OBJECT Prefabricated substation TYPE Clipper C27 SERIAL No. 37062003

REPORT OF PERFORMANCE 08-1284

1000 kVA, 20 kV / 410 V, 50 Hz

This Report of Performance applies only to the object tested. The responsibility for conformity of any object having the same designations with that tested rests with the Manufacturer. This report consists of 24 pages in total. © Copyright: Only integral reproduction of this report is permitted without written

permission from KEMA. Electronic copies in e.g. PDF-format or scanned version of this report may be available and have the status “for information only”. The sealed and bound version of the report is the only valid version.

KEMA Nederland B.V.

P.G.A. Bus KEMA T&D Testing Services Managing Director Arnhem, 22 May 2008

MANUFACTURER Areva T&D Saint Jean de Védas, France

CLIENT Areva T&D Saint Jean de Védas, France

TESTED BY KEMA HIGH-VOLTAGE LABORATORY Arnhem, the Netherlands

DATES OF TESTS 11 till 19 December 2007

TEST PROGRAMME Temperature-rise test, in accordance with IEC 62271-202 (2006-06).

SUMMARY AND CONCLUSION

The test is passed with satisfactory results in case the enclosure class is designated as mentioned below: 1 With IP43 configuration for all compartments.

The minimum possible enclosure class is 10 K. 2 With IP43 configuration for the LV and HV switchgear compartments and

with IP23 configuration for the transformer compartment. The minimum possible enclosure class is 5 K.

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TABLE OF CONTENTS

TABLE OF CONTENTS .......................................................................................................................... 2

1 Identification of the test object......................................................................................................3 1.1 Ratings assigned by the manufacturer ........................................................................................3 1.2 Description of the test object........................................................................................................3 1.3 List of drawings ............................................................................................................................5

2 General information......................................................................................................................6 2.1 The tests were witnessed by........................................................................................................6 2.2 The tests were carried out by.......................................................................................................6 2.3 Reference to other reports ...........................................................................................................6 2.4 Purpose of the test .......................................................................................................................6 2.5 Measurement uncertainty.............................................................................................................6 2.6 Applicable standards....................................................................................................................6

3 Temperature-rise test ...................................................................................................................7 3.1 Temperature-rise test on the power transformer outside the enclosure ......................................7 3.1.1 Determination of the total losses in accordance with IEC 60076-1 .............................................7 3.1.2 Determination of the top oil temperature-rise of the power transformer (total losses).................7 3.2 Temperature-rise test on the complete assembly........................................................................8 3.2.1 Location of thermocouples ...........................................................................................................8 3.2.2 List of thermoucouples ...............................................................................................................10 3.2.3 Supplied power and supplied currents to the substation ...........................................................11 3.2.4 Temperature-rise test data.........................................................................................................12

APPENDIX A MEASUREMENT UNCERTAINTIES......................................................................... 15

APPENDIX B MANUFACTURER’S DRAWINGS ............................................................................ 16

APPENDIX C PHOTOGRAPH OF THE TEST SET-UP .................................................................. 24

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1 IDENTIFICATION OF THE TEST OBJECT 1.1 Ratings assigned by the manufacturer Rated primary voltage (Umax) 24 kV Rated secondary voltage 410 V Rated frequency 50 Hz Number of phases 3 Rated primary current 28,9 A Rated secondary current 1406 A Rated maximum power of the substation 1000 kVA Rated power of transformer 1000 kVA Total losses of transformer 12257 W determined during tests Rated temperature-rise class of enclosure determined during tests Rated IP class of enclosure determined during tests 1.2 Description of the test object Prefabricated substation Manufacturer Areva T&D, Saint Jean de Védas, France Type Clipper C27 Serial no. 37062003 Drawings see appendix B Year of manufacture 2007 Transformer Manufacturer GEC Alsthom, Le Petit Quevilly, France Type UTHA Serial no. 114130 Power 1000 kVA Type of cooling ONAN Vector symbol Dyn11 Rated primary voltage 20 kV Rated primary current 28,9 A No. of primary tappings 3 (20,5 kV – 20,0 kV – 19,5 kV) Rated secondary voltage 410 V Rated secondary current 1406 A Short-circuit impedance 5% Winding material Al Standard NF C 52 113

