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LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
CERN Div./Group or Supplier/Contractor Document No.
TE
EDMS Document No.
874716
Date: 2009-06-16
the
Large Hadron Collider project
CERN CH-1211 Geneva 23 Switzerland
MP3 Procedure
TEST PROCEDURE AND ACCEPTANCE
CRITERIA FOR THE 600 A CIRCUITS
Abstract
This document describes the test procedure and the acceptance parameter specification
for the 600A superconducting circuits. A list of the parameters to acquire during the
tests is given.
Prepared by :
Boris Bellesia
Gert-Jan Coelingh
Robert Flora Valerie Montabonnet
Mirko Pojer Hugues Thiesen
Walter Venturini Delsolaro
Markus Zerlauth
Checked by :
Gianluigi Arduini Bernhard Auchmann
Marta Bajko
Amalia Ballarino Nuria Catalan Lasheras
Zinur Charifoulline Knud Dahlerup Petersen
Reiner Denz Giorgio D’Angelo
Glyn Kirby
Sandrine Le Naour Michele Modena
Andrea Musso David Nisbet Antonio Perin
Adriaan Rijllart Matteo Solfaroli Camillocci
Jim Strait Yves Thurel
Jean-Philip Tock
Antonio Vergara Fernandez Arjan Verweij
Rob Wolf Marco Zanetti
Approved by :
Frederick Bordry Jean-Paul Burnet
Paul Collier
Mike Lamont Steve Myers
Lucio Rossi Ruediger Schmidt
Andrzej Siemko
LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
Page 2 of 28
History of Changes
Rev. No. Date Pages Description of Changes
0.1
0.2
0.3
1.0
1.1
1.1
2.0
2007-11-14
2008-01-30
2008-04-10
2008-05-14
2009-04-22
2009-05-15
2009-06-16
All
All
All
All
All
All
All
Submission for engineering check
Submission for approval
Submission for approval
Replaces LHC-MP3-HCP-0003 v1, reviewed after first commissioning run of sector 4-5.
PLI3.c1, PLI3.d1, PLI3.e1 and PNO.c1 steps were suppressed; measurements of extraction switches are only scheduled at PNO.b1.
Approval list and variables to be stored were reviewed.
Released
New Paragraph on re-commissioning of OLD circuits
New value of TIME_PNO
I_PCC for OLD circuits to 60A
U_DIFF instead of U_RES for off-line analysis of PCS and
PNO.a3
Submission for approval
Released
LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
Page 3 of 28
Table of Contents
1. INTRODUCTION .................................................................................... 4
2. TEST CYCLE ........................................................................................... 5
3. TEST SEQUENCE .................................................................................... 6
3.1 PCC.5: CONVERTER CONFIGURATION 4Q (±I_PCC)..................................... 6
3.2 PIC2: INTERLOCK TESTS WITH CONVERTERS CONNECTED TO THE LEADS
(I_MIN_OP) ............................................................................................ 8
3.3 PCS: SPLICES VERIFICATION (±I_PCS) ................................................... 10
3.4 PLI3 INTERMEDIATE CURRENT LEVEL (+I_INTERM_2) ...................... 12 3.4.1 PLI3.B1: ENERGY EXTRACTION FROM QPS (+I_INTERM_2) .................................. 12
3.5 PNO NOMINAL CURRENT (±I_PNO) .................................................... 13 3.5.1 PNO.D3: BIPOLAR POWERING FAILURE .............................................................. 13 3.5.2 PNO.B1: ENERGY EXTRACTION FROM QPS (+I_PNO)............................................ 14 3.5.3 PNO.A3: BIPOLAR CYCLE .................................................................................. 15
3.6 FAILURE INVESTIGATION ....................................................................... 17
4. OFFLINE ANALYSIS ............................................................................. 17
4.1 PCC.5 ................................................................................................... 17
4.2 PCS (MP3) ............................................................................................ 17
4.3 PLI3 ..................................................................................................... 18 4.3.1 PLI3.B1 ENERGY EXTRACTION FROM QPS ............................................................ 18
4.4 PNO ..................................................................................................... 18 4.4.1 PNO.B1 ENERGY EXTRACTION FROM QPS ............................................................ 18 4.4.2 PNO.A3 BIPOLAR CYCLE ..................................................................................... 18
5. MTF PROFILES .................................................................................... 19
6. TEST TO BE DONE IN CASE OF A CIRCUIT RECOMMISSIONING .......... 21
APPENDIX 1: TEST PARAMETERS .................................................................. 22
APPENDIX 2: VARIABLES USED FOR ANALYSIS ............................................ 22
APPENDIX 3: VARIABLES TO BE STORED ...................................................... 24
7. REFERENCES ....................................................................................... 28
LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
Page 4 of 28
1. INTRODUCTION
In this procedure it is assumed that all previous HC steps were successfully completed
and that the circuit has been approved for powering.
Tests shall be carried out in order of increasing current and in nominal cryogenic conditions, as
defined for this type of circuits.
The entire test is made of the following steps, sorted by current level:
PCC Power converter configuration (±I_PCC)
PIC2 Interlock tests with converters connected to the leads (I_MIN_OP)
PCS Splices verification (±I_PCS)
PLI3 Intermediate current level (+I_INTERM_2):
PLI3.b1 Energy Extraction from QPS (+I_INTERM_2)
PNO Nominal current level (±I_PNO)
PNO.d3 Bipolar Powering Failure
PNO.b1 Energy Extraction from QPS (+I_PNO) (only for EE circuits)
PNO.a3 Bipolar Cycle
At the end of each step an analysis must be performed and the results approved by
all experts of the equipment involved in the test. A list of variables will then be stored in MTF
to characterise the circuit. All quenches must be recorded in MTF together with all relevant
parameters.
Throughout this procedure the following abbreviations are used:
CL: Current Leads (Responsible)
CO: CONTROL (Team)
CRYO: Cryogenics (Team)
EE: Energy Extraction
FPA: Fast power Abort
MB: Dipole Magnet
PC: Power Converter (Team)
PM: Post Mortem
QPS: Quench Protection System (Team)
PSS: Document containing the Sector Powering Specificities, see the
table below:
sector EDMS nr
1-2 883214
2-3 883231
3-4 883247
4-5 883273
5-6 883295
6-7 883317
7-8 883182
8-1 883200
LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
Page 5 of 28
2. TEST CYCLE
Figure1_ Summary of the powering tests for the 600 A circuits.
