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Independent test laboratory, accredited by Deutsche Akkreditierungsstelle Technik (DATech) e.V. in the fields of h.v. apparatusand switchgear, power cables and power cable accessories, l.v. apparatus and switchgear, installation equipment andswitching and control equipment.
Institut „Prüffeld für elektrische Hochleistungstechnik“ GmbH (IPH Berlin) is a subsidiary of CESI S.p.A, Milan.
Independent, accredited testing station Member laboratory of STL and LOVAG
T E S T R E P O R T NO. 2977.2100555.0295
EM Electrical Materials Contracting Co. Tavukcuyolu, Türker Cad. No. 08 Y. Dudullu-Umraniye34776 Istanbul TURKEY
CLIENT
EM Electrical Materials Contracting Co. MANUFACTURER
Cross bonding link box TEST OBJECT
LB.U.CB.3SA.3.1 TYPE
Test sample SERIAL NO.
Rated DC withstand voltageRated lightning impulse withstand voltageRated short-time withstand current Rated duration of short-circuit Permissible values for internal arcing
Symmetrical short-circuit current Duration of short-circuit
IP code
2540 (60)
501
400.1
IPX8
kV kV kA s
kA s
RATEDCHARACTERISTICSGIVEN BY THECLIENT
Clients instructions NORMATIVEDOCUMENT
Dielectric tests Leakage current test IPX8 code test Short-time withstand current tests Test under conditions of arcing due to an internal fault Measurement of contact resistance Measurement of residual voltage
1. Present at the test................................. ................................................................... ......................................................... 4 2. Test performed................................................ ................................................................. ................................................... 4 3. Identity of the test object .................................................................... .............................................................. .......... 5 3.1 Technical data and characteristics.......................................................................................................................................................................................... 5 3.2 Identity documents .........................................................................................................................................................................................................................................5 4. Dielectric tests........................................ .............................................................. ................................................................ 6 4.1 Test laboratory ........................................................................................................................................................................................................................................................6 4.2 Normative document...................................................................................................................................................................................................................................6 4.3 Required test parameters......................................................................................................................................................................................................................6 4.4 Test arrangement...............................................................................................................................................................................................................................................6 4.5 Test and measuring circuits............................................................................................................................................................................................................... 7 4.6 Test results.....................................................................................................................................................................................................................................................................9 5. Leakage current test .......................................................... ............................................................... ........................... 12 5.1 Test laboratory ....................................................................................................................................................................................................................................................12 5.2 Normative document...............................................................................................................................................................................................................................12 5.3 Required test parameters..................................................................................................................................................................................................................12 5.4 Test arrangement...........................................................................................................................................................................................................................................12 5.5 Test and measuring circuits...........................................................................................................................................................................................................13 5.6 Test results.................................................................................................................................................................................................................................................................14 6. Proof of the degree of protection IPX8......................................................................................... ................. 15 6.1 Test laboratory ....................................................................................................................................................................................................................................................15 6.2 Normative document...............................................................................................................................................................................................................................15 6.3 Required test parameters..................................................................................................................................................................................................................15 6.4 Test arrangement...........................................................................................................................................................................................................................................15 6.5 Test and measuring circuits...........................................................................................................................................................................................................15 6.6 Test results.................................................................................................................................................................................................................................................................15 7. Short-time withstand current tests........................................................ ............................................................ 16 7.1 Test laboratory ....................................................................................................................................................................................................................................................16 7.2 Normative document...............................................................................................................................................................................................................................16 7.3 Required test parameters..................................................................................................................................................................................................................16 7.4 Test arrangement...........................................................................................................................................................................................................................................16 7.5 Test and measuring circuits...........................................................................................................................................................................................................17 7.6 Test results.................................................................................................................................................................................................................................................................18
8. Test under conditions of arcing due to an internal fault. ................................................................. 19 8.1 Test laboratory ....................................................................................................................................................................................................................................................19 8.2 Normative document...............................................................................................................................................................................................................................19 8.3 Required test parameters..................................................................................................................................................................................................................19 8.4 Test arrangement...........................................................................................................................................................................................................................................19 8.5 Test and measuring circuits...........................................................................................................................................................................................................20 8.6 Test results.................................................................................................................................................................................................................................................................21 9. Measurement of contact resistance........................................................................... ...................................... 22 9.1 Test laboratory ....................................................................................................................................................................................................................................................22 9.2 Normative document...............................................................................................................................................................................................................................22 9.3 Test and measuring circuits...........................................................................................................................................................................................................22 9.4 Test results.................................................................................................................................................................................................................................................................23 10. Measurement of residual voltage............................................................................. ......................................... 24 10.1 Test laboratory ....................................................................................................................................................................................................................................................24 10.2 Normative document...............................................................................................................................................................................................................................24 10.3 Test results.................................................................................................................................................................................................................................................................24 11. Summary of results .............................................................. .............................................................. ........................... 25 12. Photos.................................................. .................................................................... ............................................................. .. 26 13. Oscillograms................................................................ ................................................................. ..................................... 37 14. Drawing............................................................ ............................................................ ......................................................... 50
This test document comprises 50 sheets.
