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W .Iwanski

Interventions on electrical distribution and racks’ infrastructure still to be done during LS1 and their impact . W .Iwanski. Outline. Modifications of switchboards EXD16/15X and EXD26/15X New UPS in US15 New switchboards EOD2’/15, ESD2’/15 and EOD5’/15A New switchboard EOD8/15A

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W .Iwanski

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  1. Interventions on electrical distribution and racks’ infrastructure still to be done during LS1 and their impact W.Iwanski

  2. Outline • Modifications of switchboards EXD16/15X and EXD26/15X • New UPS in US15 • New switchboards EOD2’/15, ESD2’/15 and EOD5’/15A • New switchboard EOD8/15A • Modifications of repartition boxes in 19 TDAQ ROS racks in USA15 • Refurbishment of cooling turbines in all electronic racks in USA15, US15 and UX15 W.iwanski PH/ESE-BE

  3. Modifications of switchboards EXD16/15X and EXD26/15X • Goal: to integrate newly added breakers with our monitoring system • Due to lack of space inside those switchboards, one has to move an interlock module outside • Impact: Stop of supply for racks on HOA and HOC for 1 day (November 2013) W.iwanski PH/ESE-BE

  4. New UPS in US15 • Goal: to provide smooth supply for electronic racks fed from Normal network in US15 L2 • Up to 10 min of autonomy, no Diesel back-up • Impact: Stop of supply for racks fed from Normal network in US15 during 5 days (9-13 December 2013) W.iwanski PH/ESE-BE

  5. New switchboards EOD2’/15, ESD2’/15 and EOD5’/15A • Goal: to provide new type of control over powering outputs • Motorised breakers which keep failing to turn ON when driven from DCS will be replaced by a breaker_+_contactor combo in new switchboards • Impact: Stop of supply for all equipment fed from UPS and Diesel switchboards EOD2/15, ESD2/15 and EOD5/15A for ~ 4 weeks (> March 2014) • EOD2/15: ID heaters, Muons, DCS station, Pixel-DCS, SCT-DCS • ESD2/15: Sniffers, DSS station • EOD5/15A: Muons, Larg cooling station, ID heaters, ID evaporative cooling W.iwanski PH/ESE-BE

  6. New switchboard EOD8/15A • Goal: to provide UPS power for new installations in USA15 • Impact: Stop of systems running on temporary supply when connecting them to this new switchboard (> March 2014) • IBL cooling, new racks, Tile cooling station, Larg cooling station (moved from EOD5/15A), Turbo pump .. W.iwanski PH/ESE-BE

  7. Modifications of repartition boxes in 19 TDAQ ROS racks in USA15 • Goal: to reduce inrush current when powering racks ON • Impact: Stop of supply in each concerned rack for 1 day (> March 2014) W.iwanski PH/ESE-BE

  8. Refurbishment of cooling turbines in all electronic racks in UX15, USA15 and US15 (1) • Goal: preventive change of motor+fan modules inside turbines due to projected end-of-life of bearings • Impact in UX15: Stop of supply in each switchboard supplying a group of racks for ~ 1 day • HOA (5 turbines): 1 day • HOC (5 turbines): 1 day W.iwanski PH/ESE-BE

  9. Refurbishment of cooling turbines in all electronic racks in USA15, US15 and UX15 (2) • Impact in UX15 (cont’d) • HS USA side (23 turbines): 5 days • Ground floor: 1 day • 1st floor: 1 day • 2nd floor: 1 day • 4th floor: 1 day • 7th & 8th floor: 1 day W.iwanski PH/ESE-BE

  10. Refurbishment of cooling turbines in all electronic racks in USA15, US15 and UX15 (3) • Impact in UX15 (cont’d) • HS US side (17 turbines): 4 days • Ground floor: 1 day • 1st floor: 1 day • 2nd floor: 1 day • 7th & 8th floor: 1 day W.iwanski PH/ESE-BE

  11. Refurbishment of cooling turbines in all electronic racks in USA15, US15 and UX15 (4) • Impact in UX15 (cont’d) • BWA (16 turbines): 3 days • BWC (16 turbines) : 3 days W.iwanski PH/ESE-BE

  12. Refurbishment of cooling turbines in all electronic racks in USA15, US15 and UX15 (5) • Impact in USA15 L1 (65 turbines), USA15 L2 (70 turbines) and US15 L2 (28 turbines): Stop of supply in each concerned rack for ~ 1 hour W.iwanski PH/ESE-BE

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