PC
LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
Page 6 of 28
3. TEST SEQUENCE
3.1 PCC.5: CONVERTER CONFIGURATION 4Q (±I_PCC)
The aim of this test is to calibrate the converter and establish the correct QPS
configuration.
Detection thresholds for QPS: 2 V for |I| < 50 A, 100 mV for |I| ≥ 50 A;
discrimination time: 20 ms.
This test shall be performed one circuit at a time for each DFB.
# Action Description Parameters Criteria
Prompt the
QPS operator
to Turn the
fast logging
ON
Need QPS operator to be
present and monitor
U_RES during step 8.
1
Converter
Hardware
Current Limit
Prompt PC to ensure the
current limit is set to the
maximum value
permitted for that
circuit.
A list of circuits and their
maximum current
settings is to be supplied
to PC.
2
Configure
power
converter
Prompt PC to check the
converter configuration.
The converter or
database configuration
may be updated as part
of this process.
The name of a SOC to be
configured, or list of
circuits if different, is to
be supplied to PC.
PC certifies that
some or all of the
converters are
configured.
3 Converter
Startup
Performance
Steps [1, 2] must be
completed.
Start the power
converter. Once in
standby, initiate a
converter fault
(FGC_STATE fault) to
create a post-mortem
event.
PM_STARTUP_PCC Verify that the
Post Mortem file
exists.
4
Flat-bottom at
I_MIN_OP
Reset the converter
maximum earth current.
Turn on the converter
and wait at least
TIME_ZERO at
I_MIN_OP.
5
Alert QPS Prompt QPS operator to
look at the detector
U_RES during next flat
top at -I_PCC_MID
6
Ramp to
-I_PCC_MID
Ramp the converter to -
I_PCC_MID at
DIDT_PNO and
ACC_PNO.
LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
Page 7 of 28
# Action Description Parameters Criteria
7
Flat-top at
-I_PCC_MID
Wait at least TIME_PCC
at -I_PCC_MID.
8
Wait for online
QPS or MMP
OK
Prompt the QPS
operator, OK button to
continue the test
U_RES Is |U_RES|<3 mV?
(QPS operator) if
not notify MP3
9
Ramp to
-I_PCC
Ramp the converter to
-I_PCC at DIDT_PNO
and ACC_PNO.
10
Flat-top1 at
-I_PCC
Wait TIME_PCC at
-I_PCC.
11
Ramp to
I_MIN_OP
Ramp the converter to
I_MIN_OP at DIDT_PNO
and ACC_PNO.
12
Ramp to
+I_PCC
Ramp the converter to
+I_PCC at DIDT_PNO
and ACC_PNO.
13
Flat-top2 at
+I_PCC
Wait TIME_PCC at
+I_PCC.
14
Ramp to
-I_PCC
Ramp the converter to
-I_PCC at DIDT_PNO
and ACC_PNO.
15
Flat-top3 at
-I_PCC
Wait TIME_PCC at
-I_PCC.
16
Ramp to
+I_PCC
Ramp the converter to
+I_PCC at DIDT_PNO
and ACC_PNO. At the
end of the ramp, obtain
the converter maximum
earth current.
Obtain the converter
maximum absolute
current error.
I_EARTH_PCC
I_ERR_PCC
I_EARTH_MAX
I_ERR_MAX_PCC
17 Flat-top4 at
+I_PCC
Wait TIME_CROWBAR at
+I_PCC.
18 Crowbar at
positive
current
Activate the crowbar by
setting a converter
power failure
(FGC_STATE fault).
Record the name of the
post-mortem file that is
created.
PM_CROWBAR_PCC_POS Verify that the
Post Mortem file
exists
19 Wait for
current decay
and
generation of
Post-Mortem
data
Wait until the following
conditions are true:
1. PC state is
FAULT_OFF
2. TIME_ACTIVATION
has passed
3.PM file exists
4. I_MEAS < 1A
I_DCCT
I_MEAS
U_DIFF
LD1:U_HTS
LD2:U_HTS
LD1:U_RES
LD2:U_RES
20 Re-arm QPS Ask QPS to rearm if a
QPS trigger has occurred
LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
Page 8 of 28
# Action Description Parameters Criteria
21 Ramp to
-I_PCC
Start the converter and
ramp to -I_PCC at
DIDT_PNO and
ACC_PNO.
22 Flat-top5 at
-I_PCC
Wait TIME_CROWBAR at
-I_PCC.
23 Crowbar at
negative
current
Activate the crowbar by
setting a converter
power failure
(FGC_STATE fault).
Record the name of the
post-mortem file that is
created.
PM_CROWBAR_PCC_NEG Verify that the
Post Mortem file
exists.
24 Wait for
current decay
and
generation of
Post-Mortem
data
Wait until the following
conditions are true:
1. PC state is
FAULT_OFF
2. TIME_ACTIVATION
has passed
3. PM file exists
4. I_MEAS < 1A
I_DCCT
I_MEAS
U_DIFF
LD1:U_HTS
LD2:U_HTS
LD1:U_RES
LD2:U_RES
25 Re-arm QPS Ask QPS to rearm if a
QPS trigger has occurred
PC Analysis
(crowbar)
A PC technician shall be
requested to make an
offline analysis of the
converter crowbar
performance with
positive and negative
current.
See [1].
PCC_CROWBAR_RESULT PASS / FAIL
QPS OK QPS team has to
validate the
performance of the EE
system during PCC
PASS/FAIL
3.2 PIC2: INTERLOCK TESTS WITH CONVERTERS CONNECTED TO THE LEADS (I_MIN_OP)
The current for PIC2 is equal to I_MIN_OP.
The test descriptions given in this section have been added for the sake of completeness only.
