HCC report
Summary of the tests of the
LSS8L power converters in
short-circuit
F. Rodríguez-Mateos on behalf of
R.Ballet-Thouble, E.Barbero-Soto, F.Bordry, S.Brown, M.Cayla,
P.Charrue, F.Chevrier, Ch.Coupat, PY.Collaud, C.Dehavay, JY.Dutoit,
A.Foreste, E.Garde, JC.Guillaume, E.Hatziangeli, J.Iñigo-Golfín,
Q.King, M.Lamont, R.Lauckner, E.Molina, B.Ocelli, S.Page, J.Pedersen,
R.Saban, H.Thiesen, J.Thomsen, J.Wozniak
TC CO July 28 2005
Outline
 Equipment under test
 configurations
 Procedures
 Main findings
 Conclusions and outlook
TC CO July 28 2005
Equipment under test
Q5
[5kA/8V]
RQ5.L8B1
RQ5.L8B2
RCBCH5.L8B1
RCBCHS5.L8B1
RCBCHS5.L8B2
RCBCV5.L8B2
RCBCVS5.L8B1
RCBCVS5.L8B2
[±120A/±10V]
Q4
XL8
RQ4.L8B1 [4kA/8V]
RQ4.L8B2
RQX.L8
RTQX1.L8
RTQX2.L8
RD2.L8 [7kA/8V]
RD1.L8
RCBYH4.L8B2
RCBYHS4.L8B1
RCBYHS4.L8B2
RCBYV4.L8B1
RCBYVS4.L8B1
RCBYVS4.L8B2
RCBXH1.L8
RCBXH2.L8
RCBXH3.L8
RQSX3.L8
[±120A/±10V]
TC CO July 28 2005
courtesy H.Thiesen
RCOSX3.L8
RCSSX3.L8
RCTX3.L8
[7kA/8V]
RCBXV1.L8
RCBXV2.L8
RCBXV3.L8
[±600A/±10V]
RCOX3.L8
RCSX3.L8
[±120A/±10V]
Power converters configurations (1)
18kV
400V
UPS
PC
Water
TC CO July 28 2005
RCBYH4.L8B2
RCBYHS4.L8B1
RCBYHS4.L8B2
RCBYV4.L8B1
RCBYVS4.L8B1
RCBYVS4.L8B2
RCBCH5.L8B1
RCBCHS5.L8B1
RCBCHS5.L8B2
RCBCV5.L8B2
RCBCVS5.L8B1
RCBCVS5.L8B2
RQ4.L8B1
RQ4.L8B2
RD1.L8
RD2.L8
RCBXH1.L8
RCBXH2.L8
RCBXH3.L8
RCBXV1.L8
RCBXV2.L8
RCBXV3.L8
RQSX3.L8
RCOSX3.L8
RCOX3.L8
RCSSX3.L8
RCSX3.L8
RCTX3.L8
courtesy H.Thiesen
RQ5.L8B1
RQ5.L8B2
UPS
18kV
400V
PC1 PC2
Water
Power converters configurations (2)
RQX.L8
RTQX1.L8
RTQX2.L8
18kV
400V
600A
4.7kA
UPS
7kA
I.T.
En
Cal.
FIP
PIC
Water
Chilled
Water
TC CO July 28 2005
courtesy H.Thiesen
TC CO July 28 2005
Procedures
Action
Equipment
Group(s)
Responsible
1
The
individual
electrical
feeder
is
unlocked and the converter is connected
to the grid
AB/PO TS/EL
2
Tests to verify that the converter shuts
down in case of loss of cooling water in
the converter or in the cables and tubes
AB/PO TS/EL
TS/CV
3
The converter is turned on and the
control loop is tuned
AB/PO
4
Tests to verify the remote operation of
the power converter via the WorldFip
AB/PO
AB/CO
5
8-hour heat runs at Iult carried-out with
the converter connected to the Control
Network
AB/PO TS/EL
TS/CV
TC CO July 28 2005
The findings
 Cabling
 Thermal behaviour of cables is very sensitive to their
arrangement on trays, ducts, transitions, etc.
Corrections have been applied and validated
 Validation of optimized sections (240 and 35 mm2,
respectively, for corrector circuits generically known as
“600A”and “120A”): special attention to hot spots
 A more complete procedure for high voltage tests on
water-cooled cables is required
 The crimped fittings on the flexible tubes of the water
cooled cables must be insulated
 Indirect cooling of cables in the ducts: an alarm must be
generated if the temperature exceeds a given value
 Water cooling
 Setting and balancing of water circuits must be done
before short-circuit tests start
 Scheme for three-cable circuits (Q4,Q5) will be changed
 Reference Database: ultimate currents
TC CO July 28 2005
The findings (2)
 Power converters
 Estimated times for the different phases are confirmed
 Contrary to what was initially specified, World-Fip has to
be operational from the very beginning of the tests
 While the individual commissioning of the PC is done in
situ, the field control room is really needed for the
parallel testing during the 8-h heat runs
 The power terminals of one of the IT high-current
converters seem to be too far apart
 “Visites d’inspection” must
 be scheduled well in advance
 be documented in such a way that the different Groups
see clearly the points which pertain to their systems
 be attended by the engineers responsible of each
system
 also focus on a global system approach
TC CO July 28 2005
The findings (3)
 Controls
 The sequencer – invaluable tool
 Logging – not really operational
 Alarms – not mature but ran solidly
 Fixed displays – running from the start but needs
refinement
 e-logbook was missing
 Communication infrastructure – performed as expected
 Control room
 Noisy environment, not easy to have discussions!
