SlideShare a Scribd company logo
1 of 13
TESTING OF SURGE DIVERTERS
Contents
• Introduction
• Power Frequency Spark over Test
• Hundred per cent Standard Impulse Spark over
Test
• Front of Wave Spark over Test
• Residual Voltage Test
• High Current Impulse Test on Surge Diverters
• Other Tests
• Conclusion and Reference
1Prepared By S ARUN M.Tech Testing of Surge Diverters
Introduction
• In modern practices, surge diverters or lightning
arresters are the most reliable apparatus to project the
power system against transient voltages due to
lightning and switching surges.
• They are invariably used from distribution voltages
(400 V) to highest system transmission voltages of
765 kV or above.
• Hence, testing them precisely in standard laboratories
with standard test procedures are of great importance
in modern power system practice.
2Prepared By S ARUN M.Tech Testing of Surge Diverters
• A surge diverter has to be a non-conductor for
operating power frequency voltages.
• It should behave as a short circuit for transient
over voltages of impulse character, discharge
the heavy current, and recover its insulation
without allowing the follow-up of the power
frequency current.
3Prepared By S ARUN M.Tech Testing of Surge Diverters
Power Frequency Spark over Test
• This is routine test. The test is conducted using
a series resistance to limit the current in case
a spark over occurs.
• The arrester has to withstand at least 1.5
times the rated value of the voltage for five
successive applications.
• The test is generally done also under dry and
wet conditions.
4Prepared By S ARUN M.Tech Testing of Surge Diverters
Hundred per cent Standard Impulse
Spark over Test
• This test is conducted to ensure that the diverter
operates positively when over voltages of
impulse nature occur.
• The impulse generator is adjusted to give the
standard impulse voltage of a preset magnitude
specified in the specifications.
• The arrester has to spark over every time in each
of the ten successive applications. The test is
done with both positive and negative polarity
waveforms.
5Prepared By S ARUN M.Tech Testing of Surge Diverters
• Sometimes, the test is done by starting at a
voltage level that does not give flashover at
all, and is repeated in increasing steps of
voltage till hundred per cent flashover occurs.
• The magnitude of the voltage at which
hundred per cent flashover occurs is the
required spark over voltage.
6Prepared By S ARUN M.Tech Testing of Surge Diverters
Front of Wave Spark over Test
• In order to ensure that the surge diverter
flashes over for very steep fronted waves of
high peaks, this test is conducted using an
overvoltage having a rate of rise of 1OO kV/
ps, per 12 kV of the rating.
• The estimated maximum steepness of the
waves are specified in standards and
specifications.
7Prepared By S ARUN M.Tech Testing of Surge Diverters
• The test is done by conducting hundred
percent spark over voltage test for increasing
magnitudes of the standard impulse wave.
• The time to spark over is measured. The volt-
time characteristic of the diverter is plotted,
and the intersection of the V-I characteristic
and the line with slope of the virtual
steepness of the front gives the front of a
wave spark over voltage.
8Prepared By S ARUN M.Tech Testing of Surge Diverters
Residual Voltage Test
• This test is conducted on pro-rated diverters
of ratings in the range 3 to 12 kV only.
• The voltage developed across the Non-Linear
Resistor units (NLR) during the flow of surge
currents through the arrester is-called the
'residual voltage’.
• A pro-rated arrester is a complete, suitably
housed section of an arrester including series
gaps and non-linear series resistors in the
same proportion as in the complete arrester.
9Prepared By S ARUN M.Tech Testing of Surge Diverters
• Standard impulse currents of the rated
magnitudes are applied, and the voltage
developed across the diverter is recorded using a
suitable voltage divider and a CRO.
• The magnitudes of the currents are
approximately 0.5,1.0, and 2.0 times the rated
currents.
• From the oscillogram, a graph is drawn between
the current magnitudes and the voltage
developed across the diverter pro-rated unit.
• From the graph, the residual voltage
corresponding to the exact rated current is
obtained.
10Prepared By S ARUN M.Tech Testing of Surge Diverters
High Current Impulse Test on Surge
Diverters
• This test is also done on pro-rated diverter units in the
range of 3 to 12 kV.
• A high current impulse wave of 4/10μs of peak value
mentioned in the specifications is applied to a spare unit of
identical characteristics.
• To pass the test, if
(i) the power frequency spark over voltage before and
after the test does not differ by more than 10%,
(ii) the voltage and current waveforms of the diverter
do not differ significantly in the two applications, and
(iii) the non-linear resistance elements in the diverter
do not show any sign of puncture or external flashover.
11Prepared By S ARUN M.Tech Testing of Surge Diverters
Other Tests
• The other tests that are normally conducted
on surge diverters are
(i) mechanical tests like porosity test,
temperature cycle tests, and others,
(ii) pressure relief test,
(iii) the voltage withstand test on the
insulator housing of the diverter,
(iv) the switching surge flashover test, and
(v) the pollution tests.
12Prepared By S ARUN M.Tech Testing of Surge Diverters
• Conclusion
From these we conclude that know about
varies types of testing on surge diverter and
also its different ratings.
• Reference
“High voltage engineering ” by M S Naidu and
V Kamaraju, Tata McGraw Hill Education, 5th
edition.
13Prepared By S ARUN M.Tech Testing of Surge Diverters

