IEEE C62.11-1999 pdf download IEEE Standard for Metal-Oxide Surge Arresters for AC Power Circuits (> 1 kV)
3.4 arrester, distribution, heavy duty class: An arrester normally used to prolect overhead distribution systems exposed to severe lightning currents.
3.5 arrester, distribution, light duty class: An arrester normally installed on and used to protect underground distribution systems where the major portion of the lightning stroke current is discharged by anarrester located at the overhead line/cable junction.
3.6 arrester, distribution, normal duty class: An arrester normally used to protect overhead distributionsystems exposed to normal lightning currents.
3.7 arrester, liquid-immersed type: An arrester designed for use immersed in an insulating liquid
3.8 arrester, riser pole type: An arrester for pole mounting normally used to protect underground distribution cable and equipment.
3.9 arrester unit: Any section of a multiunit arrester.
3.10 basic lightning impulse insulation level (BIL): (A) The electrical strength of insulation expressed interms of the crest value of a standard lightning impulse under standard atmospheric conditions. BIL may beexpressed as either statistical or conventional (see lEEE Std 1313.1-1996). (B) A specifc insulation levelexpressed as the crest value of a standard lightning impulse (see ANSI C92.1-1982 and IEEE Std C62.221991).
BIL (conventional): Applicable specifically to non-self-restoring insulations.The crest yalue of astandard lightning impulse for which the insulation does not exhibit disruptive discharge when sub-jected to a specific number of applications of this impulse under specified conditions (see IEEE StdC62.2-1987)
BIL (statistical): Applicable specifically to self-restoring insulations. The crest value of a standardlightning impulse for which the insulation exhibits a 90% probability of withstand (or a 10% proba.bility of failure) under specified conditions (see IEEE Std C62.2-1987).
3.11 basic switching impulse insulation level (BSL): (A) The electrical strength of insulation expressed interms of the crest value of astandard switching impulse. expressed as either statistical or conventional (see ANSI C92.2-1982 and IEEE Std C62.2-1987).(B) A specific insulation level expressed as thecrest value of a standard switching impulse (see ANSI C92.1-1982 and EEE Std C62.22-1991).BSL (conventional): Applicable specifically to non-self-restoring insulations. The crest value of astandard switching impulse for which the insulation does not exhibit disruptive discharge when sub.jected to a specific number of impulses under specified conditions (see IEEE Std C62.2-1987).BSL (statistical): Applicable specifically to self-restoring insulations. The crest value of a standardswitching impulse for which the insulation exhibits a 90% probability of withstand (or a 10% probability of failure) under specified conditions (see IEEE Std C62.2-1987).
3.12 certification tests: Tests run on a regular, periodic basis to verify that selected key performance characteristics of a product, or representative samples thereof, have remained within performance specifications.
3.13 classification of arresters: Arrester classification is determined by the prescribed test requirements ofthis standard. These classifications are: station, intermediate, distribution heavy duty, distribution normalduty. distribution light duty.
3.14 classifying current: The designated current used to perform the classifcation tests. Note: See Annex Bfor a summary of test parameters by classification.
3.15 conformance tests: Tests made, when required,to demonstrate selected performance characteristics ofa product or representative samples thereof. Note: See Table 4, Table 5, and Table 6 in Clause 8.
IEEE C62.11-1999 pdf download
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