 MTF has been operational from the first moment, and
proves to be very useful and necessary IN THE FIELD
TC CO July 28 2005
Conclusions



It has been a successful start of the LHC HC
We have gathered plenty of valuable information that must be
now documented and retrofitted:
 cabling
 controls
 converters
 cooling
 coordination
 environment
 inspections
 safety
We need to optimize preparations and procedures
 update the Reference Database (and drawings)
 update LHC-R-HCP-0001
 refine the procedure for high voltage tests of water-cooled
cables
 implement procedure for the water flow settings
 define procedure for the “visite d’inspection”
TC CO July 28 2005
Outlook
 In September everything we have
learnt will be applied to a larger
scale i.e. the complete set of
converters in UA83
 Every finding, every nonconformity, every new lesson must
be documented. HCC will follow
it up
 Everyone has shown great flexibility
and collaboration spirit: we must
keep it up!
TC CO July 28 2005
Ultimate currents
PC_NAME
MAGNET I_RATED_PC I_ULT_CIRCUIT I_NOM_CIRCUIT Comment
[A]
[A]
[A]
RPHH.UA83.RQ4.L8B1
RPHH.UA83.RQ4.L8B2
RPHGB.UA83.RQ5.L8B2
RPHGB.UA83.RQ5.L8B1
RPHF.UA83.RD2.L8
MQY
MQY
MQM
MQM
MBRC
RPLB.UA83.RCBCH5.L8B1
RPLB.UA83.RCBCHS5.L8B2
RPLB.UA83.RCBCHS5.L8B1
RPLB.UA83.RCBCVS5.L8B2
RPLB.UA83.RCBCVS5.L8B1
RPLB.UA83.RCBCV5.L8B2
RPLB.UA83.RCBYHS4.L8B2
RPLB.UA83.RCBYHS4.L8B1
RPLB.UA83.RCBYH4.L8B2
RPLB.UA83.RCBYVS4.L8B2
RPLB.UA83.RCBYVS4.L8B1
RPLB.UA83.RCBYV4.L8B1
MCBCH
MCBCH
MCBCH
MCBCV
MCBCV
MCBCV
MCBYH
MCBYH
MCBYH
MCBYV
MCBYV
MCBYV
RPHF.UA83.RQX.L8
RPHGC.UA83.RTQX2.L8
RPMBB.UA83.RTQX1.L8
RPHF.UA83.RD1.L8
MQXA
MQXB
MQXA
MBX
RPMBB.UA83.RCBXH2.L8
RPMBB.UA83.RCBXH3.L8
RPMBB.UA83.RCBXH1.L8
RPMBB.UA83.RCBXV1.L8
RPMBB.UA83.RCBXV2.L8
RPMBB.UA83.RCBXV3.L8
RPMBB.UA83.RQSX3.L8
RPLB.UA83.RCOSX3.L8
RPLB.UA83.RCOX3.L8
RPLB.UA83.RCSSX3.L8
RPLB.UA83.RCTX3.L8
RPLB.UA83.RCSX3.L8
MCBXH
MCBXH
MCBXH
MCBXV
MCBXV
MCBXV
MQSX
MCOSX
MCOX
MCSSX
MCTX
MCSX
TC CO July 28 2005
4000
4000
6000
6000
8000
3900
3900
4650
4650
6500
3610
3610
4310
4310
6000
120
120
120
120
120
120
120
120
120
120
120
120
80
80
80
80
80
80
77
77
77
77
77
77
74
74
74
74
74
74
72
72
72
72
72
72
8000
6000
600
8000
7000
11410
7000
6100
6450
10630
6450
5800
600
600
600
600
600
600
600
120
120
120
120
120
600
600
600
600
600
600
600
110
110
110
86
55
550
550
550
550
550
550
550
100
100
100
80
50
Magnet String operating at 4.5K
Magnet String operating at 4.5K
Magnet String operating at 4.5K
Magnet String operating at 4.5K
Magnet operating at 4.5K
Magnet operating at 4.5K
Magnet operating at 4.5K
Magnet operating at 4.5K
Magnet operating at 4.5K
Magnet operating at 4.5K
Magnet operating at 4.5K
Magnet operating at 4.5K
Magnet operating at 4.5K
Magnet operating at 4.5K
Magnet operating at 4.5K
Magnet operating at 4.5K
Magnet operating at 4.5K
Magnet operating at 1.9K
Current to be used during sc tests = 4.41kA, Magnet operating at 1.9K
Current to be used during sc tests = 600A, Magnet operating at 1.9K
Magnet operating at 1.9K
Magnet operating at 1.9K
Magnet operating at 1.9K
Magnet operating at 1.9K
Magnet operating at 1.9K
Magnet operating at 1.9K
Magnet operating at 1.9K
Magnet operating at 1.9K
Magnet operating at 1.9K
Magnet operating at 1.9K
Magnet operating at 1.9K
Magnet operating at 1.9K
Magnet operating at 1.9K