More Related Content

What's hot

Protection and control of Microgrid
Protection and control of MicrogridProtection and control of Microgrid
Protection and control of MicrogridAmarjeet S Pandey
 
Unit 04 Protection of generators and transformers
Unit  04 Protection of generators and transformers Unit  04 Protection of generators and transformers
Unit 04 Protection of generators and transformers PremanandDesai
 
Measurement of high_voltage_and_high_currentunit_iv_full_version
Measurement of high_voltage_and_high_currentunit_iv_full_versionMeasurement of high_voltage_and_high_currentunit_iv_full_version
Measurement of high_voltage_and_high_currentunit_iv_full_versionAman Ansari
 
Transient in Power system
Transient in Power systemTransient in Power system
Transient in Power systemPreet_patel
 
Measurement of hvac (High Voltage Engineering )
Measurement  of  hvac (High Voltage Engineering )Measurement  of  hvac (High Voltage Engineering )
Measurement of hvac (High Voltage Engineering )Abhishek Choksi
 
Automatic Generation Control
Automatic Generation ControlAutomatic Generation Control
Automatic Generation ControlBirju Besra
 
Protection of transmission lines(encrypted)
Protection of transmission lines(encrypted)Protection of transmission lines(encrypted)
Protection of transmission lines(encrypted)Rohini Haridas
 
Capacitive voltage transformer (1)
Capacitive voltage transformer (1)Capacitive voltage transformer (1)
Capacitive voltage transformer (1)kaushal boghani
 
Power system stability
Power system stabilityPower system stability
Power system stabilityBalaram Das
 
Substation protection devices
Substation protection devicesSubstation protection devices
Substation protection devicesRahul Aman
 
GENERATING OF HIGH ALTERNATING VOLTAGE
GENERATING OF HIGH ALTERNATING VOLTAGEGENERATING OF HIGH ALTERNATING VOLTAGE
GENERATING OF HIGH ALTERNATING VOLTAGEJamil Abdullah
 
Automatic Power Factor Improvement.Pptx
Automatic Power Factor Improvement.PptxAutomatic Power Factor Improvement.Pptx
Automatic Power Factor Improvement.PptxSveris COE Pandharpur
 
Hv module 3 Impulse voltage generation
Hv module 3 Impulse voltage generationHv module 3 Impulse voltage generation
Hv module 3 Impulse voltage generationAsha Anu Kurian
 
Power System Stabilizer
Power System StabilizerPower System Stabilizer
Power System StabilizerSuman Sourabh
 
Protection & switchgear
Protection & switchgear   Protection & switchgear
Protection & switchgear johny renoald
 
Distribution System Voltage Drop and Power Loss Calculation
Distribution System Voltage Drop and Power Loss CalculationDistribution System Voltage Drop and Power Loss Calculation
Distribution System Voltage Drop and Power Loss CalculationAmeen San
 
Presentation on substations
Presentation on substationsPresentation on substations
Presentation on substationsvishalgohel12195
 

What's hot (20)

Protection and control of Microgrid
Protection and control of MicrogridProtection and control of Microgrid
Protection and control of Microgrid
 
Unit 04 Protection of generators and transformers
Unit  04 Protection of generators and transformers Unit  04 Protection of generators and transformers
Unit 04 Protection of generators and transformers
 
Measurement of high_voltage_and_high_currentunit_iv_full_version
Measurement of high_voltage_and_high_currentunit_iv_full_versionMeasurement of high_voltage_and_high_currentunit_iv_full_version
Measurement of high_voltage_and_high_currentunit_iv_full_version
 
Transient in Power system
Transient in Power systemTransient in Power system
Transient in Power system
 
Measurement of hvac (High Voltage Engineering )
Measurement  of  hvac (High Voltage Engineering )Measurement  of  hvac (High Voltage Engineering )
Measurement of hvac (High Voltage Engineering )
 
Relay testing procedure
Relay testing procedure Relay testing procedure
Relay testing procedure
 