The detailed procedures for implementation of the interlock tests are subject to two dedicated
document that will remain the reference for these tests (LHC-CI-TP-0001-10-00, LHC-D-HCP-
0002).
Required approval from:
TEST_PLAN_NAME HWC_PC_EXPERT HWC_QPS_EXPERT HWC_MI_EXPERT HWC_MP3_EXPERT
PCC.5 YES YES NO NO
LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
Page 9 of 28
Step Action Description Output Variables Criteria
1 Test software link (PIC-Cryo)
Test the correct communication of CRYO_START between
the CRYO supervision and the PIC supervision
Confirmation by CO expert.
2 Tests software link (PIC-QPS)
Test the correct communication of QPS_OK between the
QPS supervision and the PIC supervision
Confirmation by CO expert.
3 PC Permit Give PC Permit, reset the power converter and remove the PC Permit signal.
Reaction time of interlock system <= 4ms
PC Permit is received by the power converter. Confirmation by
CO expert.
4 Powering Failure
Ramp the current to I_MIN_OP and trigger a powering failure.
Reaction time of interlock system <= 4ms
Powering failure is received by the PIC and circuit is
switched off with a slow abort. Confirmation by CO expert.
5 Circuit Quench via QPS
Ramp the current to I_MIN_OP and ask the
QPS expert to simulate a quench signal for the circuit.
Reaction time of interlock system <= 4ms
Quench signal is received by the
PIC and circuit is switched off with a fast power abort. EE switches open.
Confirmation by
QPS and CO expert.
6 Fast Abort Request via PIC
Ramp the current to I_MIN_OP and ask the PIC expert to trigger a
fast power abort request for the circuit.
Reaction time of interlock system <= 4ms
Circuit is switched off with a fast power
abort. EE switches open. Confirmation by QPS and CO expert.
7 Test Hardware links
Confirm that all external HW links to UPS and AUG have been tested.
Confirmation by CO expert.
Required approval from:
TEST_PLAN_NAME HWC_PC_EXPERT HWC_QPS_EXPERT HWC_PIC_EXPERT HWC_MP3_EXPERT
PIC2 CRYO-OK NO NO YES NO
PIC2 QPS-OK NO NO YES NO
PIC2 PC PERMIT NO NO YES NO
PIC2 POWERING FAILURE NO NO YES NO
PIC2 CIRCUIT QUENCH VIA QPS NO YES YES NO
PIC2 FAST ABORT REQ VIA PIC NO YES YES NO
PIC2 TEST HW LINKS NO NO YES NO
LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
Page 10 of 28
3.3 PCS: SPLICES VERIFICATION (±I_PCS)
This test is to verify the low-current integrity of the splices.
NOTA BENE: This test must be analysed by MP3 with the PCS Analysis Tool in the PM
Event Analyser, to automatically transfer data to MTF
# Action Description Parameters Criteria
Prompt the QPS
operator to Turn
the fast logging
ON
1 Flat-bottom at
I_MIN_OP
Reset the converter
maximum earth current.
Turn on the converter
and wait at least
TIME_ZERO at
I_MIN_OP.
2 Ramp to
+I_PCS_MID
Ramp the current to
+I_PCS_MID at
DIDT_PCS_LOW and
ACC_PCS. At the end of
the ramp, reset the
converter maximum
absolute current error.
U_RES I_DCCT I_MEAS U_DIFF I_DIDT
3 Flat-top at
+I_PCS_MID
Wait TIME_PCS_MID at
+I_ PCS_MID.
U_RES I_DIDT I_DCCT I_MEAS
4 Ramp to +I_PCS
Ramp the current to
+I_PCS at DIDT_PCS
and ACC_PCS.
5
Flat-top at
+I_PCS
Reset the converter
maximum earth current.
Wait TIME_PCS at
+I_ PCS.
After waiting, acquire the
converter maximum
earth current and the
converter maximum
absolute current error.
I_EARTH_PCS_POS I_ERR_PCS_POS U_RES I_DIDT I_DCCT I_MEAS
I_EARTH_MAX
I_ERR_MAX
6 Ramp to
I_MIN_OP
Ramp the current to
I_MIN_OP at DIDT_PNO
and ACC_PNO.
7 Flat-bottom at
I_MIN_OP
Wait TIME_ZERO at
I_MIN_OP.
Acquire the converter
maximum absolute
current error.
I_ERR_PCS_POS_RMP I_ERR_MAX
8 End of positive
cycle
Initiate a converter fault
(FGC_STATE fault) to
create a post-mortem
event.
PM_CYCLE_PCS_POS Verify that the
Post Mortem
files exist.
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Page 11 of 28
# Action Description Parameters Criteria
9 Flat-bottom at
I_MIN_OP
Reset the converter
maximum earth current.
Turn on the converter
and wait at least
TIME_ZERO at
I_MIN_OP.
10 Ramp to
-I_PCS_MID
Ramp the current to
-I_PCS_MID at
DIDT_PCS_LOW and
ACC_PCS.
At the end of the ramp,
reset the converter
maximum absolute
current error.
11 Flat-top at
-I_PCS_MID
Wait TIME_PCS at
-I_ PCS_MID.
U_RES I_DIDT I_DCCT I_MEAS
12 Ramp to
-I_PCS
Ramp the current to
-I_PCS at DIDT_PCS and
ACC_PCS.
13 Flat-top at
-I_PCS
Reset the converter
maximum earth current.
Wait TIME_PCS at
-I_ PCS.
After waiting, acquire the
converter maximum
earth current and the
converter maximum
absolute current error.
I_EARTH_PCS_NEG I_ERR_PCS_NEG U_RES I_DIDT I_DCCT I_MEAS
I_EARTH_MAX
I_ERR_MAX
14 Ramp to
-I_MIN_OP
Ramp the current to
-I_MIN_OP at DIDT_PCS
and ACC_PCS.
Acquire the converter
maximum absolute
current error.
I_ERR_PCS_NEG_RMP I_ERR_MAX
15 End of negative
cycle
Initiate a converter fault
(FGC_STATE fault) to
create a post-mortem
event
PM_CYCLE_PCS_NEG Verify that the
Post Mortem
files exist.
