The offered listings of reputed surge arrestor manufacturers, surge arrestor exporters and surge arrestor manufacturing companies from india.

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Surge Arresters

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Surge ArrestersSurge Arresters
 Gaps and gaplessGaps and gapless
 Silicon Carbide and Metal OxideSilicon Carbide and Metal Oxide
 ClassClass
 Tests and RatingsTests and Ratings
 InstallationInstallation
 Field testing and FailuresField testing and Failures

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Silicon Carbide ArrestersSilicon Carbide Arresters
 Blocks cannot conduct continuouslyBlocks cannot conduct continuously
 Series gapsSeries gaps
 Fast transients cause the series gaps to short over andFast transients cause the series gaps to short over and
insert the silicon carbide blocksinsert the silicon carbide blocks
 Gaps must reseal after the arrester operates (gradingGaps must reseal after the arrester operates (grading
circuitry)circuitry)
 Duty cycle ratingDuty cycle rating is the maximum 60hz voltage where theis the maximum 60hz voltage where the
gaps can still re-seal against power follow currentgaps can still re-seal against power follow current
 Subject to external contaminationSubject to external contamination
 Doble study shows that 50% of silicon carbide arrestersDoble study shows that 50% of silicon carbide arresters
tested cannot meet original protection characteristicstested cannot meet original protection characteristics
 Problem with moisture contamination and gaps changingProblem with moisture contamination and gaps changing
characteristicscharacteristics
 Oldest SiC arresters do not have a pressure relief ratingOldest SiC arresters do not have a pressure relief rating

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Metal Oxide arrestersMetal Oxide arresters
 Station Class Metal Oxide arresters were firstStation Class Metal Oxide arresters were first
introduced around 1980 for transmissionintroduced around 1980 for transmission
applicationsapplications
 Originally three varieties:Originally three varieties:
– Gapless – Westinghouse 4” discsGapless – Westinghouse 4” discs
– Shunt gap – General Electric 3” discsShunt gap – General Electric 3” discs
– Series gap – Ohio Brass 3” discsSeries gap – Ohio Brass 3” discs
 Today all station class arresters are gaplessToday all station class arresters are gapless
 Intermediate and distribution ratings introduced inIntermediate and distribution ratings introduced in
mid 80s (gapless)mid 80s (gapless)
 Polymer housings introduced in 90sPolymer housings introduced in 90s

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Arrester base left on structureArrester base left on structure
after failure.after failure.

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Typical 46 kV MOV ArresterTypical 46 kV MOV Arrester
Polymer Housing

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Failed Polymer ArresterFailed Polymer Arrester

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9. 9
You have seen in above slides a short introduction about Surge
Arrestor.If you are looking for exporters and suppliers of Surge
Arrestor and its exporters,you feel free to contact with
tradeindia.you can also visit at:
http://www.tradeindia.com/manufacturers/surge-arrestor.html

10. 9
You have seen in above slides a short introduction about Surge
Arrestor.If you are looking for exporters and suppliers of Surge
Arrestor and its exporters,you feel free to contact with
tradeindia.you can also visit at:
http://www.tradeindia.com/manufacturers/surge-arrestor.html