MTDC SYSTEMS
MTDC SYSTEMSMTDC SYSTEMS
MTDC SYSTEMS
 
Automatic Generation Control
Automatic Generation ControlAutomatic Generation Control
Automatic Generation Control
 
Protection of transmission lines(encrypted)
Protection of transmission lines(encrypted)Protection of transmission lines(encrypted)
Protection of transmission lines(encrypted)
 
Capacitive voltage transformer (1)
Capacitive voltage transformer (1)Capacitive voltage transformer (1)
Capacitive voltage transformer (1)
 
Power system stability
Power system stabilityPower system stability
Power system stability
 
Substation protection devices
Substation protection devicesSubstation protection devices
Substation protection devices
 
Chapter 01- High Voltage Engineering Introduction
Chapter 01- High Voltage Engineering IntroductionChapter 01- High Voltage Engineering Introduction
Chapter 01- High Voltage Engineering Introduction
 
GENERATING OF HIGH ALTERNATING VOLTAGE
GENERATING OF HIGH ALTERNATING VOLTAGEGENERATING OF HIGH ALTERNATING VOLTAGE
GENERATING OF HIGH ALTERNATING VOLTAGE
 
Automatic Power Factor Improvement.Pptx
Automatic Power Factor Improvement.PptxAutomatic Power Factor Improvement.Pptx
Automatic Power Factor Improvement.Pptx
 
Hv module 3 Impulse voltage generation
Hv module 3 Impulse voltage generationHv module 3 Impulse voltage generation
Hv module 3 Impulse voltage generation
 
Power System Stabilizer
Power System StabilizerPower System Stabilizer
Power System Stabilizer
 
Protection & switchgear
Protection & switchgear   Protection & switchgear
Protection & switchgear
 
Distribution System Voltage Drop and Power Loss Calculation
Distribution System Voltage Drop and Power Loss CalculationDistribution System Voltage Drop and Power Loss Calculation
Distribution System Voltage Drop and Power Loss Calculation
 
Presentation on substations
Presentation on substationsPresentation on substations
Presentation on substations
 

Similar to Surge diverter

HIGH VOL TAGE TESTING OF TRANSFORMER BY HARI SHANKAR SINGH
HIGH VOL TAGE TESTING OF TRANSFORMER BY HARI SHANKAR SINGHHIGH VOL TAGE TESTING OF TRANSFORMER BY HARI SHANKAR SINGH
HIGH VOL TAGE TESTING OF TRANSFORMER BY HARI SHANKAR SINGHShankar Singh
 
Isolator and bushing
Isolator and bushingIsolator and bushing
Isolator and bushingNovia Putri
 
'docslide.us_hv-testing.ppt
'docslide.us_hv-testing.ppt'docslide.us_hv-testing.ppt
'docslide.us_hv-testing.pptThien Phan Bản
 
Installation, Testing and Troubleshooting of Transformers
Installation, Testing and Troubleshooting of TransformersInstallation, Testing and Troubleshooting of Transformers
Installation, Testing and Troubleshooting of TransformersLiving Online
 
Relay testing.............................
Relay testing.............................Relay testing.............................
Relay testing.............................hiiarindam
 
Distribution Transformer testing, West Bengal, India
Distribution Transformer testing,  West Bengal, IndiaDistribution Transformer testing,  West Bengal, India
Distribution Transformer testing, West Bengal, IndiaRajuMondal18
 
HVE UNIT V HIGH VOLTAGES TESTING AND INSULATION COORDINATION.pptx
HVE UNIT V HIGH VOLTAGES TESTING AND INSULATION COORDINATION.pptxHVE UNIT V HIGH VOLTAGES TESTING AND INSULATION COORDINATION.pptx
HVE UNIT V HIGH VOLTAGES TESTING AND INSULATION COORDINATION.pptxMuthuKumar158260
 
TESTING,MAINTENANCE&PROTECTION.ppt
TESTING,MAINTENANCE&PROTECTION.pptTESTING,MAINTENANCE&PROTECTION.ppt
TESTING,MAINTENANCE&PROTECTION.pptChristinaBoyd12
 
93518813-TESTING-MAINTENANCE-PROTECTION-OF-DISTRIBUTION-TRANSFORMERS.ppt
93518813-TESTING-MAINTENANCE-PROTECTION-OF-DISTRIBUTION-TRANSFORMERS.ppt93518813-TESTING-MAINTENANCE-PROTECTION-OF-DISTRIBUTION-TRANSFORMERS.ppt
93518813-TESTING-MAINTENANCE-PROTECTION-OF-DISTRIBUTION-TRANSFORMERS.pptsantubanga333
 
