Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
SURGE ARRESTERS AND SURGE SUPPRESSORS
IN TRANSFORMER
Guided by:-
Er. SMRUTI PRAGYAN DALAI &
Er. UMESH CHANDRA MISHRA
Submi...
CONTENT
1) Introduction
2) Transformer
3) Lightning
4) Surge arresters in transformer
5) Types of surge arresters
6) How d...
INTRODUCTION
SURGE ARRESTER:
 A device used on power system in high voltage, to protect
electrical equipments from lightn...
Transformer
As we all know that, “a transformer is a
static device which transfer electrical energy
from one circuit to a...
Lightning
Lightning is a sudden electro static discharge
between two clouds during storm.
When lightning strike transmis...
This high voltage causes failure in the insulation
capacity of transformer .
Which result in the bursting of transformer...
Surge arrester in transformer
 It protect transformer
from lightning and
switching surges.
 It is also called Surge
Prot...
Types of arresters
Low-voltage surge arrester
Distribution arrester
DC or blowing valve-type arrester
Neutral protecti...
How do surge arresters protect transformer or
power system
11000 Volts
230 Volts
Typically
11000 Volts
230 Volts
Typically
11000 Volts
230 Volts
Surge arrester
Typically
11000 Volts
230 Volts
Surge arrester
What exactly does a surge
arrester do?
It does not absorb the lightning.
It does not stop the lightning.
It divert the ...
At the Heart of all Arresters is the Metal
Oxide Varistor (MOV)
The MOV Disk is a semiconductor
that is sensitive to volt...
The Metal Oxide Varistor (MOV) is a very fast acting
electronic switch.
It is an open switch to standard system AC volta...
Advantage of surge arrester in transformer
The surge arrester protects the transformer.
The surge arrester alerts operat...
Disadvantage of surge arrester
Conducting surge arrester blow fuses.
Surge arrester has no live line capabilities.
Unsa...
Surge suppressors in transformer
Surge suppressor (surge protector) is a device to
protect electrical devices from surge ...
How does surge suppressor
protect?
Blocking unwanted voltage or current.
Shorting to the ground.
What is surge voltage?
High amplitude
Short duration over voltage.
Reference:-
Sites:-
 www.electrical4u.com
 www.thefreedictionary.com
 www.wikipedia.com
Books
V Kamaraju(High Voltage E...
Surge arrester and surge suppressor on transformer
Upcoming SlideShare
Loading in …5
×

Surge arrester and surge suppressor on transformer

4,223 views

Published on

PPT

Published in: Engineering
  • Be the first to comment

Surge arrester and surge suppressor on transformer

  1. 1. SURGE ARRESTERS AND SURGE SUPPRESSORS IN TRANSFORMER Guided by:- Er. SMRUTI PRAGYAN DALAI & Er. UMESH CHANDRA MISHRA Submitted by:- Vikas Kumar Manjhi Branch:-Electrical Reg. No:-1201214203 Sec:-B
  2. 2. CONTENT 1) Introduction 2) Transformer 3) Lightning 4) Surge arresters in transformer 5) Types of surge arresters 6) How do surge arrester protect transformer 7) What exactly does a surge arrester do? 8) Advantage and disadvantage of surge arrester 9) Surge suppressor in transformer 10) How does surge suppressor protect
  3. 3. INTRODUCTION SURGE ARRESTER:  A device used on power system in high voltage, to protect electrical equipments from lightning and switching surge .  It is a surge diverter. SURGE SUPPRESSOR:  This is also a surge diverter but generally used in low voltage equipments.  It is generally used in electronics equipment. This paper presents information about the characteristic and design of arresters and suppressors. In addition to applications, it also provides information about the protection of transformer.
  4. 4. Transformer As we all know that, “a transformer is a static device which transfer electrical energy from one circuit to another without change in frequency’’. Transformer are very important and costly apparatus in power system. Factor that can damage transformer 1) Lightning 2) Power frequency
  5. 5. Lightning Lightning is a sudden electro static discharge between two clouds during storm. When lightning strike transmission line then a very high voltage generated with in it.
  6. 6. This high voltage causes failure in the insulation capacity of transformer . Which result in the bursting of transformer or other electrical device. We can protect the transformer from lightning by using 1. surge arrester 2. surge suppressor .
  7. 7. Surge arrester in transformer  It protect transformer from lightning and switching surges.  It is also called Surge Protection Device(SPD).  It is also used in power transmission and distribution system.
  8. 8. Types of arresters Low-voltage surge arrester Distribution arrester DC or blowing valve-type arrester Neutral protection arrester  Magnetic blow valve station arrester
  9. 9. How do surge arresters protect transformer or power system 11000 Volts 230 Volts
  10. 10. Typically 11000 Volts 230 Volts
  11. 11. Typically 11000 Volts 230 Volts Surge arrester
  12. 12. Typically 11000 Volts 230 Volts Surge arrester
  13. 13. What exactly does a surge arrester do? It does not absorb the lightning. It does not stop the lightning. It divert the lightning to ground. It limit the voltage produced by lightning. It only protects equipment electrically in parallel with it.
  14. 14. At the Heart of all Arresters is the Metal Oxide Varistor (MOV) The MOV Disk is a semiconductor that is sensitive to voltage . At normal voltage the MOV Disk is an insulator and will not conduct current. But at higher voltage caused by lightning it becomes a conductor.
  15. 15. The Metal Oxide Varistor (MOV) is a very fast acting electronic switch. It is an open switch to standard system AC voltage and a closed switch to Lightning voltages.
  16. 16. Advantage of surge arrester in transformer The surge arrester protects the transformer. The surge arrester alerts operator, when it is damaged. The surge arrester can be changed live line. A healthy arrester is present at all times.
  17. 17. Disadvantage of surge arrester Conducting surge arrester blow fuses. Surge arrester has no live line capabilities. Unsafe maintenance of surge arrester.
  18. 18. Surge suppressors in transformer Surge suppressor (surge protector) is a device to protect electrical devices from surge voltage. It is also known as transient voltage surge suppressor (TVSS). This is also a surge diverter but used in low voltage equipments.  It is generally used in electronics equipment
  19. 19. How does surge suppressor protect? Blocking unwanted voltage or current. Shorting to the ground.
  20. 20. What is surge voltage? High amplitude Short duration over voltage.
  21. 21. Reference:- Sites:-  www.electrical4u.com  www.thefreedictionary.com  www.wikipedia.com Books V Kamaraju(High Voltage Engineering)

×