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HV Switchgear Manufacturer Areva T&D, Mâcon, France Type FBX-C/24-16/C-C-T1 Serial no. FBX - 0743069/AMT Rated voltage 24 kV Rated current 630 A Rated frequency 50 Hz Standard IEC 62271-200 HV fuses Manufacturer Areva T&D, Montpellier, France Type FDW7.2-50-4-6 (with medium type striker pin) No. of fuses installed 3 Rated voltage 7,2 kV Rated current 50 A Year of manufacture 2007 Standard IEC 60282 / DIN 43625 LV switch-disconnector Manufacturer Socomec Guerin, France Type SIRCO 1800A / HN 63-S-61 Serial no. 10107-160 No. of switch disconnectors installed 1 No. of phases 3 Rated voltage 400 V Rated current 1800 A Rated frequency 50/60 Hz Standard IEC 60947-3 LV fuse switch-disconnector Manufacturer Pronutec, Lemoa, Spain Type BTVC 400A DU No. of fuse switch disconnectors installed 8 No. of phases per fuse switch disconnector 3 Rated voltage 690 V / 500 V Rated current 315 A / 400 A Rated frequency 50 Hz Standard IEC 60947-3 / VDE 0660-107

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LV fuse Manufacturer Siemens Type 3NA3 254 (NH2-gG) Rated voltage 500 V Rated current 355 A No. of of fuses installed 12 1.3 List of drawings The manufacturer has guaranteed that the object submitted for tests has been manufactured in accordance with the following drawing. KEMA has verified that this drawing adequately represents the object tested. The following drawing is included in appendix B of this report: - 104093 D (7 sheets) 1000 kVA package substations Clipper C27 (modifications)

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2 GENERAL INFORMATION 2.1 The tests were witnessed by Name Company

Mr T. Cormenier Areva T&D Saint Jean de Védas, France

2.2 The tests were carried out by Name Company

Mr W.J.W.M. Sloot KEMA Nederland B.V., Mr A.H. Minkhorst Arnhem, the Netherlands Mr R.J. Kloppenburg Mr G.J. Jansen 2.3 Reference to other reports Report no. Tests described

08-1285 Temperature-rise test with additional IR radiation 2112200.01-QUA/INC Verification of the degree of protection 2.4 Purpose of the test Purpose of the test was to verify whether the material complies with the specified requirements. 2.5 Measurement uncertainty A table with measurement uncertainties is enclosed in appendix A. Unless otherwise indicated in the report, the measurement uncertainties of the results presented are as indicated in this table. 2.6 Applicable standards When reference is made to a standard and the date of issue is not stated, this applies to the latest issue, including amendments, which have been officially published prior to the date of the tests.

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3 TEMPERATURE-RISE TEST Standard and date Standard IEC 62271-202, clause 6.3 Test dates 11 – 19 December 2007 In particular, the test shall demonstrate that the temperature-rise of the transformer inside the enclosure, does not exceed that measured on the same transformer outside the enclosure, by more than the value which defines the class of enclosure. 3.1 Temperature-rise test on the power transformer outside the enclosure 3.1.1 Determination of the total losses in accordance with IEC 60076-1

item tap position HV winding LV winding losses dc-resistance at θamb of 18 °C 2 3,6889 Ω 1,0817 mΩ load losses at θref of 75 °C 2 10266 W no-load losses 1991 W total losses 12257 W

3.1.2 Determination of the top oil temperature-rise of the power transformer (total losses)

item top oil temperature 79,2 °C average ambient temperature 21,3 °C top oil temperature-rise of the transformer outside the enclosure θtop-oil

a) 57,9 K

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stability reached12-12-2007 at 09h25top oil: 79,2 °Caverage ambient: 21,3 °C

Figure 1 Heat-run on transformer with total losses of 12,26 kW.

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3.2 Temperature-rise test on the complete assembly 3.2.1 Location of thermocouples Figures 2 and 3 show the location of the thermocouples that were installed. Figure 4 is a photograph of the total assembly without the roof of the substation.

Figure 2 Location of thermocouples.

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Figure 3 Location of thermocouples.

Figure 4 Photograph of assembled substation without roof.