TESTING,MAINTENANCE&PROTECTION.ppt
TESTING,MAINTENANCE&PROTECTION.pptTESTING,MAINTENANCE&PROTECTION.ppt
TESTING,MAINTENANCE&PROTECTION.pptssuser1f60f6
 
Testing of transformer.pptx
Testing of transformer.pptxTesting of transformer.pptx
Testing of transformer.pptxNoorulAmin67
 
Frequency response analysis (FRA) of transformer
Frequency response analysis (FRA) of transformerFrequency response analysis (FRA) of transformer
Frequency response analysis (FRA) of transformerRaveendranath Macherla
 
Testing,maintenance&protection
Testing,maintenance&protectionTesting,maintenance&protection
Testing,maintenance&protectionRakesh Joshi
 
Testing of Circuit Breakers.pptx
Testing of Circuit Breakers.pptxTesting of Circuit Breakers.pptx
Testing of Circuit Breakers.pptxTafhim Bin Nasir
 
Presentation OutDoorSwithGear(AIS) .pptx
Presentation OutDoorSwithGear(AIS) .pptxPresentation OutDoorSwithGear(AIS) .pptx
Presentation OutDoorSwithGear(AIS) .pptxRAJKIRANR3
 
REPORT -VALLUR THERMAL POWER PLANT
REPORT -VALLUR THERMAL POWER PLANTREPORT -VALLUR THERMAL POWER PLANT
REPORT -VALLUR THERMAL POWER PLANTRAJPRASAD RS
 

Similar to Surge diverter (20)

HIGH VOL TAGE TESTING OF TRANSFORMER BY HARI SHANKAR SINGH
HIGH VOL TAGE TESTING OF TRANSFORMER BY HARI SHANKAR SINGHHIGH VOL TAGE TESTING OF TRANSFORMER BY HARI SHANKAR SINGH
HIGH VOL TAGE TESTING OF TRANSFORMER BY HARI SHANKAR SINGH
 
Isolator and bushing
Isolator and bushingIsolator and bushing
Isolator and bushing
 
Module 6part1
Module 6part1Module 6part1
Module 6part1
 
'docslide.us_hv-testing.ppt
'docslide.us_hv-testing.ppt'docslide.us_hv-testing.ppt
'docslide.us_hv-testing.ppt
 
Installation, Testing and Troubleshooting of Transformers
Installation, Testing and Troubleshooting of TransformersInstallation, Testing and Troubleshooting of Transformers
Installation, Testing and Troubleshooting of Transformers
 
Relay testing.............................
Relay testing.............................Relay testing.............................
Relay testing.............................
 
Distribution Transformer testing, West Bengal, India
Distribution Transformer testing,  West Bengal, IndiaDistribution Transformer testing,  West Bengal, India
Distribution Transformer testing, West Bengal, India
 
HVE UNIT V HIGH VOLTAGES TESTING AND INSULATION COORDINATION.pptx
HVE UNIT V HIGH VOLTAGES TESTING AND INSULATION COORDINATION.pptxHVE UNIT V HIGH VOLTAGES TESTING AND INSULATION COORDINATION.pptx
HVE UNIT V HIGH VOLTAGES TESTING AND INSULATION COORDINATION.pptx
 
16950
1695016950
16950
 
TESTING,MAINTENANCE&PROTECTION.ppt
TESTING,MAINTENANCE&PROTECTION.pptTESTING,MAINTENANCE&PROTECTION.ppt
TESTING,MAINTENANCE&PROTECTION.ppt
 
93518813-TESTING-MAINTENANCE-PROTECTION-OF-DISTRIBUTION-TRANSFORMERS.ppt
93518813-TESTING-MAINTENANCE-PROTECTION-OF-DISTRIBUTION-TRANSFORMERS.ppt93518813-TESTING-MAINTENANCE-PROTECTION-OF-DISTRIBUTION-TRANSFORMERS.ppt
93518813-TESTING-MAINTENANCE-PROTECTION-OF-DISTRIBUTION-TRANSFORMERS.ppt
 
TESTING,MAINTENANCE&PROTECTION.ppt
TESTING,MAINTENANCE&PROTECTION.pptTESTING,MAINTENANCE&PROTECTION.ppt
TESTING,MAINTENANCE&PROTECTION.ppt
 
Testing of transformer.pptx
Testing of transformer.pptxTesting of transformer.pptx
Testing of transformer.pptx
 
ET 5 LESSON 2 TEST EQUIPMENT.pptx
ET 5 LESSON 2 TEST EQUIPMENT.pptxET 5 LESSON 2 TEST EQUIPMENT.pptx
ET 5 LESSON 2 TEST EQUIPMENT.pptx
 
