2. Powering tests after 16/17 EYETS
M. Solfaroli and M. Pojer
On behalf of all teams involved in the powering tests
10/04/2017

3. M. Pojer & M. Solfaroli – BE/OP
Preparation status
In 7oo8 sectors, activities are ~ completed:
ElQA completed
Cables reconnected
Power converters de-condemned
QPS-IST well advanced
All IPQs and IPDs are released, the Mains are released in 1 sector
Redundant UPS power distribution tests were done in two sectors (78 and 81)
M. Pojer & M. Solfaroli – BE/OP

4. M. Pojer & M. Solfaroli – BE/OP
ElQA status
In S12, ElQA is still on going and few NCs have been identified
"LHC-QN-ELQA-TP4C-HVQ-RB.A12-Line5-001”, by Giorgio D'Angelo
At the end of EYETS , during the qualification of the RB circuit, a breakdown occurred.
"LHC-QN-ELQA-MIC-C-MBBR2359-A11L2-001”, by Giorgio D'Angelo
At the end of EYETS , during the MIC-C campaign, the voltage tap EE211 was found open. A verification was done, and the Vtap is open below the IFS box
"LHC-QN-ELQA-TP4-E-HVQ-RSD1.A12B1-001”, by Giorgio D'Angelo
At the end of EYETS , during the high voltage qualification, a breakdown occurred. The cold part of the circuit was tested and passed. The fault must be in the warm instrumentation. Further diagnostic needed.
"LHC-QN-ELQA-TP4-E-HVQ-RQTF.A12B2-001”, by Giorgio D'Angelo
M. Pojer & M. Solfaroli – BE/OP

5. M. Pojer & M. Solfaroli – BE/OP
Powering tests
Debugging started almost 2 weeks ago on the 60 A circuits (affected by the FGC lite change)
Several software issues find and identified
PIC GUI and Circuit Synoptic were mainly affected by the SLC6 to CC7 change
PIC was upgraded to safely mask global protection mechanism
FGC92 change made the automatic analysis impossible for PNO.a1
Additional variables have been modified for the low current circuits (60 and 120 A)  120 A automatic analysis of PNO.d1 had to be modified
PIC-CRYO interface tested everywhere
Issue identified on 4 PLC, not communicating with CRYO PLC, due to modifications on CRYO control side
Early powering was extremely important
Phase 1 powering started in all available sectors
The DSO test has been successfully done on Friday 7  phase 2 powering can start as soon as the UPS tests are done
M. Pojer & M. Solfaroli – BE/OP

6. M. Pojer & M. Solfaroli – BE/OP
General
Some IPQs have been identified with inversion of voltage taps between the two apertures (no safety issue)
Several 600 A switch closing failures (especially in S23 and in particular for circuits RSS.A23B1)
Several interlock tests on IPQs to be signed by hand, after failure of automatic analysis
Many IPQs are ready for the MP3 signature
To be done:
Calibration of high current circuits DCCT
Test on 1 converter per type with new FGC-lite in one RR to be planned
Test of water interlock stopping water pumps in all sectors
Internal splice measurements in 9 positions in S12 (after commissioning, with ElQA support)
RCS.A78B2 and RCO.A78B1: fault localization when powering Mains
Conical joint measurement in UA27, with prototypal installation (issues after LS1)
M. Pojer & M. Solfaroli – BE/OP

7. M. Pojer & M. Solfaroli – BE/OP
XR2 and MR2
“Problem” identified on the 600 A IT correctors (see next slide
M. Pojer & M. Solfaroli – BE/OP

8. “Problem” on the IT correctors
I_MEAS for RCBXH3.R2
We forgot to deactivate the SIS interlock (combined powering or RCBXH and V, with limit to 420 A)
M. Pojer & M. Solfaroli – BE/OP

9. M. Pojer & M. Solfaroli – BE/OP
ARC23
600 A are at PNO.d3
120 A completed
60 A: PNO.d1 and PNO.a1 missing
M. Pojer & M. Solfaroli – BE/OP

10. M. Pojer & M. Solfaroli – BE/OP
ARC23 – 120 A
For the 120 A circuits in R3, the PC is a 40 V (vs 10V) and the automatic analysis is failing
M. Pojer & M. Solfaroli – BE/OP

11. M. Pojer & M. Solfaroli – BE/OP
ARC34
Mains in S34 have already gone through the interlock tests
M. Pojer & M. Solfaroli – BE/OP

