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- VLF_cable_testing abstract "VLF cable testing is a technique for testing of medium voltage cables. The VLF test can be used in two ways: Apply VLF to measure insulation losses (i.e. the insulation dissipation factor or Tan-delta) at different VLF frequencies that are typically in the range of 0.01 to 0.1 Hz. In this case, the IEEE Std. 400.2 establishes the criteria for assessment. Accessories for partial discharge testing is also available from several VLF test set manufacturers. Apply VLF to XLPE cables in a monitored withstand approach to detect potential failures (faults) in the cable insulation during a planned outage. The tested cable must withstand a VLF (Very low frequency) AC voltage for a specified testing time without flashover. This method yields a \"Go/No Go\" statement. VLF cable testing uses different wave shapes typically sine and square, voltages expressed for these wave shapes differ as RMS is not always applicable. In these cases the reference is via the peak voltage. Frequency ranges used are within the range of 0.01 Hz to 0.1 Hz, where frequency selection depends on the load of the cable. Test voltage levels are calculated using a multiple of the cable's nominal voltage, they are in the range of 1.5 U0 to 3 U0. The VLF cable testing time varies from 15 to 60 minutes. Care must be used lowering the test frequency rates, lowering the test voltage, or decreasing the test time, as this affects the water tree growth which is the main purpose of the test in XLPE cables. The object is to grow the water trees through the XLPE insulation till the cable fails, then the aged part of the cable can be replaced. VLF testing can be considered a short and economical testing criteria for network operators, the IEEE Std. 400.2 establishes the criteria for assessment.In the past DC voltages were used for cable testing, which sometimes was actually damaging to the cable insulation.".
- VLF_cable_testing wikiPageExternalLink 400.2-2004.html.
- VLF_cable_testing wikiPageExternalLink Cable_Testing_Rev_0.pdf.
- VLF_cable_testing wikiPageExternalLink 400-2001.html.
- VLF_cable_testing wikiPageExternalLink 49265?OpenDocument.
- VLF_cable_testing wikiPageExternalLink about.
- VLF_cable_testing wikiPageExternalLink CDFI_Phase_1_Final-Report.pdf.
- VLF_cable_testing wikiPageExternalLink CIGRE_2010_B1-303.pdf.
- VLF_cable_testing wikiPageExternalLink JJicable11_0009_final.pdf.
- VLF_cable_testing wikiPageID "31608627".
- VLF_cable_testing wikiPageLength "8765".
- VLF_cable_testing wikiPageOutDegree "21".
- VLF_cable_testing wikiPageRevisionID "669150773".
- VLF_cable_testing wikiPageWikiLink Alternating_current.
- VLF_cable_testing wikiPageWikiLink Category:Electronic_test_equipment.
- VLF_cable_testing wikiPageWikiLink Category:Power_cables.
- VLF_cable_testing wikiPageWikiLink Dielectric.
- VLF_cable_testing wikiPageWikiLink Dielectric_withstand_test.
- VLF_cable_testing wikiPageWikiLink Direct_current.
- VLF_cable_testing wikiPageWikiLink Dissipation_factor.
- VLF_cable_testing wikiPageWikiLink Electric_arc.
- VLF_cable_testing wikiPageWikiLink Electric_power_distribution.
- VLF_cable_testing wikiPageWikiLink Electric_power_transmission.
- VLF_cable_testing wikiPageWikiLink European_Committee_for_Electrotechnical_Standardization.
- VLF_cable_testing wikiPageWikiLink Fault_(power_engineering).
- VLF_cable_testing wikiPageWikiLink High_voltage.
- VLF_cable_testing wikiPageWikiLink Hipot.
- VLF_cable_testing wikiPageWikiLink Institute_of_Electrical_and_Electronics_Engineers.
- VLF_cable_testing wikiPageWikiLink Insulator_(electricity).
- VLF_cable_testing wikiPageWikiLink Partial_discharge.
- VLF_cable_testing wikiPageWikiLink Public_utility.
- VLF_cable_testing wikiPageWikiLink Short_circuit.
- VLF_cable_testing wikiPageWikiLink Very_low_frequency.
- VLF_cable_testing wikiPageWikiLinkText "VLF cable testing".
- VLF_cable_testing wikiPageUsesTemplate Template:Refimprove.
- VLF_cable_testing wikiPageUsesTemplate Template:Reflist.
- VLF_cable_testing subject Category:Electronic_test_equipment.
- VLF_cable_testing subject Category:Power_cables.
- VLF_cable_testing hypernym Technique.
- VLF_cable_testing type Instrument.
- VLF_cable_testing type TopicalConcept.
- VLF_cable_testing type Component.
- VLF_cable_testing type Instrument.
- VLF_cable_testing comment "VLF cable testing is a technique for testing of medium voltage cables. The VLF test can be used in two ways: Apply VLF to measure insulation losses (i.e. the insulation dissipation factor or Tan-delta) at different VLF frequencies that are typically in the range of 0.01 to 0.1 Hz. In this case, the IEEE Std. 400.2 establishes the criteria for assessment. Accessories for partial discharge testing is also available from several VLF test set manufacturers.".
- VLF_cable_testing label "VLF cable testing".
- VLF_cable_testing sameAs Q7907154.
- VLF_cable_testing sameAs m.0gmbv8x.
- VLF_cable_testing sameAs Q7907154.
- VLF_cable_testing wasDerivedFrom VLF_cable_testing?oldid=669150773.
- VLF_cable_testing isPrimaryTopicOf VLF_cable_testing.