Frequency response analysis (FRA) of transformer
Frequency response analysis (FRA) of transformerFrequency response analysis (FRA) of transformer
Frequency response analysis (FRA) of transformer
 
High potential test
High potential testHigh potential test
High potential test
 
Testing,maintenance&protection
Testing,maintenance&protectionTesting,maintenance&protection
Testing,maintenance&protection
 
Testing of Circuit Breakers.pptx
Testing of Circuit Breakers.pptxTesting of Circuit Breakers.pptx
Testing of Circuit Breakers.pptx
 
Presentation OutDoorSwithGear(AIS) .pptx
Presentation OutDoorSwithGear(AIS) .pptxPresentation OutDoorSwithGear(AIS) .pptx
Presentation OutDoorSwithGear(AIS) .pptx
 
REPORT -VALLUR THERMAL POWER PLANT
REPORT -VALLUR THERMAL POWER PLANTREPORT -VALLUR THERMAL POWER PLANT
REPORT -VALLUR THERMAL POWER PLANT
 

More from sarunkutti

More from sarunkutti (20)

Multi stage amp
Multi stage ampMulti stage amp
Multi stage amp
 
Differential amplifier
Differential amplifierDifferential amplifier
Differential amplifier
 
Oscillator
OscillatorOscillator
Oscillator
 
Fb amplifier (2)
Fb amplifier (2)Fb amplifier (2)
Fb amplifier (2)
 
Load line analysis
Load line analysisLoad line analysis
Load line analysis
 
Biasing
BiasingBiasing
Biasing
 
Mosfet
MosfetMosfet
Mosfet
 
Bjt
BjtBjt
Bjt
 
Lcd
LcdLcd
Lcd
 
Clipper and clamper
Clipper and clamperClipper and clamper
Clipper and clamper
 
Insulator
InsulatorInsulator
Insulator
 
Insulation coordination
Insulation coordinationInsulation coordination
Insulation coordination
 
Circuit breaker
Circuit breakerCircuit breaker
Circuit breaker
 
Impulse voltage
Impulse voltageImpulse voltage
Impulse voltage
 
Impulse current
Impulse currentImpulse current
Impulse current
 
Dc voltage
Dc voltageDc voltage
Dc voltage
 
Ac voltage
Ac voltageAc voltage
Ac voltage
 
Ac voltage
Ac voltageAc voltage
Ac voltage
 
Triggatron gap
Triggatron gapTriggatron gap
Triggatron gap
 
Ac impulse voltage
Ac impulse voltageAc impulse voltage
Ac impulse voltage
 

Recently uploaded

A brief look at visionOS - How to develop app on Apple's Vision Pro
A brief look at visionOS - How to develop app on Apple's Vision ProA brief look at visionOS - How to develop app on Apple's Vision Pro
A brief look at visionOS - How to develop app on Apple's Vision ProRay Yuan Liu
 
11. Properties of Liquid Fuels in Energy Engineering.pdf
11. Properties of Liquid Fuels in Energy Engineering.pdf11. Properties of Liquid Fuels in Energy Engineering.pdf
11. Properties of Liquid Fuels in Energy Engineering.pdfHafizMudaserAhmad
 
US Department of Education FAFSA Week of Action
US Department of Education FAFSA Week of ActionUS Department of Education FAFSA Week of Action
US Department of Education FAFSA Week of ActionMebane Rash
 
Python Programming for basic beginners.pptx
Python Programming for basic beginners.pptxPython Programming for basic beginners.pptx
Python Programming for basic beginners.pptxmohitesoham12
 
CS 3251 Programming in c all unit notes pdf
CS 3251 Programming in c all unit notes pdfCS 3251 Programming in c all unit notes pdf
CS 3251 Programming in c all unit notes pdfBalamuruganV28
 
Input Output Management in Operating System
Input Output Management in Operating SystemInput Output Management in Operating System
Input Output Management in Operating SystemRashmi Bhat
 
Prach: A Feature-Rich Platform Empowering the Autism Community
Prach: A Feature-Rich Platform Empowering the Autism CommunityPrach: A Feature-Rich Platform Empowering the Autism Community
Prach: A Feature-Rich Platform Empowering the Autism Communityprachaibot
 
Robotics-Asimov's Laws, Mechanical Subsystems, Robot Kinematics, Robot Dynami...
Robotics-Asimov's Laws, Mechanical Subsystems, Robot Kinematics, Robot Dynami...Robotics-Asimov's Laws, Mechanical Subsystems, Robot Kinematics, Robot Dynami...
Robotics-Asimov's Laws, Mechanical Subsystems, Robot Kinematics, Robot Dynami...Sumanth A
 
