SF 6 VS SOLID DIELECTRIC SWITCHGEAR INTRODUCTION A

SF 6 VS SOLID DIELECTRIC SWITCHGEAR

INTRODUCTION Ø A. AKIN OYEKENU, P. E. -TEXAS Ø ± 9 YEARS W/CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC (CNP) Ø CURRENT POSITION – ENGINEERING SUPERVISOR – MAJOR UNDERGROUND ENGINEERING PAD MOUNT Ø WORKED IN VARIOUS DEPARTMENTS AT CNP Ø SWEDE MATERIAL, EQUIPMENT, CODES AND STANDARDS COMMITTEE MEMBER 2

BACKGROUND INFORMATION Ø WHAT IS A “DIELECTRIC” Ø FORMS OF DIELECTRICS § SOLIDS – PORCELAIN(CERAMIC), MICA, GLASS, PLASTICS, EPOXY RESIN § LIQUIDS – MINERAL OILS, CASTOR OIL, DISTILLED/PURIFIED WATER, LIQUID OXYGEN, NITROGEN, HYDROGEN, HELIUM, ARGON § GASES – SULFUR HEXAFLUORIDE SF 6), ( NITROGEN N 2), ( AIR, CARBON DIOXIDE (CO 2) § VACUUM. 3

CENTERPOINT ENERGY Ø TRANSMISSION (345, 138, 69 V)K § GAS AND LIQUID O SF 6 AND OIL Ø SUBSTATION § GAS AND LIQUID O SF 6, VACUUM, OIL Ø DISTRIBUTION § GAS, SOLID, AND LIQUID O SF 6, EPOXY/VACUUM, AND OIL 4

Considerations Ø VISIBLE BREAK (SAFETY) Ø SIZE (PHYSICAL) Ø VOLTAGE AVAILABILITY (DISTRIBUTION STD. VOLTAGES) Ø OTHER – WITHSTAND, BIL, COST 5

SF 6 / Vacuum (Powell Esco) . 6.

Air (S&C) 7

Oil / Vacuum (Trayer) 8 This report also contains Confidential Critical Energy Infrastructure Information.

Solid / Vacuum (Elastimold MVI & G&W Trident MVI) 9 This report also contains Confidential Critical Energy Infrastructure Information.

THANK YOU . 10