MP3 Analysis Offline Analysis PASS / FAIL
Required approval from:
TEST_PLAN_NAME HWC_PC_EXPERT HWC_QPS_EXPERT HWC_PIC_EXPERT HWC_MP3_EXPERT
PCS NO NO NO YES
LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
Page 12 of 28
3.4 PLI3 INTERMEDIATE CURRENT LEVEL (+I_INTERM_2)
3.4.1 PLI3.B1: ENERGY EXTRACTION FROM QPS (+I_INTERM_2)
This test is for checking the performance of the QPS and the EE systems.
Only done for circuits with Energy Extraction, in case the EE equipment has not been
commissioned before, this step needs the EE team to be in the tunnel and take measurements.
To be organised for group of circuits in function of tunnel locations.
This test corresponds to the Energy Extraction from QPS test described in LHC-MPP-HCP-
0001.
# Action Description Parameters Criteria
1 Flat-bottom at
I_MIN_OP
Turn on the converter
and wait at least
TIME_ZERO at
I_MIN_OP.
2 Ramp to
+I_INTERM_2
Ramp the current to
+I_INTERM_2 at
DIDT_PNO and
ACC_PNO.
3 Flat-top at
+I_INTERM_2
Wait at least TIME_
CROWBAR at
+I_INTERM_2.
4 Open Energy
Extraction Switch
Send quench signal from
QPS
5 Wait for current
decay and
generation of
Post-Mortem
data
PM_EE_PLI3_B1
I_DCCT
I_MEAS
U_DIFF
LD1:U_HTS
LD2:U_HTS
LD1:U_RES
LD2:U_RES
Verify that
the Post
Mortem files
exist.
6 PC Analysis
(Crowbar)
A PC Technician shall be
requested to make an
offline analysis of ramp-
down performance from
+I_INTERM_2.
See [1].
PLI3_B1_EE_RESULT
PASS / FAIL
QPS Analysis PASS / FAIL
OK from QPS
Required approval from:
TEST_PLAN_NAME HWC_PC_EXPERT HWC_QPS_EXPERT HWC_PIC_EXPERT HWC_MP3_EXPERT
PL3.B1 YES YES NO NO
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Page 13 of 28
3.5 PNO NOMINAL CURRENT (±I_PNO)
It is possible that one or more training quenches will occur during ramp-up at
some current level below I_PNO. If a quench occurs, then the test is
considered as failed. In this case MP3 will decide to repeat the test with the
same or with a modified current level. Before repeating the test, the approval
of MP3 is required.
3.5.1 PNO.D3: BIPOLAR POWERING FAILURE
This test is to verify the correct functionality of the PC when a powering failure is
generated.
# Action Description Parameters Criteria
1 Flat-bottom at
I_MIN_OP
Reset the converter
maximum earth current.
Turn on the converter
and wait at least
TIME_ZERO at I_MIN_OP
2 Ramp to +I_PNO Ramp the current to
+I_PNO at DIDT_PNO
and ACC_PNO.
First powering to nominal
current; may have
training quenches
I_DCCT
I_MEAS
U_DIFF
LD1:U_HTS
LD2:U_HTS
LD1:U_RES
LD2:U_RES
3 Flat-top at
+I_PNO
Wait at least
TIME_CROWBAR at
+I_PNO.
4 Simulate a
Powering Failure
Make the PC simulate a
powering failure
(FGC_STATE fault).
5 Wait for current
decay and
generation of
Post-Mortem
data
Wait until the following
conditions are true:
1. PC state is FAULT_OFF
2. TIME_ACTIVATION has
passed
3. PM files exist
4. I_MEAS < 1A
PM_PWR_FAIL_PNO_D3_
POS
I_DCCT
I_MEAS
U_DIFF
LD1:U_HTS
LD2:U_HTS
LD1:U_RES
LD2:U_RES
Verify that
the Post
Mortem files
exist.
6 Re-arm QPS Ask QPS to rearm if a
QPS trigger has occurred.
7 Ramp success Previous step must
complete successfully,
otherwise stop the test.
8 Flat-bottom at
I_MIN_OP
Reset the converter
maximum earth current.
Turn on the converter
and wait at least
TIME_ZERO at I_MIN_OP
LHC Project Document No.
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Page 14 of 28
# Action Description Parameters Criteria
9 Ramp to
-I_PNO
Ramp the current to
-I_PNO at DIDT_PNO and
ACC_PNO
10 Flat-top at
-I_PNO
Wait at least
TIME_ CROWBAR at
-I_PNO
11 Simulate a
Powering Failure
Make the PC simulate a
powering failure
(FGC_STATE fault).
12 Wait for current
decay and
generation of
Post-Mortem
data
Wait until the following
conditions are true:
1. PC state is FAULT_OFF
2. TIME_ACTIVATION has
passed
3. PM file exists
4. I_MEAS < 1A
PM_PWR_FAIL_PNO_D3_
NEG
I_DCCT
I_MEAS
U_DIFF
LD1:U_HTS
LD2:U_HTS
LD1:U_RES
LD2:U_RES
Verify that
Post Mortem
files exist
13 Re-arm QPS Ask QPS to rearm if a
QPS trigger has occurred.
PC Analysis
(Crowbar)
A PC technician shall be
requested to make an
offline analysis of the
converter crowbar
performance with positive
and negative current.
See [1].
PNO_D3_PWR_FAIL_RES
ULT
PASS / FAIL
3.5.2 PNO.B1: ENERGY EXTRACTION FROM QPS (+I_PNO)
This test is for checking, at high current level, the performance of the QPS and the EE
systems.
This test corresponds to the Energy Extraction from QPS test described in LHC-MPP-HCP-
0001. No intervention of EE team in the tunnel to take measurements is foreseen.
# Action Description Parameters Criteria
1 Flat-bottom at
I_MIN_OP
Turn on the converter
and wait at least
TIME_ZERO at
I_MIN_OP.
2 Ramp to
+I_PNO
Ramp the current to
+I_PNO at DIDT_PNO
and ACC_PNO.