Virtual memory management in Operating System
Virtual memory management in Operating SystemVirtual memory management in Operating System
Virtual memory management in Operating SystemRashmi Bhat
 
Stork Webinar | APM Transformational planning, Tool Selection & Performance T...
Stork Webinar | APM Transformational planning, Tool Selection & Performance T...Stork Webinar | APM Transformational planning, Tool Selection & Performance T...
Stork Webinar | APM Transformational planning, Tool Selection & Performance T...Stork
 
DEVICE DRIVERS AND INTERRUPTS SERVICE MECHANISM.pdf
DEVICE DRIVERS AND INTERRUPTS  SERVICE MECHANISM.pdfDEVICE DRIVERS AND INTERRUPTS  SERVICE MECHANISM.pdf
DEVICE DRIVERS AND INTERRUPTS SERVICE MECHANISM.pdfAkritiPradhan2
 
Triangulation survey (Basic Mine Surveying)_MI10412MI.pptx
Triangulation survey (Basic Mine Surveying)_MI10412MI.pptxTriangulation survey (Basic Mine Surveying)_MI10412MI.pptx
Triangulation survey (Basic Mine Surveying)_MI10412MI.pptxRomil Mishra
 
『澳洲文凭』买麦考瑞大学毕业证书成绩单办理澳洲Macquarie文凭学位证书
『澳洲文凭』买麦考瑞大学毕业证书成绩单办理澳洲Macquarie文凭学位证书『澳洲文凭』买麦考瑞大学毕业证书成绩单办理澳洲Macquarie文凭学位证书
『澳洲文凭』买麦考瑞大学毕业证书成绩单办理澳洲Macquarie文凭学位证书rnrncn29
 
Main Memory Management in Operating System
Main Memory Management in Operating SystemMain Memory Management in Operating System
Main Memory Management in Operating SystemRashmi Bhat
 
TEST CASE GENERATION GENERATION BLOCK BOX APPROACH
TEST CASE GENERATION GENERATION BLOCK BOX APPROACHTEST CASE GENERATION GENERATION BLOCK BOX APPROACH
TEST CASE GENERATION GENERATION BLOCK BOX APPROACHSneha Padhiar
 
Mine Environment II Lab_MI10448MI__________.pptx
Mine Environment II Lab_MI10448MI__________.pptxMine Environment II Lab_MI10448MI__________.pptx
Mine Environment II Lab_MI10448MI__________.pptxRomil Mishra
 
Energy Awareness training ppt for manufacturing process.pptx
Energy Awareness training ppt for manufacturing process.pptxEnergy Awareness training ppt for manufacturing process.pptx
Energy Awareness training ppt for manufacturing process.pptxsiddharthjain2303
 
70 POWER PLANT IAE V2500 technical training
70 POWER PLANT IAE V2500 technical training70 POWER PLANT IAE V2500 technical training
70 POWER PLANT IAE V2500 technical trainingGladiatorsKasper
 
KCD Costa Rica 2024 - Nephio para parvulitos
KCD Costa Rica 2024 - Nephio para parvulitosKCD Costa Rica 2024 - Nephio para parvulitos
KCD Costa Rica 2024 - Nephio para parvulitosVictor Morales
 
SOFTWARE ESTIMATION COCOMO AND FP CALCULATION
SOFTWARE ESTIMATION COCOMO AND FP CALCULATIONSOFTWARE ESTIMATION COCOMO AND FP CALCULATION
SOFTWARE ESTIMATION COCOMO AND FP CALCULATIONSneha Padhiar
 

Recently uploaded (20)

A brief look at visionOS - How to develop app on Apple's Vision Pro
A brief look at visionOS - How to develop app on Apple's Vision ProA brief look at visionOS - How to develop app on Apple's Vision Pro
A brief look at visionOS - How to develop app on Apple's Vision Pro
 
11. Properties of Liquid Fuels in Energy Engineering.pdf
11. Properties of Liquid Fuels in Energy Engineering.pdf11. Properties of Liquid Fuels in Energy Engineering.pdf
11. Properties of Liquid Fuels in Energy Engineering.pdf
 
US Department of Education FAFSA Week of Action
US Department of Education FAFSA Week of ActionUS Department of Education FAFSA Week of Action
US Department of Education FAFSA Week of Action
 
Python Programming for basic beginners.pptx
Python Programming for basic beginners.pptxPython Programming for basic beginners.pptx
Python Programming for basic beginners.pptx
 
CS 3251 Programming in c all unit notes pdf
CS 3251 Programming in c all unit notes pdfCS 3251 Programming in c all unit notes pdf
CS 3251 Programming in c all unit notes pdf
 
