Surge Arrestor

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

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Surge Arrestor

  1. 1. 1 Surge Arresters
  2. 2. 2 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
  3. 3. 3 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
  4. 4. 4 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
  5. 5. 5 Arrester base left on structureArrester base left on structure after failure.after failure.
  6. 6. 6 Typical 46 kV MOV ArresterTypical 46 kV MOV Arrester Polymer Housing
  7. 7. 7 Failed Polymer ArresterFailed Polymer Arrester
  8. 8. 8
  9. 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. 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

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