrupted. Can.
In order to
solve these problems, UPS is used for Device and Data Safety on Domestic Tor
and Industrial Tor.
Some
important parts of UPS
If we talk
about the important parts of UPS, then it mainly consists of the following
parts, about which we will learn later in details:
• Rectifier
(Battery Charger)
• Static By Pass
or Switch or Contactor
• Battery
• Inverter
Rectifier:
As we all
know that the main t function of rectifier is to convert AC into DC. It is used
to charge the battery and it hangs in the inverter circuit. Its output depends
on the load requirement.
There are
two main functions of this rectifier. The first is that it is used to charge
the batteries, so that the batteries are always in proper float voltage.
Where some
manufacturers just trickle charge the batteries to keep them in proper float
voltage. At the same time some manufacturers use more sophisticated method
(three steps) in which first fast charge is up to 90%, after that slow charge
is up to 100%, and finally a turn off charger once this ba The tteries were fully charged then.
At the same
time, its second function is that the rectifier is used to convert incoming
power from A / C to D / C.
Static
Bypass:
Most of the
online UPSs have an internal static bypass circuit that works like a first line
of defense whenever you experience failure within the UPS system.
Whenever
there is system failure, this static bypass automatically turns off the circuit
and diverts the incoming power to the rectifier, batteries and inverter so that
it can directly load the utility grade power (unconditioned).
Suppose it
is not conditioned power, but still it helps in functioning your systems
properly if ever the internal components of UPS fail.
Battery:
This battery
is the heart of any UPS system. These Batteries are mainly used to store
energy. Remember, if the main power fails in future, then these batteries are
used. These batteries mainly use lead and acid. And these are always the
reactions in acids.
These
batteries also have lifespan and have to be replaced after a few years. The age
of batteries ranges from 4 to 6 years. Special care has to be taken of these
batteries and distilled water has to be filled from time to time, which helps
in the reaction going on in it.
Inverter:
This
inverter is the final and main part of the UPS system. It works exactly the
opposite of the rectifier process. This means that they convert the incoming DC
supply to AC to use the load. It accepts D / C from D.C buss and further
supplies it to rectifier and battery.
If ever
there is a power failure then rectifier and current cannot provide D / C buss
so that power only provides batteries only to the entire system. These
batteries continue to provide power to the D / C buss until they become
deplete.
Once the
batteries are deplete, the system reaches a state of jeopardy and is in search
of external power source. Where it is provided with the help of power generator
from outside.
The output
of the inverter is sinewave. This D.C. Converts to A.C of constant frequency
and amplitude.
What are
the main power supply problems:
Many types
of interruptions occur in different forms in the Mains power supply. These
fluctuations can damage our sensitive electronic equipment and data. Therefore,
the best solution is to use UPS. Let us know about some such corruptions:
1. Voltage Fluctuations: In Mains power supply, often the
voltage increases or decreases, compared to the rated voltage. For example, in
our homes the voltage fluctuates from 210 Volts to 240 volts.
We can use
digital voltmeter to see these fluctuations. The more these fluctuations, the
more damage it can do to our devices.
2. Transient Impulses: The original sine wave of
alternating supply can be easily disturbed for any reason due to which
fluctuations in amplitude can be seen. These disturbances are also called Transient
Impulses.
The instant
increase of amplitude is called spike and the instant decrease is called notch.
3. Voltage Surges: When we connect a heavy load to the
power supply, then the voltage of the entire system may increase or decrease
for some time. This variation is called Voltage Surges.
4. Noise: Distortion in Alternating Sine Wave
which comes for short time is called Noise. The main reason for their origin is
Radio and TV transmission, or also poor grounding. Noise can cause damage to
data and equipment.
5. Frequency Variation: If instantaneous change was seen in
the load, then it can cause variation in the supply’s frequency, which can
damage the data.
6. Black Outs: If for any reason, if instant
failure was seen in the mains power supply then it is called black outs. This
is not true for equipment.
7. Brown Outs: If there are Planned power cuts due
to overloading of power, then it is called brown outs.
Types of
UPS: -
Many types
of design are used to implement UPS systems, where all have distinct
performance characteristics. The most common design approaches that are
followed are:
Standby
Line
Interactive
Standby
online hybrid
Standby-freeUPS
Double
conversion on-line
Delta
Conversion On-Line
The Standby
UPS
This standby
UPS is the most common type that is used in personal computers. In this UPS,
the transfer switch is set to select filtered AC input according to the primary
power source (solid line path), and these switches will switch the battery /
inverter to a backup source if the primary source fails. Then
UPS
This Line
Interactive UPS is also a very common design that is used in small business,
web, and departmental servers. According to its design, the battery-to-AC power
converter (inverter) always has to be connected with the output of the UPS.
