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330   $aThis guide, covering three-phase ac systems from 1 kV to 800 kV, provides recommended electrical operating, safety clearances, and insulation levels in air-insulated electric supply substations; addresses insulation coordination procedures; provides design procedures for the selection and coordination of the insulation levels within the station as they relate to substation clearances; and addresses how reduced clearances in high-voltage ac substations will allow for compact bus arrangements and substation voltage uprating applications.
606   $aElectric cables$xGas insulation
606   $aElectric substations
615  0$aElectric cables$xGas insulation.
615  0$aElectric substations.
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996   $a1427-2020 - IEEE Guide for Recommended Electrical Clearances and Insulation Levels in Air Insulated Electrical Power Substations$92581490
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