1. On behalf on EN-EL October 1 st, 2015 YETS 2015-2016 Works EN-EL [ CF excluded ]

2. YETS 2015-2016 – Works EN-EL [CF excluded] On behalf on EN-EL October 1 st, 2015 Concerning the whole CERN :  Annual test for the Safety networks 10’ power cut of « General Services » & « Safety » networks at 7:00 am in a working day  Auto-transfer test PS – Booster impacted only a week-end on the Meyrin site All other sites (SPS – LHC – 513 – MEY hors 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 ! EL IMPACTS for the YETS 2015-2016

3. On LHC (1/3) :  AUG tests 9 days, 1 day by site – Arcs affected 2 times  N/S Automatism on LHC5 Circuit breaker Replacement on safety switchboard ESD1/5E and normal switchboard EBD1/5E : Works during X-Mas break ? Prohibited access in underground LHC5 - PM56 and CMS PX15 and demi-arcs 5-6 & 4-5  Automatic transfer switch on CV pressurisation switchboard on LHC5 : Works during X-Mas break ? Prohibited access in underground LHC5 PX54_CMS.  USC55 : LV circuit breaker replacement for selectivity EL IMPACTS for the YETS 2015-2016 YETS 2015-2016 – Works EN-EL [CF excluded] On behalf on EN-EL October 1 st, 2015

4. On LHC (2/3) :  Automatic transfer switch on CV pressurisation switchboard on LHC1 Works during X-Mas break ? Prohibited access in underground PX15_ATLAS  Circuit breaker/contactor replacement on ATLAS LV switchboard in UX15 EXD1/15X and EXD2/15X 2 x 2 days  EQD2/1H modification for the adjunction of a column for TE/CRG ATLAS Power cut of TE/CRG switchboard - 1 day (15-16 December proposed by TE/CRG)  Feeders modifications on ATLAS switchboard EOD8/15A – EXD2/1DX – EXD4/15A – EBD1/15A 1 day by switchboard EL IMPACTS for the YETS 2015-2016 YETS 2015-2016 – Works EN-EL [CF excluded] On behalf on EN-EL October 1 st, 2015

5. On LHC (3/3) :  Test of redundancy feeders QPS LHC machine to eliminate non-compliances  Done on compliance logical blocking signals and 18 kV protections tests of the LHC loop points 1 -5 -6 -7 -8 Opening of LHC 18kV loop, without power cut, in coordination with AUG tests  Done on compliance equipment on LV switchboard Limited LV power cuts  Maintenances 48V, transformers, UPS, and more spécifically UPS Cryo LHC  48V PLC revamping LHC1 – USA15 - SDX5 – USC55 – SE18 Without power cut  LHC18, Replacement of 5 I/O frames Supervision affected, without power cut EL IMPACTS for the YETS 2015-2016 YETS 2015-2016 – Works EN-EL [CF excluded] On behalf on EN-EL October 1 st, 2015

6. On SPS (1/2) :  AUG tests 7 days on working days  Oil treatment for 400/18 kV transformer EHT2/BE Pulsed network  Replacement MN coil on WS-Net ORMAZABAL switchboard and supervision consolidation The day of the BA6 or LHC1 AUG test ?  Logipam update for BB6 18 kV protection relay and PLC update for WS-net 18 kV N/S automatism WS-SPS & WS-LHC power cuts, with AUG tests ? EL IMPACTS for the YETS 2015-2016 YETS 2015-2016 – Works EN-EL [CF excluded] On behalf on EN-EL October 1 st, 2015

7. On SPS (2/2) :  Power cut of 18 kV circuit breaker EMD303/B3 for supervision update Pulsed network, RF power cur in BB3  Cabling and cable ways identification for BA’s SPS  Maintenance UPS, 48V, transformers…  48V PLC revamping BB4 –BA7 –BE9 Without power cut  BAF3 Preparation Disconnections, cables and ways dismantling Area creation for RF & CV EL IMPACTS for the YETS 2015-2016 YETS 2015-2016 – Works EN-EL [CF excluded] On behalf on EN-EL October 1 st, 2015

8. On the North Area and the Prevessin site :  AUG tests 4 days – 1 day by site – Working days except for Prevessin  Obsolete 48V chargers replacement for BA82  N/S automatism replacement (PLC+HMI) for BB81 diesel generator No Safety network on EHN1-BA81-BA85 during 3 days  UPS maintenance in BE91 substation, for CCC CCC protected by the UPS redundancy in BE91  Maintenance UPS, 48V, transformers… EL IMPACTS for the YETS 2015-2016 YETS 2015-2016 – Works EN-EL [CF excluded] On behalf on EN-EL October 1 st, 2015

9. On Meyrin (1/2) :  Replacement of 48V chargers for ME25-ME23-ME11-ME6-ME16-ME9  Installation of a new 48V system for ME50 & ME64  Update of logic protection for the 66kV incomer in ME59 18 kV reconfiguration on Meyrin site, without power cut  Extension of the 18 kV switchboard in ME50 Power cut of demineralised water production b.378 during 1 day – LHC Impact  Replacement MN coil on ORMAZABAL switchboard in ME13 & ME15 The day of the AUG test ?  Modification Auto-transfer 18 kV coupling circuit breaker EMD301*9 and update of the auto-transfer PLC in ME9 JURA No Auto-transfer during 3 days EL IMPACTS for the YETS 2015-2016 YETS 2015-2016 – Works EN-EL [CF excluded] On behalf on EN-EL October 1 st, 2015

10. On Meyrin (2/2) :  AUG tests 5 days … during week-ends !  Displacement of the EBD14*80 in b.179 1 day power cut  Replacement of the LV switchboard in ME15 (if not finished before) Limited power cuts of General Services  48V PLC revamping ME6 – ME9 – ME11 –ME23 –ME43 Without power cut  Installation 18 kV circuits breakers in ME25 for b.245 POPS-B  Installation new LV switchboard and mechanicals supports for PSB area  Replacement AUG rack in ME62  Maintenance UPS, 48V, transformers … EL IMPACTS for the YETS 2015-2016 YETS 2015-2016 – Works EN-EL [CF excluded] On behalf on EN-EL October 1 st, 2015

11. Thank you for your attention !