Required approval from:
TEST_PLAN_NAME HWC_PC_EXPERT HWC_QPS_EXPERT HWC_PIC_EXPERT HWC_MP3_EXPERT
PNO.D3 YES NO NO YES
LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
Page 15 of 28
# Action Description Parameters Criteria
3 Flat-top at
+I_PNO
Wait at least TIME_
CROWBAR at +I_PNO.
4 Open Energy
Extraction
Switch
Send quench signal from
QPS
5 Wait for current
decay and
generation of
Post-Mortem
data
PM_EE_PNO_B1_POS
I_DCCT
I_MEAS
U_DIFF
LD1:U_HTS
LD2:U_HTS
LD1:U_RES
LD2:U_RES
Verify that
the Post
Mortem files
exist.
PC Analysis A PC Technician shall be
requested to make an
offline analysis of ramp-
down performance with
positive current.
See [1].
PNO_B1_EE_RESULT PASS / FAIL
QPS Analysis PASS / FAIL
3.5.3 PNO.A3: BIPOLAR CYCLE
This test is to verify the correct functionality of magnet and Current Leads at nominal
current level as well as the high-current integrity of the splices.
NOTA BENE: This test must be analysed by MP3 with the PCS Analysis Tool in the PM
Event Analyser, to automatically transfer data to MTF
# Action Description Parameters Criteria
1 Prompt QPS QPS fast logging active
2 Flat-bottom
at I_MIN_OP
Reset the converter
maximum earth current.
Turn on the converter
and wait at least
TIME_ZERO at
I_MIN_OP.
3 Ramp to
+I_PCC
Ramp the current to
+I_PCC at DIDT_PNO
and ACC_PNO. At the
end of the ramp, reset
the converter maximum
absolute current error.
U_RES I_DIDT
Required approval from:
TEST_PLAN_NAME HWC_PC_EXPERT HWC_QPS_EXPERT HWC_PIC_EXPERT HWC_MP3_EXPERT
PNO.B1 NO YES NO NO
LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
Page 16 of 28
# Action Description Parameters Criteria
4 Flat-top at
+I_PCC
Wait TIME_PCC at
+I_ PCC.
U_RES I_DIDT
5 Ramp to
+I_PNO
Ramp the current to
+I_PNO at DIDT_PNO
and ACC_PNO.
6 Flat-top at
I_PNO
Reset the converter
maximum earth current.
Wait at least
TIME_PNO_CL at
+I_PNO.
After waiting, acquire the
converter maximum
earth current and the
converter maximum
absolute current error.
I_EARTH_PNO_A3_POS I_ERR_PNO_A3_POS U_RES I_DIDT
I_EARTH_MAX
I_ERR_MAX
7 Ramp to
I_MIN_OP
Ramp the current to
I_MIN_OP at DIDT_PNO
and ACC_PNO.
8 Flat-bottom
at I_MIN_OP
Wait TIME_ZERO at
I_MIN_OP.
Acquire the converter
maximum absolute
current error.
I_ERR_PNO_A3_POS_RMP
9 End of
positive cycle
Initiate a converter fault
(FGC_STATE fault) to
create a post-mortem
event.
PM_CYCLE_PNO_A3_POS Verify that the
Post Mortem
files exist.
10 Flat-bottom
at I_MIN_OP
Reset the converter
maximum earth current.
Turn on the converter
and wait at least
TIME_ZERO at
I_MIN_OP.
11 Ramp to
-I_PCC
Ramp the current to
-I_PCC at DIDT_PNO and
ACC_PNO. At the end of
the ramp, reset the
converter maximum
absolute current error.
U_RES I_DIDT
12 Flat-top at
-I_PCC
Wait TIME_PCC at
-I_ PCC.
U_RES I_DIDT
13 Ramp to
-I_PNO
Ramp the current to
-I_PNO at DIDT_PNO and
ACC_PNO.
14 Flat-top at
-I_PNO
Reset the converter
maximum earth current.
Wait at least TIME_PNO
at -I_PNO.
After waiting, acquire the
converter maximum
earth current and the
converter maximum
I_EARTH_PNO_A3_NEG
I_ERR_PNO_A3_NEG
U_RES
I_DIDT
I_EARTH_MAX
I_ERR_MAX
LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
Page 17 of 28
# Action Description Parameters Criteria
absolute current error.
15 Ramp to
I_MIN_OP
Ramp the current to
I_MIN_OP at DIDT_PNO
and ACC_PNO.
16 Flat-bottom
at I_MIN_OP
Wait TIME_ZERO at
I_MIN_OP.
Acquire the converter
maximum absolute
current error.
I_ERR_PNO_A3_NEG_RM
P
17 End of
negative
cycle
Initiate a converter fault
(FGC_STATE fault) to
create a post-mortem
event.
PM_CYCLE_PNO_A3_NEG Verify that the
Post Mortem
files exist.
MP3 Analysis PASS / FAIL
3.6 FAILURE INVESTIGATION
If the test fails, the failure should be reported to the EIC, who will consult Power Converter
and/or MP3 specialists to decide on the best action. It may be necessary to proceed with
further investigations to find the source of the failure. If the failure is significant, the EIC
should open an NC (non conformity), or ensure the specialist concerned opens an NC.
4. OFFLINE ANALYSIS
To be completed by PC, QPS, EE, CL and MP3 experts.
4.1 PCC.5
The offline analysis of PCC is performed by PC experts.
4.2 PCS (MP3)
The offline analysis steps of PCS are added for completeness. An automatic tool is
available to perform the analysis.