12. M. Pojer & M. Solfaroli – BE/OP
ML4
M. Pojer & M. Solfaroli – BE/OP

13. M. Pojer & M. Solfaroli – BE/OP
MR4
M. Pojer & M. Solfaroli – BE/OP

14. M. Pojer & M. Solfaroli – BE/OP
ARC45
Many 600 A tested in PNO.d3
A couple of PIC2 failures to be analysed
120 A are missing the PNO.d1
60 A not started
M. Pojer & M. Solfaroli – BE/OP

15. M. Pojer & M. Solfaroli – BE/OP
LL5 and XL5
120 A are at PNO.d1
M. Pojer & M. Solfaroli – BE/OP

16. M. Pojer & M. Solfaroli – BE/OP
XR5 and LR5
120 A are at PNO.d1
M. Pojer & M. Solfaroli – BE/OP

17. M. Pojer & M. Solfaroli – BE/OP
ARC56
600 A started (some have PIC2 to be analysed
120 A are at PNO.d1
60 A not started
M. Pojer & M. Solfaroli – BE/OP

18. M. Pojer & M. Solfaroli – BE/OP
ML6 and MR6
M. Pojer & M. Solfaroli – BE/OP

19. M. Pojer & M. Solfaroli – BE/OP
ARC67
600 A started (some have PIC2 to be analysed)
EE to be signed off
120 A not started
60 A PNO.a1 missing
M. Pojer & M. Solfaroli – BE/OP

20. M. Pojer & M. Solfaroli – BE/OP
ARC78
600 A ongoing (some have PIC2 to be analysed)
RCO.A78B2 QPS-IST missing
120 A few failed PNO.d1
60 A ongoing
M. Pojer & M. Solfaroli – BE/OP

21. M. Pojer & M. Solfaroli – BE/OP
ML8 and XL8
M. Pojer & M. Solfaroli – BE/OP

22. M. Pojer & M. Solfaroli – BE/OP
XR8 and MR8
M. Pojer & M. Solfaroli – BE/OP

23. M. Pojer & M. Solfaroli – BE/OP
ARC81
600 A ongoing
120 A ongoing
60 A PNO.a1 missing; a couple of failure at PNO.d1
M. Pojer & M. Solfaroli – BE/OP

24. M. Pojer & M. Solfaroli – BE/OP
LL1 and XL1
120 A ongoing
M. Pojer & M. Solfaroli – BE/OP

25. M. Pojer & M. Solfaroli – BE/OP
Access constraints
M. Pojer & M. Solfaroli – BE/OP

26. Cryogenics problem at P4
From Katy Baseline: Test UPS du P4 + reconfiguration cryo des secteurs 3-4 et 4-5 (10-11 Avril) à Pas d’impact sur la RF, qui peut continuer sans interruption son conditionnement. Impact uniquement sur les arcs. Cryo a annoncé un problème sur une vanne d’eau, d’un compresseur en surface au Point 4. Le presse-étoupe de la vanne était remplacé pendant le EYETS, mais la vanne est à nouveau fuyarde. Un remplacement complet de la vanne est à prévoir (la vanne a 20 ans…) et la vanne est disponible. MAIS, cette intervention a un impact direct sur la RF, qui perdra ses conditions cryogéniques pendant 3 jours (Lundi 10, mardi 11 et mercredi 12). De ce fait une partie du travail de conditionnement RF devra être réitéré et le conditionnement LLRF ne pourra pas débuter avant mardi 18/mercredi 19 Avril (vs mercredi 12 prevu actuellement). La durée du conditionnement LLRF est de 2wks…donc il ne sera pas terminé avant mardi/mercredi 3 mai. Ma question est : que-est-ce on fait ? Pouvons-nous donner l’OK a la Cryo ? ou cette intervention peut être repoussé au TS1 (3 Juillet) ? Si la cryo procède avec le changement la RF pourrait ne pas être prête pour le 1er Mai.
M. Pojer & M. Solfaroli – BE/OP

27. Cryogenics problem at P4
From Dimitri According to the master coordination planning on Monday 10th, the UPS test at P4 is approved and the cryogenic conditions are not guaranteed for the 36 hours recovery time (including RF). This is already in the planning (and also includes the final re-configuration of the two cryoplants). Given the recent P8 recovery experience with the new UPS test approach, the recovery time could be reduced from 36 to 24 hours. The question of the water leaking valve (approximately 2 liters of water per day) can be treated separately and cannot be considered today at the same level. In case that the water valve exchange is authorised, the cryogenic conditions will be lost (including RF) for 24 additional hours. In case that the valve has to be changed separately, the overall loss of cryogenic conditions will be 2 days and therefore it is recommended to mutualize the interventions
M. Pojer & M. Solfaroli – BE/OP