When the AC
power of the input is normal, then it is operating the inverter in reverse
order, so that it is charging.
When the
input power fails, then the transfer switch opens and the UPS output from the
power battery flows more. Here the inverter is always on and connected with the
output, so it provides additional filtering design and produces fewer switching
transients than standby UPS. Apart from this, it also performs voltage
regulation properly.
Standby
On-Line Hybrid
These
Standby On-Line Hybrids are also known as "on-line" UPS. This type of
UPS is used below 10kVA. In this, the standby DC tDC converter battery is
switched on when main AC power failure is detected, just like in a standby UPS.
In this, the
battery charger is also very small, as in a standby UPS. Due to the DC combiner
having capacitors, UPS does not exhibit any transfer time during AC power
failure. This design is also sometimes used with an additional transfer switch
so that it can be bypassed by any malfunction or overload.
The Standby-freeUPS
There was a
time when Standby-freeUPS was the most used in the range of 3-15kVA. Its design
depends on a special saturating transformer that has three windings (power
connections).
Its primary
power path is starting from AC input, from transfer switch, to transformer, and
finally to output. When power failure occurs, the transfer switch opens, and
the inverter picks up the output load.
In the
design of these Standby-Free, the inverter is in standby mode, and it is
energized when the input power fails and the transfer switch opens. This
transformer has special "Free-resonant" capability, which provides
limited voltage regulation and "shaping" the output waveform.
The
isolation which provides Freetransformer due to AC power transients is better
than any available filter. Even though it is a standby UPS by design, this
Standby-Ferr generates very high heat as it is inefficient from the very
beginning. The design of these UPSs is also much larger and heavier than the
rest.
The reason
for these UPS not being used anymore is that they can be fundamentally unstable
when they are working according to the power supply load of a modern computer.
All large
servers and routers use "Power Factor Corrected" power supplies that
provide a negative input resistance above some frequency range; When combined
with a high and resonant impedance Free transformer, it can produce spontaneous
and damaging oscillations.
The Double
Conversion On-Line UPS
This is a
very common type of UPS above 10kVA. It is like a standby UPS, but it has a
primary power path inverter in lieu of AC main.
In a Double
Conversion On-Line design, the transfer switch is not activated by the failure
of the input AC, because the input AC here is not the primary source, but it is
the backup source. But this on-line mode of operation shows the transfer time
only when the power that comes from the primary battery charger / battery /
inverter fails with the power path.
This happens
when any block fails in this power path. Here the inverter power also drops out
for some time, causing a transfer, this transfer can occur even if sudden load
changes or internal control problems arise in the inverter.
Double
Conversion On-Line UPS systems also exhibit transfer time, but in different
conditions, which is quite different from standby and line-interactive UPS.
Where a
Standby and Line Interactive UPS displays a transfer time when a blackout
occurs, a double-conversion on-line UPS exhibits a transfer time when there is
a large load step or inrush current.
Both the
battery charger and inverter convert the entire load power that flows in the
design, which increases the reduced efficiency and heat generation.
The Delta
Conversion On-Line UPS
The design
of Delta Conversion On-Line UPS is a new technology that has been introduced
specifically to overcome the drawback of the Double Conversion On-Line design
and is available in the range of 5kVA to 1 MW.
Similar to
the Double Conversion On-Line design, the Delta Conversion On-Line UPS also
always has an inverter that supplies the load voltage. But here additional
Delta Converter contributes power to the inverter output.
But when
such conditions such as AC failure or disturbances, this design exhibit
behavior like double conversion on-line.
If you
explain to me in an easy way, the most attention is given to energy efficiency
in this UPS.
If this
happens then the transfer switch will have to be operated and the load will
have to be switched on above the battery / inverter backup. This inverter will
start only when the power fails, hence its name "Standby."
The Line
Interactive
The main
purpose of a conversion technology is to save this energy.
To do this,
they carry energy only in the difference (delta) of the starting and ending
points. The Double Conversion On-Line UPS converts the power of the battery and
then also reverse, while the components of the power in the Delta Converter
move from input to output.
Type
Benefits Limitations Our’s Findings
Best value
for standby low cost high efficiency compact uses battery during brownouts
impractical over 2kVA personal workstations
Line
Interactive High reliability High efficiency Good voltage conditioning
Impractical over 5kVA These are very popular UPS type in existence because of
its high reliability ideal for rack or distributed servers and harsh power
environments.