Step Action Description Parameters Criteria
1 Capture resistive
voltage and current at
+I_PCS_MID
Measurement DB,
(timestamps from
the FGC PM files)
VMID+=<U_DIFF>
IMID=<I_MEAS>
VMID+< 2 mV
Required approval from:
TEST_PLAN_NAME HWC_PC_EXPERT HWC_QPS_EXPERT HWC_PIC_EXPERT HWC_MP3_EXPERT
PNO.A3 NO NO NO YES
LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
Page 18 of 28
2 As above at +I_PCS Same as step 1 VPCS+=<U_DIFF>
IPCS=<I_MEAS>
VPCS+< 2 mV
3 Capture resistive
voltage at –I_PCS_MID
Same as step 1 VMID- =<U_DIFF> VMID
- < 2 mV
|I_MEAS+IMID|< 5 10
-4 A
4 Capture resistive
voltage at –I_PCS
Same as step 1 VPCS- = <U_DIFF>
VPCS
- < 2 mV
|I_MEAS+IPCS|< 5 10
-4 A
5 Compute offset-free
voltage at I_PCS_MID
and equivalent
resistance
VMID= (VMID+-
VMID-)/2
RMID=VMID/IMID
RMID RMID< 5 µΩ
6 Compute offset-free
voltage at I_PCS and
equivalent resistance
VPCS= (VPCS+-
VPCS-)/2
RPCS=VPCS/IPCS
RPCS RPCS < 5 µΩ |RMID-RPCS| < 0.5 µΩ
7 QPS current error |I_DCCT - I_MEAS| ERR_IQPS < 1 A
4.3 PLI3
4.3.1 PLI3.B1 ENERGY EXTRACTION FROM QPS
Step Action Description Parameters Criteria
1 Check
discharge
2 Measure
voltage
Detailed extraction
voltage measured in situ Data file
4.4 PNO
4.4.1 PNO.B1 ENERGY EXTRACTION FROM QPS
Step Action Description Parameters Criteria
1 Check
discharge
4.4.2 PNO.A3 BIPOLAR CYCLE
Step Action Description Parameters Criteria
1 From PM Catch resistive voltage at
I nominal
VPNO+
=<U_DIFF>
LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
Page 19 of 28
VPNO- =<U_DIFF>
2 Compute:
VPNO= (VPNO
+-
VPNO-)/2
Offset-free voltage at
IPNO
Equivalent resistance
----U_DIFF ---I_DCCT RPNO=VPNO/IPNO N number of splices
RPNO/N < 5 µΩ |RPNO-RPCS| < 0.5 µΩ
5. MTF PROFILES
600A Circuits with Energy Extraction
00-MP3 OK to Start Powering
091-HCA PCL Current Leads Verification
099-HCA PCC.5 Converter Configuration 4Q 600A
10-HCA PIC2.1 Tests Software Link (PIC-Cryo)
11-HCA PIC2.2 Tests Software Link (PIC-QPS)
12-HCA PIC2.3 PC Permit
13-HCA PIC2.4 Powering Failure
14-HCA PIC2.5 Circuit_Quench via QPS
15-HCA PIC2.6 Fast_Abort_Request via PIC
19-HCA PIC2.10 Test Hardware Links
20-HCA PCS Splices Verification
511-HCA PLI3.b1 Energy Extraction from QPS 600A
733-HCA PNO.d3 Bipolar Powering Failure 600A
711-HCA PNO.b1 Energy Extraction from QPS 600A
703-HCA PNO.a3 Bipolar Cycle 600A I_PNO
18-HCA PIC2.9 Test Global Protection Mech.
998-HCA PTT Circuit Type Test
9985-HCA PCR Circuit Released by PC
9986-HCA PCR Circuit Released by QPS/EE
999-HCA PCR Circuit Released
600A Circuits without Energy Extraction
00-MP3 OK to Start Powering
091-HCA PCL Current Leads Verification
099-HCA PCC.5 Converter Configuration 4Q 600A
10-HCA PIC2.1 Tests Software Link (PIC-Cryo)
11-HCA PIC2.2 Tests Software Link (PIC-QPS)
12-HCA PIC2.3 PC Permit
13-HCA PIC2.4 Powering Failure
14-HCA PIC2.5 Circuit_Quench via QPS
15-HCA PIC2.6 Fast_Abort_Request via PIC
19-HCA PIC2.10 Test Hardware Links
LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
Page 20 of 28
20-HCA PCS Splices Verification
733-HCA PNO.d3 Bipolar Powering Failure 600A
703-HCA PNO.a3 Bipolar Cycle 600A I_PNO
18-HCA PIC2.9 Test Global Protection Mech.
998-HCA PTT Circuit Type Test
9985-HCA PCR Circuit Released by PC
9986-HCA PCR Circuit Released by QPS/EE
999-HCA PCR Circuit Released
600A Circuits without Energy Extraction, crowbar
00-MP3 OK to Start Powering
091-HCA PCL Current Leads Verification
099-HCA PCC.5 Converter Configuration 4Q 600A
10-HCA PIC2.1 Tests Software Link (PIC-Cryo)
11-HCA PIC2.2 Tests Software Link (PIC-QPS)
12-HCA PIC2.3 PC Permit
13-HCA PIC2.4 Powering Failure
14-HCA PIC2.5 Circuit_Quench via QPS
15-HCA PIC2.6 Fast_Abort_Request via PIC
19-HCA PIC2.10 Test Hardware Links
20-HCA PCS Splices Verification
733-HCA PNO.d3 Bipolar Powering Failure 600A
703-HCA PNO.a3 Bipolar Cycle 600A I_PNO
18-HCA PIC2.9 Test Global Protection Mech.
998-HCA PTT Circuit Type Test
9985-HCA PCR Circuit Released by PC
9986-HCA PCR Circuit Released by QPS/EE
999-HCA PCR Circuit Released
LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
Page 21 of 28
6. TEST TO BE DONE IN CASE OF A CIRCUIT RECOMMISSIONING
After a shut-down, each circuit will be defined as NEW or UNAFFECTED, according to its
status at the end of the previous campaign and to the interventions carried out during the
shut-down activity. A circuit, which was already commissioned during the previous
commissioning campaign, is considered UNAFFECTED when no electrical modification
(equipment change or upgrade) has been performed, no bus line has been touched or no
conformity has been discovered. A circuit which was not fully commissioned during the
previous campaign or which is not included in the previous category is considered as
NEW.
The list of circuits belonging to the two categories will be included in ad-hoc documents to
be edited at the end of each shut-down (EDMS no. 1001967).
In case of a NEW circuit the commissioning procedure is the one described above.
A circuit labeled as UNAFFECTED is considered commissioned and a reduced re-
qualification campaign must be performed.
