AREVA

MAINTENANCE RECOMM EN DATIONS

I

NE 48 A/E

The quality system of AREVA T&D "High Voltage Switchgear Service " is complying with ISOStandard 9001,2000 version, since 2003 and ISO Standard 14001 since 2006. The application ofour maintenance recommendations must be exclusively carried out with AREVA T&D original spareparts and specific maintenance tools.

FKGlGEN ERATOR CI RCU IT-BREAKERS

WITH HYDRAULIC MECHANISM CIN TYPE{

,:.rtrj 1sbvFi+- --'" 4,i-* . .-; - . .,ttF.5.-3.i* td.i.*.st{. -.:IIia

I

i-

Doc -N' Date Revision Author Aooroval Paoe

NE 48 A/E 30t03t07 FHV -VM 1t3

illair rtenance vislt (1 or 2 times a year) / CB into serviceInspection (Every 5 loars ) / CB out of service

Mid-life overhaul (After {0112 years of service) / GB out of serviceLife Extension (Service time: 20 years) / GB out of service

Refurbishing (Mechanicaloperations: 3000 CO cycles) / CB out of serviceRefurbishing (according to electrical wearing limit of the equipment)CB Out of service

iliscellaneous inspectionsI I r a t r Read and record the ooeratino counter fiquresI I T I I Check qeneral aspect of equipment, visual aspect (corrosion, pollution, heating marks)I I I T T Check the conditions of air-vents and permanent heating

r I I I Check tighteninq of not pressurised elements (frame, cubicle)I I I I Check the low voltage terminal blocks tightening ( first, six months after commissioning)I I I I Check the mnditions of capacitors, lightning anesters, measurement transformers

lif aoolicable)I t T I I Check lockino and alarm functionsT I I I I Check tiohtness of enclosure (if busbar is under pressure)I Chanoe tiohtness seal of enclosure coversI Verifu CB Watch 2 monitorino device (if applicable)

SF6 GheckinsI Check SF6 Dressure (if the C,B. is supplied with permanent densimeter)

I r t I T Check SF6 qas rated pressureI I I I T Check qualitv of SF6 qas (Accordinq to operating conditions of the circuit-brgqker)

Circuit-breaker poleI I I I I Measure of main contacts rebistance ,,i.

I r I I t I Check condition of crank lever assemblvI I r I I Check mndition of insulatins suooorts of oolesI I T I I Grease the operatins rod (qrease box)

I I lmolement last technical improvements brought by the manufacturerI Chanoe the oas seals of poles & check the condition of intenupting chgq1belg-

I t Chanoe (or recondition) intem-lpting chambers (to be completed by the manufacturar)Disconnecting switch pole (SKGI/ MKGII lKGll

I I I I I Measure main contacts resistanceI I I t t lnspect contacts

I I I I t T Check condition of crank lever assemblyt I I T I Check condition of insulating supports of polesI I I I I Grease the operating rod (grease box)

thrdraulic ooerafinq mechanismI I I I T I Read and record the DUmD starts counter figuresI I I I r I Check qeneral tiqhtness of the hydraulic systemI I I I I I Check receiver oil level

T I I I Chanoe the oil filterr I Check or reolace HP flexible pipeI I Chanoe hvdraulic oilT T I Make orierhaul (or uporadinq) of hvdraulic system

r Chanqe of nitroqen accumulator and safety valvet I Carrv out the accumulator high pressure test (according to local laws)

Performance TestsI I T I I Measure operating times of main contacts and auxiliary contacts

T Perform at least 2 CO duty cycles per year when apparatus is scarcely used, in orderto check that circuit-breaker and a$sociated control circuits are working propqdy

r f a I I Check oil consumption after operation cyclesI I I I I Check the settinq of Oil & Gas thresholdsI I I T I Verifv the enerqv of operatinq mechanism

t T I t I I Record all results on test reportDoc

-N' Date Revision Author Aporoval PaqeNE 48 A/E 30/03/07 FHV.VM a3

RECO MM EN DAI'OA'S FOR FKG 1 CIRCUIT.BREAKER U P.G RADI NG :

. Upgrading of main hydraulic components (For FKG1 circuit-breakers manufactured s 2005)r Use of grease instead of oil for disconnecting switch reduction gearbox (For FKG1 circuit-breakers

manufactured < 2001)

LIM'T OF FKG1 SPARE PARTS SUPPLY:

r Spare parts for FKG'I poles : supply capacity > 15 years. Spare parts for hydraulic mechanism parts: supply capacity > 15 years. Main spare parts for disconnecting switch motorized mechanism: supply capacity > 15 years. LV equipment : contact AREVA T&D Service / Villeurbanne (France)