Input Output Management in Operating System
Input Output Management in Operating SystemInput Output Management in Operating System
Input Output Management in Operating System
 
Prach: A Feature-Rich Platform Empowering the Autism Community
Prach: A Feature-Rich Platform Empowering the Autism CommunityPrach: A Feature-Rich Platform Empowering the Autism Community
Prach: A Feature-Rich Platform Empowering the Autism Community
 
Robotics-Asimov's Laws, Mechanical Subsystems, Robot Kinematics, Robot Dynami...
Robotics-Asimov's Laws, Mechanical Subsystems, Robot Kinematics, Robot Dynami...Robotics-Asimov's Laws, Mechanical Subsystems, Robot Kinematics, Robot Dynami...
Robotics-Asimov's Laws, Mechanical Subsystems, Robot Kinematics, Robot Dynami...
 
Virtual memory management in Operating System
Virtual memory management in Operating SystemVirtual memory management in Operating System
Virtual memory management in Operating System
 
Stork Webinar | APM Transformational planning, Tool Selection & Performance T...
Stork Webinar | APM Transformational planning, Tool Selection & Performance T...Stork Webinar | APM Transformational planning, Tool Selection & Performance T...
Stork Webinar | APM Transformational planning, Tool Selection & Performance T...
 
DEVICE DRIVERS AND INTERRUPTS SERVICE MECHANISM.pdf
DEVICE DRIVERS AND INTERRUPTS  SERVICE MECHANISM.pdfDEVICE DRIVERS AND INTERRUPTS  SERVICE MECHANISM.pdf
DEVICE DRIVERS AND INTERRUPTS SERVICE MECHANISM.pdf
 
Triangulation survey (Basic Mine Surveying)_MI10412MI.pptx
Triangulation survey (Basic Mine Surveying)_MI10412MI.pptxTriangulation survey (Basic Mine Surveying)_MI10412MI.pptx
Triangulation survey (Basic Mine Surveying)_MI10412MI.pptx
 
『澳洲文凭』买麦考瑞大学毕业证书成绩单办理澳洲Macquarie文凭学位证书
『澳洲文凭』买麦考瑞大学毕业证书成绩单办理澳洲Macquarie文凭学位证书『澳洲文凭』买麦考瑞大学毕业证书成绩单办理澳洲Macquarie文凭学位证书
『澳洲文凭』买麦考瑞大学毕业证书成绩单办理澳洲Macquarie文凭学位证书
 
Main Memory Management in Operating System
Main Memory Management in Operating SystemMain Memory Management in Operating System
Main Memory Management in Operating System
 
TEST CASE GENERATION GENERATION BLOCK BOX APPROACH
TEST CASE GENERATION GENERATION BLOCK BOX APPROACHTEST CASE GENERATION GENERATION BLOCK BOX APPROACH
TEST CASE GENERATION GENERATION BLOCK BOX APPROACH
 
Mine Environment II Lab_MI10448MI__________.pptx
Mine Environment II Lab_MI10448MI__________.pptxMine Environment II Lab_MI10448MI__________.pptx
Mine Environment II Lab_MI10448MI__________.pptx
 
Energy Awareness training ppt for manufacturing process.pptx
Energy Awareness training ppt for manufacturing process.pptxEnergy Awareness training ppt for manufacturing process.pptx
Energy Awareness training ppt for manufacturing process.pptx
 
70 POWER PLANT IAE V2500 technical training
70 POWER PLANT IAE V2500 technical training70 POWER PLANT IAE V2500 technical training
70 POWER PLANT IAE V2500 technical training
 
KCD Costa Rica 2024 - Nephio para parvulitos
KCD Costa Rica 2024 - Nephio para parvulitosKCD Costa Rica 2024 - Nephio para parvulitos
KCD Costa Rica 2024 - Nephio para parvulitos
 
SOFTWARE ESTIMATION COCOMO AND FP CALCULATION
SOFTWARE ESTIMATION COCOMO AND FP CALCULATIONSOFTWARE ESTIMATION COCOMO AND FP CALCULATION
SOFTWARE ESTIMATION COCOMO AND FP CALCULATION
 