Distribution Copy No. 1
Copy No. 1 in English: EM Electrical Materials Contracting Co.
The test results relate only to the object tested. This document is confidential. Its transfer to third parties as well as its reproduction in extracts require the consent of the client.
Mr. Markhoff IPH test engineer (witnessing in Istanbul)
Mr. Erdeniz EM Electrical Materials Contracting Co.
Mr. Gürsoy EM Electrical Materials Contracting Co. (witnessing in Istanbul)
2. Test performed
Dielectric tests Leakage current test IPX8 code test Short-time withstand current tests Test under conditions of arcing due to an internal fault Measurement of contact resistance Measurement of residual voltage
The technical data and characteristics of the test object are defined by the following parametersand specified by the client.
Test object: Cross bonding link box Type: LB.U.CB.3SA.3.1Manufacturer: EM Electrical MaterialsSerial No.: Test sample
Year of manufacture:
2010
Data:
Rated voltage Not specifiedRated DC withstand voltage 25 kV Rated lightning impulse withstand voltage Up 40 (60) kV Rated short-time withstand current Ik 50 kA Rated duration of short-circuit t k 1 sPermissible values for internal arcing
Symmetrical short-circuit current 40 kA Duration of short-circuit 0.1 s
IP code IPX8
Characteristics: Thickness of housing 3 mm
3.2 Identity documents
The manufacturer confirms that the test object has been manufactured in compliance with thedrawings given in this document. IPH did not verify this compliance in detail. The identity of the test object is fixed by the following drawings and data submitted by the client:
Name of drawing Drawing No. Date of drawing Author Notes
CROSS BONDING LINK BOX FOR UNDERGROUND USE TYPE: LB.U.CB.3SA.3.1
10.04.03Rev. 0
28.04.2010 EMELEC Sheet 50
10.04.03-LB.U.CB.3SA.3/1 -Page 3/4
13.05.2010 EMELEC 1)
10.04.03-LB.U.CB.3SA.3/1 -Page 4/5
13.05.2010 EMELEC 1)
1) These drawings are not part of this test document. They are retained in the IPH archives.
Entry of test object at IPH: 31 May and 21 June 2010
Impulse circuit: Number of stages n = 2Impulse capacitance CS = 70 nFLoading capacitance CB = 1.5 nFDamping resistance R D = 122 Discharge resistance R E = 1200
1C R
R
SCBE
D
PO
+/-
ZFSGl
~
Gl Rectifier R D Damping resistanceCS Impulse capacitance CB Loading capacitanceZFS Spark gap PO Test object R E Discharge resistance 1 Voltage measurement
Figure 2: Test and measuring circuit for the lightning impulse voltage test
1 Test voltage R divider of SMR 10/770 type(made by TuRD) with digitalmeasuring instrument of DMI 551 type (made by Haefely) and TDS 220 digital oscilloscope(made by Tektronix)
Date of test: 09 June 2010Front time of lightning impulse wave: 1.04 μs
Tail time of lightning impulse wave: 53.2 μs Air temperature: 21.4 C Air pressure: 100.21 kPa Air humidity (relative): 58 % Atmospheric correction of test voltage: Without atmospheric correction
Every voltage is related to an air pressure of 101.3 kPa, an air temperature of 20 C and an air humidity of 11 g/m3.
Test set-upMP
A
B
C
L1
L2
Frame
L3
S
S1
S2
S3
Impulsewithstand voltage
Test voltage 1) Number of impulses/disruptivedischarges
Date of test: 09 June 2010Front time of lightning impulse wave: 1.11 μs
Tail time of lightning impulse wave: 53.2 μs Air temperature: 21.4 C Air pressure: 100.21 kPa Air humidity (relative): 58 % Atmospheric correction of test voltage: Without atmospheric correction
Every voltage is related to an air pressure of 101.3 kPa, an air temperature of 20 C and an air humidity of 11 g/m3.
Test set-upMP
A
B
C
L1
L2
Frame
L3
S
S1
S2
S3
Impulsewithstand voltage
Test voltage 1) Number of impulses/disruptivedischarges
Date of test: 09 June 2010 Testing time after having reached full amplitude: 1 min Air temperature: 21.4 C Air pressure: 100.21 kPa Air humidity (relative): 58 % Atmospheric correction of test voltage: Without atmospheric correction
Every voltage is related to an air pressure of 101.3 kPa, an air temperature of 20 C and an air humidity of 11 g/m3.