The tests that are meant to re-qualify an UNAFFECTED labeled circuit are (see Figure2):
- Power Converter Configuration (PCC) tests (the current to be used is in this case 60A
instead of 50A, used for a “NEW” circuit, in order to ensure the activation of the crow-
bar of the power converter);
- PIC2 tests;
- PCS at I_PCS, to re-check the splices;
- PNO.b1 (for circuits with EE) and PNO.a3 at I_PNO.
Figure 2_ Reduced commissioning procedure for “UNAFFECTED” circuits.
PC
LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
Page 22 of 28
APPENDIX 1: TEST PARAMETERS
The following parameters are valid for all circuits unless otherwise noted in the list of
exceptions.
Parameter Value Unit Description
I_MIN_OP 0 A Minimum operational current
I_PCC_MID 10 A Intermediate current used in PCC
I_PCC 45 A Maximum current used in PCC
I_PCS_MID 80 A Intermediate current used in PCS
I_PCS 200 A Maximum current used in PCS
I_INTERM_2 200 A Intermediate current used in PLI3 tests
I_PNO # A Nominal commissioning current of the circuit
under test
TIME_ZERO 30 s Time for the flat-tops at I_MIN_OP
TIME_PCC 10 s Time for the flat-tops at I_PCC
TIME_PCS 240 s Time for the flat-tops at I_PCS
TIME_PCS_MID 240 s Time for the flat-tops at I_PCS_MID
TIME_CROWBAR 2 s Time interval at plateau before triggering a
test involving the crowbar
TIME_ACTIVATION Layout DB > 3{L/(R + Rcrowbar)}
s Time for the current decay in PLI3.D1 and
PNO.D1
TIME_PNO 1500 s Time for the flat-tops at I_PNO
TIME_PNO_CL 3600 s Time at I_PNO to check current leads
DIDT_PCS_LOW 1 A/s Low current ramp rate used in PCS
DIDT_PCS 5 A/s Maximum current ramp rate used in PCS
DIDT_PNO 5 A/s Nominal current ramp rate
ACC_PCS 0.1 A/s2 Current acceleration used in PCS
ACC_PNO 0.1 A/s2 Nominal current acceleration
ACC_RED 0.02 A/s2 Reduced current acceleration*
I_EARTH_MAX 10 mA Maximum earth current for the criteria
I_ERR_MAX_PCC 360
(600)
mA
(ppm)
Maximum current regulation error for the
criteria during PCC
I_ERR_MAX 18
(30)
mA
(ppm)
Maximum current regulation error for the
criteria in PCS and PNO
#Values according to the PSS documents
* Reduced current acceleration to be applied in case of anomalies in the inductance
APPENDIX 2: VARIABLES USED FOR ANALYSIS
The table below refers to the RCS.A78.B1 circuit as an example. Parameter names can be
found for any circuit in the Layout database, the suffixes being the same for all signals with the
same significance.
Description Parameter name Source Power converter current
measurement of
RPMBB.UA83.RCS.A78B1
RPMBB.UA83.RCS.A78B1:I_MEAS
PM (POW)
FGC
LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
Page 23 of 28
Power converter voltage
measurement of
RPMBB.UA83.RCS.A78B1
RPMBB.UA83.RCS.A78B1:V_MEAS
PM
FGC
Power converter maximum current
regulation error of
RPMBB.UA83.RCS.A78B1
RPMBB.UA83.RCS.A78B1:
ILOOP.MAX_ABS_ERR FGC
Power Converter maximum ground
current on load side of
RPMBB.UA83.RCS.A78B1
RPMBB.UA83.RCS.A78B1:
MEAS.MAX_I_EARTH FGC
Power Converter faults of
RPMBB.UA83.RCS.A78B1
RPMBB.UA83.RCS.A78B1:
FGC2.FAULTS FGC
Calculated resistive voltage of
RCS.A78B1
RCS.A78B1:U_RES
PM (QPS)
Voltage across corrector's circuit of
RCS.A78B1
RCS.A78B1:U_DIFF
PM (QPS)
Current slope of RCS.A78B1
RCS.A78B1:I_DIDT
PM (QPS)
Current in the circuit of RCS.A78B1
RCS.A78B1:I_DCCT
PM (QPS)
HTS part current lead of
DFLBS.6L8.RCS.A78B1.LD1
DFLBS.6L8.RCS.A78B1.LD1:U_HTS
PM (QPS)
Resistive part current lead of
DFLBS.6L8.RCS.A78B1.LD1
DFLBS.6L8.RCS.A78B1.LD1:U_DIFF
PM (QPS)
HTS part current lead of
DFLBS.6L8.RCS.A78B1.LD2
DFLBS.6L8.RCS.A78B1.LD2:U_HTS
PM (QPS)
Resistive part current lead of
DFLBS.6L8.RCS.A78B1.LD2
DFLBS.6L8.RCS.A78B1.LD2:U_DIFF
PM (QPS)
Temperature of the warm part of
the HTS TT891
Temperature of the warm part of
the lead TT893
Liquid helium level in the DFB
Valve opening for each lead CV891
LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
Page 24 of 28
APPENDIX 3: VARIABLES TO BE STORED
Parameter Unit Analysis
Source Description Test
To be
filled by
TEST_PROCEDURE_VERSION Text /
hyperlink Offline
EDMS version
number of the test
procedure applied.
None MP3
PM_STARTUP_PCC
Text /
hyperlink
Online
Postmortem
filename of PC
startup sequence. PCC.1 PMA
I_EARTH_PCC A Online
Max earth current
measured during
PCC. PCC.1 Sequencer
I_ERR_PCC A Online
Max error between
current reference
and measured
current during
PCC, acquired
continuously by
the PC at the
speed of the
current loop.
PCC.1 Sequencer
PM_CROWBAR_PCC_POS
Text /
hyperlink
Online
Postmortem
filename of
POSitive current
PCC crowbar
activation.
PCC.1 PMA
PM_CROWBAR_PCC_NEG
Text /
hyperlink
Online
Postmortem
filename of
NEGative current
PCC crowbar
activation.
PCC.1 PMA
I_EARTH_PCS_POS A Online
Max earth current
measured during
PCS POSitive
ramp.