Surge diverter

  • 1. TESTING OF SURGE DIVERTERS Contents • Introduction • Power Frequency Spark over Test • Hundred per cent Standard Impulse Spark over Test • Front of Wave Spark over Test • Residual Voltage Test • High Current Impulse Test on Surge Diverters • Other Tests • Conclusion and Reference 1Prepared By S ARUN M.Tech Testing of Surge Diverters
  • 2. Introduction • In modern practices, surge diverters or lightning arresters are the most reliable apparatus to project the power system against transient voltages due to lightning and switching surges. • They are invariably used from distribution voltages (400 V) to highest system transmission voltages of 765 kV or above. • Hence, testing them precisely in standard laboratories with standard test procedures are of great importance in modern power system practice. 2Prepared By S ARUN M.Tech Testing of Surge Diverters
  • 3. • A surge diverter has to be a non-conductor for operating power frequency voltages. • It should behave as a short circuit for transient over voltages of impulse character, discharge the heavy current, and recover its insulation without allowing the follow-up of the power frequency current. 3Prepared By S ARUN M.Tech Testing of Surge Diverters
  • 4. Power Frequency Spark over Test • This is routine test. The test is conducted using a series resistance to limit the current in case a spark over occurs. • The arrester has to withstand at least 1.5 times the rated value of the voltage for five successive applications. • The test is generally done also under dry and wet conditions. 4Prepared By S ARUN M.Tech Testing of Surge Diverters
  • 5. Hundred per cent Standard Impulse Spark over Test • This test is conducted to ensure that the diverter operates positively when over voltages of impulse nature occur. • The impulse generator is adjusted to give the standard impulse voltage of a preset magnitude specified in the specifications. • The arrester has to spark over every time in each of the ten successive applications. The test is done with both positive and negative polarity waveforms. 5Prepared By S ARUN M.Tech Testing of Surge Diverters
  • 6. • Sometimes, the test is done by starting at a voltage level that does not give flashover at all, and is repeated in increasing steps of voltage till hundred per cent flashover occurs. • The magnitude of the voltage at which hundred per cent flashover occurs is the required spark over voltage. 6Prepared By S ARUN M.Tech Testing of Surge Diverters
  • 7. Front of Wave Spark over Test • In order to ensure that the surge diverter flashes over for very steep fronted waves of high peaks, this test is conducted using an overvoltage having a rate of rise of 1OO kV/ ps, per 12 kV of the rating. • The estimated maximum steepness of the waves are specified in standards and specifications. 7Prepared By S ARUN M.Tech Testing of Surge Diverters
  • 8. • The test is done by conducting hundred percent spark over voltage test for increasing magnitudes of the standard impulse wave. • The time to spark over is measured. The volt- time characteristic of the diverter is plotted, and the intersection of the V-I characteristic and the line with slope of the virtual steepness of the front gives the front of a wave spark over voltage. 8Prepared By S ARUN M.Tech Testing of Surge Diverters
  • 9. Residual Voltage Test • This test is conducted on pro-rated diverters of ratings in the range 3 to 12 kV only. • The voltage developed across the Non-Linear Resistor units (NLR) during the flow of surge currents through the arrester is-called the 'residual voltage’. • A pro-rated arrester is a complete, suitably housed section of an arrester including series gaps and non-linear series resistors in the same proportion as in the complete arrester. 9Prepared By S ARUN M.Tech Testing of Surge Diverters
  • 10. • Standard impulse currents of the rated magnitudes are applied, and the voltage developed across the diverter is recorded using a suitable voltage divider and a CRO. • The magnitudes of the currents are approximately 0.5,1.0, and 2.0 times the rated currents. • From the oscillogram, a graph is drawn between the current magnitudes and the voltage developed across the diverter pro-rated unit. • From the graph, the residual voltage corresponding to the exact rated current is obtained. 10Prepared By S ARUN M.Tech Testing of Surge Diverters
  • 11. High Current Impulse Test on Surge Diverters • This test is also done on pro-rated diverter units in the range of 3 to 12 kV. • A high current impulse wave of 4/10μs of peak value mentioned in the specifications is applied to a spare unit of identical characteristics. • To pass the test, if (i) the power frequency spark over voltage before and after the test does not differ by more than 10%, (ii) the voltage and current waveforms of the diverter do not differ significantly in the two applications, and (iii) the non-linear resistance elements in the diverter do not show any sign of puncture or external flashover. 11Prepared By S ARUN M.Tech Testing of Surge Diverters
  • 12. Other Tests • The other tests that are normally conducted on surge diverters are (i) mechanical tests like porosity test, temperature cycle tests, and others, (ii) pressure relief test, (iii) the voltage withstand test on the insulator housing of the diverter, (iv) the switching surge flashover test, and (v) the pollution tests. 12Prepared By S ARUN M.Tech Testing of Surge Diverters
  • 13. • Conclusion From these we conclude that know about varies types of testing on surge diverter and also its different ratings. • Reference “High voltage engineering ” by M S Naidu and V Kamaraju, Tata McGraw Hill Education, 5th edition. 13Prepared By S ARUN M.Tech Testing of Surge Diverters