Test set-up 2)
MP
L1
L2
Frame
L3
S
S1
S2
S3
DCwithstand voltage
Test voltage 1) Leakagecurrent
Configuration Voltageapplied to
Earthed kV kV μ A
- L1 MP, F 5 5 <1
- L2 MP, F 5 5 <1
- L3 MP, F 5 5 <1
Notes:
1) Related to normal atmospheric conditions2) Serial No. of surge arrestors: L1: 597 L2: 598 L3: 599
EM Elektrik Test Facilities Tavukcuyolu, Türker Cad. No. 08 Y. Dudullu-Umraniye34776 Istanbul TURKEY
6.2 Normative document
Client’s instructions
6.3 Required test parameters
IPX8
Water immersion test
Test means Pressure tank Water pressure of test 1 bar Test duration 24 hours
6.4 Test arrangement
The test object was put into a pressure tank in horizontal position with the cables entries at the front (see Photo 7). The rubber gasket of the link box was fixed by glue, mutters tightened with 15 Nm. The pressure tank was filled with 1 bar water pressure. The feedback control is applied to sustain 1 bar water pressure for 24 hours.
6.5 Test and measuring circuits
None
6.6 Test results
Date of test: 01 and 02 June 2010
The test of the protection IPX8 is considered as passed, if after the test no water penetrated or only in such an amount that the correct operation of the device as well as the safety are not affected.
Result: No damage on gaskets and no water penetrated into the enclosure during the test.
The protection degree IPX8 is ensured for the tested link box.
Short-time withstand current tests Test No. 110 4305 to 110 4308
Number of phases (Test circuit) 3/2
Number of poles/phases (Test object) 3
Power frequency Hz 50
Power factor cos < 0.15
Grid Not earthed
Earthing conditions Short-circuit transformer Not earthed
Short-circuit point One side earthed
E
MB MS L Tr I TO
1
U
2
R
Y
B
Earth bar
B
R
Y
E Supply I Current measurement MB Master breaker U Voltage measurement MS Making switch 1 – 2 Measuring pointsL Current-limiting reactor TO Test object Tr Short-circuit transformer
Figure 4: Test circuit (diagram of the test of the R-R'-connection)
Measuring point Symbol in theoscillograms
Measured quantity Measuring sensor/device
1 i Short-circuit current Rogowski measuring device
2 u Voltage RC divider
Recording instrument: BE 256 transient recorder system
Tests under conditions of arcing due toan internal fault
Test No. 110 4725 and 110 4726
Number of phases (Test circuit) 3/2
Number of poles/phases (Test object) 3
Power frequency Hz 50
Power factor cos < 0.15
Grid Not earthed
Earthing conditions Short-circuit transformer Not earthed
Short-circuit point Earthed
E
MB MS L Tr I TO
1
U
2
R
Y
B
Earth bar
B
R
Y
E Supply I Current measurement MB Master breaker U Voltage measurement MS Making switch 1 – 2 Measuring pointsL Current-limiting reactor TO Test object Tr Short-circuit transformer
Figure 5: Test circuit
Measuring point Symbol in theoscillograms
Measured quantity Measuring sensor/device
1 i Short-circuit current Rogowski measuring device
2 u Voltage RC divider
- P_ges Arc power Calculated value
- W Arc energy Calculated value
Recording instrument: BE 256 transient recorder system
As agreed with the client, the test object was subjected to a
DC voltage withstand voltage of 25 kV Phase-to-earth insulation andPhase-to-phase insulation
Lightning impulse withstand voltage of 40 kV Phase-to-earth insulation and60 (50) kV Phase-to-phase insulation
In the DC voltage tests no disruptive discharge occurred.
In the lightning impulse voltage test the number of disruptive discharges was 0 for every 10 impulses.
The requirements for the dielectric tests as specified by the client have been fulfilled.
Leakage current test
As agreed with the client, the test object was subjected to a
DC voltage withstand voltage of 5 kV Phase-to-earth insulation
The requirements for the leakage current test as specified by the client have been fulfilled.
IPX8 code test
The protection degree IPX8 is ensured for the tested link box.
Short-time withstand current tests
The test object was capable of carrying the rated symmetrical short-circuit current of 50 kA for aduration of short-circuit of 1 s properly. Conductors did not show any undue deformation. The
supporting insulating parts did not show any significant signs of deterioration.
Test under conditions of arcing due to an internal fault
The test object was subjected to a test under conditions of arcing due to an internal fault for aprospective value of the short-circuit current of 40 kA for a duration of short-circuit of 0.1 s. The housing did not burst, no debris were ejected. There are no parts away-flown which couldcause a hazard.
Measurement of residual voltage
The maximum residual voltage measured during the tests was 23.8 kV.