SURGE
SUPPRESSOR
Submitted by
PRATYASHA PATRA
ELECTRICAL ENGINEERING
COLLEGE OF ENGINEERING &
TECHNOLOGY
Under The Guidanc...
SURGE
 Power

Surge or transient voltage, is an increase in
voltage significantly above the designated level in a flow
of...
 It

is the low intensity surge
twice the nominal line
voltage and relatively long
in duration ,about one
millisecond.
 ...
SURGE SOURCES
Lightning
Operation

of high power electrical

devices
Faulty wiring
Problem with equipment
Potential e...
Surge Suppressor




Surge suppressor is a device inserted in alternating current(AC)
utility lines which typically used...
.Need for surge suppressor
The electronic equipment containing
transistor ,integrated circuit are vulnerable to
damage by ...
The Process of Protection
A

standard surge protection passes the
electrical current along from the outlet to a
number of...
MOV forms a connection
between hot power line
grounding line
MOV has three parts: a piece
of metal oxide material in the
m...
Working of MOV
These semiconductors have a variable resistance that is dependent
on voltage. When voltage is below a certa...
Surge connection
A

series connected surge suppressor

It act as a roadblock. The surge must travel through the suppresso...
Installation Location







A series connected surge suppressor must be located between the
source and our computer ....
Advance Surge Suppressor
Voltage

Signal Surge
Suppressor
AC Surge Suppressor
Voltage Signal Surge
Protectors
Description:
These are a line of transient
surge protection devices used
in one way unipol...
Working
It has a line side which is connected to the transmission wire and a protected side
which is connected to the sens...
Features
 Tight

clamping voltage
 High surge current handling capability
 Low series resistance
 Very high resistance...
AC Surge Suppressor
 Description:

These are a line of transient
surge protection devices
used in single phase AC
supply ...
Working
It has a line side which is connected to the AC supply LIVE and NEUTRAL and a
protected side which is connected to...
Features
 Tight

clamping voltage
 High surge current handling capability
 Very high resistance during normal
operation...
Surge Suppressor Rating

Peak surge current
This represent the maximum transient current that the suppressor
can handle du...
Limitation

Continues conduction of the
varistor make it hot. At somewhere
lower power dissipation in the
varistor, the va...
Conclusion
Surge

suppressors should be used as a matter
of habit with all semiconductor based
electronic and computer ha...
Surge supressor
Upcoming SlideShare
Loading in...5
×

Surge supressor

412

Published on

Published in: Education
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
412
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
16
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Surge supressor