PCS Sequencer
I_ERR_PCS_POS A Online
Max error between
current reference
and measured
current during PCS
POSitive cycle,
acquired
continuously by
the PC at the
speed of the
current loop
PCS Sequencer
LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
Page 25 of 28
Parameter Unit Analysis
Source Description Test
To be
filled by
I_ERR_PCS_POS_RMP A Online
Max error between
current reference
and measured
current during
NEGative ramp at
the end of PCS
POSitive cycle ,
acquired
continuously by
the PC at the
speed of the
current loop
PCS Sequencer
PM_CYCLE_PCS_POS
Text /
hyperlink
Online
Postmortem
filename of
POSitive current
cycle during PCS.
PCS PMA
I_EARTH_PCS_NEG A Online
Max earth current
measured during
PCS NEGative
ramp.
PCS Sequencer
I_ERR_PCS_NEG A Online
Max error between
current reference
and measured
current during PCS
NEGative cycle,
acquired
continuously by
the PC at the
speed of the
current loop
PCS Sequencer
I_ERR_PCS_NEG_RMP A Online
Max error between
current reference
and measured
current during
POSitive ramp at
the end of PCS
NEGative cycle ,
acquired
continuously by
the PC at the
speed of the
current loop
PCS Sequencer
PM_CYCLE_PCS_NEG
Text /
hyperlink
Online
Postmortem
filename of
NEGative current
cycle during PCS.
PCS PMA
PM_EE_PLI3_B1
Text /
hyperlink
Online
Postmortem
filename of
POSitive Current
Energy Extraction
activation during
PLI3
PLI3.B1 PMA
LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
Page 26 of 28
Parameter Unit Analysis
Source Description Test
To be
filled by
PLI3_B1_EE_RESULT
Text /
hyperlink
Offline
Result of the OFF
line analysis of
POSitive Current
Energy Extraction
activation during
PLI3
PLI3.C1 EE
PM_PWR_FAIL_PNO_D3_POS
Text /
hyperlink
Online
Postmortem
filename of
POSitive Current
Powering Failure
activation during
PNO
PNO.D3 PMA
PM_PWR_FAIL_PNO_D3_NEG
Text /
hyperlink
Online
Postmortem
filename of
NEGative Current
Powering Failure
activation during
PNO
PNO.D3 PMA
PM_EE_PNO_B1_POS
Text /
hyperlink
Online
Postmortem
filename of
POSitive Current
Energy Extraction
activation during
PNO
PNO.B1 PMA
PNO_B1_EE_RESULT
Text /
hyperlink
Offline
Result of the OFF
line analysis of t
Energy POSitive
Current Extraction
activation during
PNO
PNO.B1 EE
I_EARTH_PNO_A3_POS
A Online
Max earth current
measured during
PNO POSitive
ramp.
PNO.A3 Sequencer
I_ERR_PNO_A3_POS
A Online
Max error between
current reference
and measured
current during PNO
POSitive cycle,
acquired
continuously by
the PC at the
speed of the
current loop
PNO.A3 Sequencer
LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
Page 27 of 28
Parameter Unit Analysis
Source Description Test
To be
filled by
I_ERR_PNO_A3_POS_RMP A Online
Max error between
current reference
and measured
current during
NEGative ramp at
the end of PNO.A3
POSitive cycle ,
acquired
continuously by
the PC at the
speed of the
current loop
PNO.A3 Sequencer
PM_CYCLE_PNO_A3_POS Text /
hyperlink
Online
Postmortem
filename of
POSitive current
cycle during PNO.
PNO.A3 PMA
I_EARTH_PNO_A3_NEG
A Online
Max earth current
measured during
PNO NEGative
ramp.
PNO.A3 Sequencer
I_ERR_PNO_A3_NEG
A Online
Max error between
current reference
and measured
current during PNO
NEGative cycle,
acquired
continuously by
the PC at the
speed of the
current loop
PNO.A3 Sequencer
I_ERR_PNO_A3_NEG_RMP A Online
Max error between
current reference
and measured
current during
POSitive ramp at
the end of PNO.A3
NEGative cycle ,
acquired
continuously by
the PC at the
speed of the
current loop
PNO.A3 Sequencer
PM_CYCLE_PNO_A3_NEG Text /
hyperlink
Online
Postmortem
filename of
negative current
cycle during PNO.
PNO.A3 PMA
VMID+ V offline Resistive voltage at
+I_PCS_MID PCS MP3
VMID- V offline Resistive voltage at
–I_PCS_MID PCS MP3
VPCS+ V offline Resistive voltage at
+I_PCS PCS MP3
LHC Project Document No.
LHC-MPP-HCP-0003 ver. 2.0
Page 28 of 28
Parameter Unit Analysis
Source Description Test
To be
filled by
VPCS- V offline Resistive voltage at
–I_PCS PCS MP3
VPNO+ V offline Resistive voltage at
+I_PNO PNO.A3 MP3
VPNO- V offline Resistive voltage at
–I_PNO PNO.A3 MP3
RMID Ω offline
Splice equivalent
resistance at
I_PCS_MID
PCS MP3
RPCS Ω offline Splice equivalent
resistance at I_PCS PCS MP3
RPNO Ω offline
Splice equivalent
resistance at
I_PNO
PCS MP3
I_COMMISSIONED A Offline
Current value at
which I_PNO is
completed
HCA PCR
Circuit
Released
MP3
*Only for circuits with Energy Extraction
The following table contains parameters to be stored in case a quench has happened by means
of an attached file to the MTF record.
Parameter Unit Analysis
Source Description Test
To be
filled by
MIITS_Q1 A2 s offline MIITS integral first
quench
ANY MP3
VMAX_Q1, V offline Maximum voltage
first quench
ANY MP3
… Q2 s, A2 s ,V offline ANY MP3
…Q3 s, A2 s ,V offline ANY MP3
… s, A2 s ,V offline ANY MP3
…QN s, A2 s ,V offline ANY MP3
7. REFERENCES
[1] Y. Thurel, “LHC600A-10V Power Converter Presentation”, edms no. 888909.