Standby
On-Line Hybrid Excellent voltage conditioning Low-efficiency Low-reliability
High cost Impractical over 5kVA Line Interactive provides better reliability
and similar conditioning in better value
Standby Free
Excellent voltage Conditioning High reliability Low efficiency unstable in
combination with some loads and generators is its limited application as these
are low-efficiency and instability issues and N + 1 On-Line design offers even
better reliability
Double
Conversion On-Line Excellent voltage conditioning ease of paralleling low
efficiency Expensive under 5kVA Well suited for N + 1 designs
Delta
Conversion On-Line Excellent voltage conditioning High efficiency Impractical
under 5kVA High efficiency It reduces the substantial life-cycle cost in large
installations
What is the
difference between UPS and Inverter
By the way,
there is a lot of difference between UPS and Inverter, so I have explained the
difference between the two in detail for your understanding.
Technically,
what is the difference between these two Uninterruptible power supply (UPS)
where it provides continuous power supply when power is cut. At the same time,
the inverter circuit only converts the battery's DC current to AC and supplies
it.
Practically,
what is the difference between these two
So let's
know how these two are practically different: -
1. UPS: Uninterruptible power supply (UPS)
gives us power when power is cut. It is mainly used in desktop computers
according to backup.
2. Inverter: This is a power backup solution. Its
total unit consists of three components the charges (which provide electricity
to your home), battery and inverter circuit that converts DC battery current
into electricity. It is mainly used to supply backup power to the entire house.
3. UPS is
mainly used according to the backup of the system. If you connect your desktop
computer to it then if there is any power loss then the backup power starts in
just 1 microsecond.
4. Inverter
is not suitable for computer backup because it has a delay in switching. Due to
which computer crash can occur, there is a risk of data loss. Apart from this,
it also poses a threat to the motherboard and hard disk.
5. UPS can
provide backup for only 10 to 20 minutes. Because its main intention is to
provide small time backup so that it can save programs and data. At the same
time, the purpose of inverters is to provide power backup to the entire house.
6. Inverter
uses flat plate and tubular battery to store electricity. This requires
continuous maintenance such as filling distilled water at regular intervals.
Feature UPS
Inverter
Where Used
Desktop Computer provides backup to other home appliances such as TV Fans
lights.
How long
does it take to switch Negligible Microsecond
Backup time
10 to 20 minutes 3 to 4 hours depends on the battery
Maintenance has
to be watered periodically.
Price from
2000 to 6000 10000 to 40000
What are
the benefits of UPS:
-
Maintenance of Power - The first and special benefit of UPS is that it controls
the power flowing in your computer.
- Continuity
of Operation - In this, it is a special thing that it keeps working
continuously, which means that even after the power is cut, it keeps doing it
continuously and provides power backup.
- Surge
Protection - This protects your computer from all kinds of losses from current
fluctuation. For this, it controls the power coming into the computer.
- Line
Interactive UPS - It flows a balanced controlled power to your computer and
even after the current is gone, it gives you so much time that you can save
your work. There is no loss of data and device.
- Emergency
Power Source: - UPS acts like a very good power source in times of emergency.
When Main Power is off, you can use your home power using UPS / inverter.
That's why UPS is a great emergency power source.
- No Data
Loss: - Due to unexpected computer shut down, there are all the chances of data
loss of the computer. When the UPS is done, the fear of that disappears if the
power is gone.
So there
will be data loss. After the UPS light is gone, power supplies easily for some
time so that you can easily save your data and Shut Down the computer.
What are
the disadvantages of UPS:
- Start Up
Cost - If you want to use Standby UPS, then it is very expensive for you. This
means that the installation cost of UPS is slightly higher in the beginning.
-
Infrastructure - UPS is used according to infrastructure. Therefore, the larger
the infrastructure, the larger and more battery is used.
-
Maintenance Cost - The UPS battery does not work for a long time and after some
time it deteriorates, after which you have to completely replace its old
battery and use a new battery. With this, this battery also needs maintenance
from time to time.
Conclusion
Like we have
known that there are many types of UPS and they also have different
applications. Hence there is no type of single UPS type which is ideal for all
applications.
Therefore,
it is very important to know about different types of UPS and their
application. Only then can we choose the right UPS for ourselves. Compared to
the loss of UPS, its benefits are very high, which makes it special. According
to the alternative source of power, UPS is a very good option.
I sincerely
hope that I have asked you what is UPS (What is UPS)? Gave full information
about and I hope you guys have understood about UPS.
I request
all of you readers that you too should share this information in your
neighborhood, relatives and friends, so that we will have awareness among us
and everyone will benefit a lot from it. I need your support so that I can
convey more new information to you.
It has
always been my endeavor that I always help my readers or readers from all
sides, if you people have any doubt of any kind, then you can ask me
irresponsibly. I will definitely try to solve those Doubts.
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