EYETS 2016-2017 Works EN-EL [ FC excluded ] On behalf on EN-EL

EN-EL IMPACTS for the EYETS 2016-2017 Concerning the whole CERN : Annual test for the Safety networks 10’ power cut of « General Services » & « Safety » networks at 6:00 am in a working day Prohibited access in underground Auto-transfer test PS – Booster impacted only a week-end on the Meyrin site All other sites (SPS – LHC – 513 – MEY without PS – Prevessin – ZN…) repowered without power cut on degraded configuration during the week-end Meyrin - LHC1 – LHC18 - BA6 – BA7 Safety network not available only Saturday in working hours ! EYETS 2016-2017 – Works EN-EL [FC excluded] On behalf on EN-EL

EN-EL IMPACTS for the EYETS 2016-2017 On LHC (1/2) : AUG tests 9 days, 1 day by site on working days – Arcs affected Prohibited access in underground Done on compliance equipment on LV switchboard Replacement of 48Vdc interrupter without LV power cuts Test of redundancy feeders QPS LHC machine to eliminate non-compliances RTU replacement on all alcoves PLC replacement for physics racks for ATLAS (waiting ATLAS approval) Maintenances 48V, transformers, UPS, and more specifically UPS Cryo LHC EYETS 2016-2017 – Works EN-EL [FC excluded] On behalf on EN-EL

EN-EL IMPACTS for the EYETS 2016-2017 On LHC (2/2) : Re-routing cable for HL-LHC MP7 (LHC General Services 18 kV) No (or partial) Autotransfer 2 weeks (16-24/01) in degraded mode !!! General Services + Machine cables from LHC1 to LHC18 1 month (15/02 – 14/03) in degraded mode (8 MVA maxi for LHC18 from BA7) !!! Not compatible with LHC18 & SPS AUG tests Modification of 66 kV protection relays LHC1-2-4-6 (Machine network) + BE9 (General Services for LHC loop) 2 days for each in degraded mode (limitation of power) Not compatible with LHC AUG tests EYETS 2016-2017 – Works EN-EL [FC excluded] On behalf on EN-EL

EN-EL IMPACTS for the EYETS 2016-2017 On SPS (1/2) : AUG tests 7 days on working days Prohibited access in underground SPS Consolidation project UPS system replacement BA3, BB3, BB5 & BA7 (UPS + EOD swichtboard) 48Vdc system replacement BA3, BB3 & BA7 Replacement of the Emergency lighting BA2 & BA4 Replacement of the 3 LV switchboard for BB3 General Services and EPC & RF auxiliaries Modification on EKD1/K_ 3,3 kV switchboard BA4 & BA5 (safety network) before the EYETS Replacement on ESD210/B_ 400 V switchboard BK4 & BK5 (safety network) Prohibited access in underground, AWAKE included Maintenance UPS, 48V, transformers… EYETS 2016-2017 – Works EN-EL [FC excluded] On behalf on EN-EL

EN-EL IMPACTS for the EYETS 2016-2017 On SPS (2/2) : Re-routing cable for HL-LHC Safety networks for BA6 & BA7 1 month (15/02 – 14/03) in degraded mode (temporary gensets) Not compatible with SPS AUG tests (overload of Stable network) EYETS 2016-2017 – Works EN-EL [FC excluded] On behalf on EN-EL

EN-EL IMPACTS for the EYETS 2016-2017 On the North Area and the Prevessin site : AUG tests 4 days – 1 day by site on working days except for Prevessin Obsolete 48Vdc chargers replacement for BA80-BA81-BA82 UPS maintenance in BE91 substation, for CCC CCC protected by the UPS redundancy in BE91 Maintenance UPS, 48V, transformers… EYETS 2016-2017 – Works EN-EL [FC excluded] On behalf on EN-EL

EN-EL IMPACTS for the EYETS 2016-2017 On Meyrin (1/2) : AUG tests 4-5 days … during week-ends ! Done on compliance equipment on LV switchboard Replacement of 48Vdc interrupter without LV power cuts Replacement MN coil on ORMAZABAL switchboard in ME13, ME15 & ME62 The day of the AUG test ? Maintenance UPS, 48V, transformers … Replacement of the 18 kV switchboard in ME16 PS loop open during works - Not compatible with AUG tests EYETS 2016-2017 – Works EN-EL [FC excluded] On behalf on EN-EL

EN-EL IMPACTS for the EYETS 2016-2017 On Meyrin (2/2) : Replacement of the 18/0,4 kV transformer near ME50 (b.378) Power cut of demineralised water production b.378 during 1 day – LHC Impact Works for PSB-LIU (POPS-B b.245) De-cabling of 3 old LV switchboard (ERD16-17-18*25) Installation and cabling of the 3 new LV switchboard + 1 UPS (EDD1-2*25A + EOD1*25A) Installation of 1 transformer near b.245 Cabling of 48 Vdc & General Services LV switchboard on b.245 EYETS 2016-2017 – Works EN-EL [FC excluded] On behalf on EN-EL

Thank you for your attention !