  1. 1. SURGE SUPPRESSOR Submitted by PRATYASHA PATRA ELECTRICAL ENGINEERING COLLEGE OF ENGINEERING & TECHNOLOGY Under The Guidance Of ABHIMANYU MOHAPATRA RANJAN KU. JENA
  2. 2. SURGE  Power Surge or transient voltage, is an increase in voltage significantly above the designated level in a flow of electricity.  These transients attack the equipment through power input lines, signal input and output lines, data lines and any other wire coming into or going out of electronic devices.
  3. 3.  It is the low intensity surge twice the nominal line voltage and relatively long in duration ,about one millisecond.  Damaging surges typically are shorter, measured in tens of nanoseconds, and much higher intensity, ten to twenty times larger than normal voltage.
  4. 4. SURGE SOURCES Lightning Operation of high power electrical devices Faulty wiring Problem with equipment Potential error in distribution system
  5. 5. Surge Suppressor   Surge suppressor is a device inserted in alternating current(AC) utility lines which typically used to protect electronic equipment from damage or destruction cause by transient voltage and surge current. A typical surge suppressor is a small box with several utility outlets, a power switch and a 3wire cord for plugging into a wall outlets.
  6. 6. .Need for surge suppressor The electronic equipment containing transistor ,integrated circuit are vulnerable to damage by transients over voltages on AC supply mains. In the absence of surge suppressor , the transient over voltage may have as high as 6kv .these pulses are of short duration and measured in microsecond ,can destroy transistor ,integrated circuit and sensitive component. 
  7. 7. The Process of Protection A standard surge protection passes the electrical current along from the outlet to a number of electrical and electronic devices plugged into the power strip. If the voltage from the outlet rises above the accepted level- the surge protector diverts the extra electricity into the outlet’s grounding wire. In the most common type of surge protector, a component called a metal oxide varistor, or MOV, diverts the extra voltage,
  8. 8. MOV forms a connection between hot power line grounding line MOV has three parts: a piece of metal oxide material in the middle, joined to the power and grounding line and two semiconductors .
  9. 9. Working of MOV These semiconductors have a variable resistance that is dependent on voltage. When voltage is below a certain level, the electrons in the semiconductors flow in such a way as to create a very high resitance.When the voltage exceeds that level, the electrons behave differently creating a much low resistance. When the voltage is correct, an MOV does nothing. When voltage is too high an MOV can conduct a lot of current to eliminate the extra voltage. As soon as current is diverted into the MOV and to ground, the voltage in the hot line returns to a normal level, so the MOV’s resistance shoots of again. In this way, the MOV only diverts the surge current while allowing the standard current to continue powering the machines connected to the surge protector.
  10. 10. Surge connection A series connected surge suppressor It act as a roadblock. The surge must travel through the suppressor on its way to our equipment. The suppressor removes or smoothes out the surge on its way. So no voltage are left to harm our equipment. A parallel connected surge suppressor It is connected in parallel to the computer across the leads of the power line just as the computer. The surge suppressor works by shorting out the surge, routing its high voltage direct from hot to neutral , before the surge voltage on the power line rises to a point at which can damage our computer.
  11. 11. Installation Location     A series connected surge suppressor must be located between the source and our computer . A parallel connected surge suppressor could be located any where in an electrical circuit as long as it can provide a lower resistance path to ground than the circuit of our computer’s power supply. Most common surge suppressor takes the form of outlet strips function ay the device level or at the point of use as described in industry. They are meant to protect only a single device or few devices. Whole premises or whole house surge is install in our fuse box or breaker panel. It has the advantage that they protect everything in our office and home against external surges.
  12. 12. Advance Surge Suppressor Voltage Signal Surge Suppressor AC Surge Suppressor
  13. 13. Voltage Signal Surge Protectors Description: These are a line of transient surge protection devices used in one way unipolar (bipolar) systems.  It requires a remotely located transducer. This result in transmission wire being connected between the transducer and data acquisition system, acting as a signal carrier as well as the transient voltage and surge current carrier.
  14. 14. Working It has a line side which is connected to the transmission wire and a protected side which is connected to the sensitive equipment.  It provides three stage of protection for signal path.  Stage 1: The input of the module includes an inductor which slows down rise time of the transient and provides an impedance mismatch resulting in some of the transient energy being reflected back down the supply lines. Stage 2: In this stage tight voltage clamping is provided. Stage 3: In this stage protection is provided by MOV which suppress large surge current and clamp the larger spikes. All destructive voltages and currents are absorbed into an earth connection.
  15. 15. Features  Tight clamping voltage  High surge current handling capability  Low series resistance  Very high resistance during normal operation  100% redundancy
  16. 16. AC Surge Suppressor  Description: These are a line of transient surge protection devices used in single phase AC supply voltage application. These devices are design to provide protection for electronic equipment requiring connection to an AC supply.
  17. 17. Working It has a line side which is connected to the AC supply LIVE and NEUTRAL and a protected side which is connected to the sensitive equipment.  It provides three stage of protection for signal path.  Stage 1: The input of the module includes an inductor which slows down rise time of the transient and provides an impedance mismatch resulting in some of the transient energy being reflected back down the supply lines. Stage 2: In this stage protection is provided by MOV and a thermal fuse. The MOV suppresses large surge current and clamps voltage spikes that just above the maximum supply tolerance level. Once the MOV reaches the end of its useful life, the thermal fuse blow, the MOV will removed from the circuit, and the green LED will be extinguished. This MOV accounts for appx 12% of surge protectors total protection capacity Stage 3: In this stage protection is provides the remaining 88% of protection capacity in the form of an arrays of MOVs.The LIVE and NEUTRAL are protected individually as well as differential mode.
  18. 18. Features  Tight clamping voltage  High surge current handling capability  Very high resistance during normal operation  LED indicator ensures continued protection  100% redundancy
  19. 19. Surge Suppressor Rating Peak surge current This represent the maximum transient current that the suppressor can handle during a surge.  Joule rating It is a measurement of energy absorption capability of the surge processor  Response time It tells at what time delay they respond to the power surge.   Clamping voltage It tells what voltage will cause the MOVs to conduct electricity to the ground line.
  20. 20. Limitation Continues conduction of the varistor make it hot. At somewhere lower power dissipation in the varistor, the varistor may become hot enough to melt plastics in the vicinity of the varistor.In some cases flammable plastic might be ignited by hot varistor.
  21. 21. Conclusion Surge suppressors should be used as a matter of habit with all semiconductor based electronic and computer hardware including peripherals such as printers monitors, external disk drivers and others. But it can’t be relied upon to provide protection against lightning induced transients. So the safest procedure to ensure that all susceptible hardware is to unplug the suppressor main power cord during lightning.
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×