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3.2.2 List of thermoucouples The numbers indicated in figures 2 and 3 correspond with the numbers listed in the table. TC no. description

1 upper terminal main switch L1 2 upper terminal main switch L2 3 upper terminal main switch L3 4 lower terminal main switch L1 5 lower terminal main switch L2 6 lower terminal main switch L3 7 connection vertical to horizontal busbar L3 8 connection vertical to horizontal busbar L2 9 connection vertical to horizontal busbar L1 10 busbar connection fuse-switch disconnector L3 11 busbar connection fuse-switch disconnector L2 12 busbar connection fuse-switch disconnector L1 13 busbar connection strip of fuse-switch disconnector L3 14 busbar connection strip of fuse-switch disconnector L2 15 busbar connection strip of fuse-switch disconnector L1 16 top of fuse cover of fuse-switch disconnector L3 17 top of fuse cover of fuse-switch disconnector L2 18 top of fuse cover of fuse-switch disconnector L1 19 operating handle of fuse-switch disconnector L3 20 operating handle of fuse-switch disconnector L2 21 operating handle of fuse-switch disconnector L1 22 top-oil of power transformer 23 top of high-voltage switchgear 24 handle of low-voltage main switch 25 door low-voltage compartment (20 cm from top) 26 door high-voltage switchgear compartment (20 cm from top) 27 door transformer compartment (20 cm from top) 28 top louver ventilation grid transformer compartment 29 top louver ventilation grid transformer compartment 30 top louver ventilation grid transformer compartment 31 ambient 32 ambient 33 ambient 34 ambient

35 1) cable terminal of fuse-switch disconnector L1 36 1) cable terminal of fuse-switch disconnector L1 37 1) cable terminal of fuse-switch disconnector L1

1) Temperatures measured with hand held equipment.

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At four locations around the substation, at a distance of approximately 1m and at approximately the average height of the current carrying parts in the substation, thermocouples were installed to measure the ambient temperature during the test. 3.2.3 Supplied power and supplied currents to the substation Transformer, HV and LV interconnections, and low-voltage equipment temperature-rise tests, have been performed simultaneously. As outlined in clause 6.3.1 of IEC 62271-202, a temperature-rise test of the HV switchgear is not required. In order to be able to carry out the test on the transformer, the LV terminals of the transformer were interconnected. The LV assembly has been tested with a short-circuit connection on the feeding terminals of the LV switch-disconnector. A diagram of the circuits is given in figure 5.

In order to obtain the most severe conditions in respect to heat generation, the supply current of the LV switchboard has been distributed over a minimum number of adjacent LV outgoing feeders. These feeders were loaded with the maximum possible current and smallest possible size of the fuse rating.

Figure 5 Diagram of the temperature-rise test.

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The following loading conditions were applicable during the temperature-rise test: side total-loss

injection in the transformer

rated LV current of the transformer

maximum allowable current per LV-feeder 1), 2)

no. of adjacent feeders connected in the circuit

installed fuse size

HV 12,26 kW LV 1408 A 352 A 4 350 A 1) The manufacturer has declared the maximum allowable current for the LV switch-fuse disconnectors for this application. 2) The cables for the connection to the feeders of the fuse-switch disconnectors were selected In accordance with clause 8.2.1.3.1 and table 8 of IEC 60439-1. The size of the cables was 240 mm2. Adjustable impedances, installed in every LV cable, were used to equalize the currents.

3.2.4 Temperature-rise test data In total two tests have been carried out: 1 Test in a proved IP43 configuration for all compartments. 2 Test in a proved IP43 configuration for the LV and HV switchgear compartments and with a

proved IP23 configuration for the transformer compartment. The absolute temperature data of both tests is shown in the graph, presented in figure 6.

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TC 1 TC 2 TC 3 TC 4 TC 5 TC 6 TC 7 TC 8 TC 9 TC 10 TC 11 TC 12TC 13 TC 14 TC 15 TC 16 TC 17 TC 18 TC 19 TC 20 TC 21 top oil TC 23 TC 24TC 25 TC 26 TC 27 TC 28 TC 29 TC 30 TC 31 TC 32 TC 33 TC 34

IP43 configuration, stability reached 18-12-2007 at 10h55, top-oil: 82,9 °C, average ambient: 18,0 °C, top-oil temp.-rise: 64,9 K

Transformer compartment IP23HV-switchgear compartment IP43LV-switchgear compartment IP43stability reached18-12-2007 at 18h15top-oil: 78,7 °Caverage ambient: 18,8 °Ctop-oil temp.-rise: 59,9 K

Transformer outside substation, top-oil temp.-rise: 57,9 K

Figure 6 Data of temperature-rise tests.

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The results and requirements are also listed in the following table.

recorded absolute temperature determined temperature-rise maximum allowable temperature-rise

TC no.

test 1 (°C)

test 2 (°C)

test 1 (K)

test 2 (K)

(K)

1 79,3 71,2 61,3 52,4 65 2 81,5 72,6 63,5 53,8 65 3 81,6 73,3 63,6 54,6 65 4 61,6 58,1 43,6 39,4 65 5 65,6 62,3 47,6 43,5 65 6 67,0 63,8 49,0 45,0 65 7 51,6 49,6 33,7 30,8 - 8 58,6 56,6 40,7 37,8 - 9 62,6 60,1 44,7 41,4 - 10 57,5 55,6 39,8 36,8 65 11 62,4 60,0 44,4 41,2 65 12 62,5 60,4 44,6 41,7 65 13 72,0 64,8 54,1 46,0 65 14 72,5 66,6 54,5 47,9 65 15 75,0 68,5 57,0 49,8 65 16 42,4 43,1 24,4 24,3 40 17 51,2 50,7 33,2 31,9 40 18 48,3 47,1 30,3 28,3 40 19 22,3 22,5 4,3 3,8 25 20 25,2 25,2 7,2 6,4 25 21 29,5 28,6 11,6 9,9 25 22 82,9 78,7 64,9 59,9 57,9 + class 1) 23 33,3 31,4 15,3 12,7 30 24 35,1 32,8 17,1 14,1 25 25 42,1 38,9 24,1 20,2 30 26 24,7 24,2 6,7 5,5 30 27 46,8 44,0 28,8 25,3 30 28 47,2 44,8 29,2 26,1 40 29 46,2 44,1 28,2 25,3 40 30 47,0 44,1 29,0 25,4 40 31 17,9 18,7 - - - 32 18,0 18,9 - - - 33 18,0 18,7 - - - 34 18,0 18,7 - - -

351) - 35,0 - 17,0 65 361) - 33,0 - 15,0 65 371) - 35,0 - 17,0 65

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1) Top oil temperature-rise determined outside enclosure (see 3.1.2) + class of enclosure

Result All individually determined temperature-rise values are in compliance with the requirements. The following conclusions can be drawn from the determined top-oil temperature-rises in the two tests: - With IP43 configuration for all compartments, the minimum possible enclosure class is 10 K. - With IP43 configuration for the LV and HV switchgear compartments and with IP23 configuration

for the transformer compartment, the minimum possible enclosure class is 5 K. Both tests are passed with satisfactory results when the enclosure class is designated as mentioned above.

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APPENDIX A MEASUREMENT UNCERTAINTIES The measurement uncertainties in the results presented are as specified below unless otherwise indicated.

measurement measurement uncertainty dielectric tests and impulse current tests

peak value: ≤ 3% time parameters: ≤ 10%

capacitance measurement tan δ measurement

0,3% ± 0,5% ± 5x10-5

partial discharge measurement < 10 pC : 2 pC 10 - 100 pC : 5 pC > 100 pC : 20 %

measurement of impedance ac-resistance measurement

≤ 1%

measurement of losses ≤ 1% measurement of insulation resistance ≤ 10% measurement of dc resistance 1 µΩ - 5 µΩ : 1%

5 µΩ - 10 µΩ : 0,5% 10 µΩ - 200 µΩ : 0,2%

radio interference test 2 dB calibration of current transformers 2,2 x 10-4 Ii/Iu and 290 µrad calibration of voltage transformers 1,6 x 10-4 Ui/Uu en 510 µrad measurement of conductivity 5% measurement of temperature -50 °C – -40 °C : 3 K

-40 °C – 125 °C : 2 K 125 °C – 150 °C : 3 K

tensile test 1% sound level measurement type 1 meter as per IEC 651 and

ANSI S1.4.1971 measurement of voltage ratio 0,1%

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APPENDIX B MANUFACTURER’S DRAWINGS 7 pages drawing no. description/title date rev. 104093 D 1/7 1000 kVA package substations clipper C27 (modifications) 12-11-07 D 104093 D 2/7 Front face 104093 D 3/7 Rear face 104093 D 4/7 Right side and left side 104093 D 5/7 Top view 104093 D 6/7 Cross section A-A 104093 D 7/7 Cross section B-B

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APPENDIX C PHOTOGRAPH OF THE TEST SET-UP

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