[PDF] New qualification tests for high loaded joints





Previous PDF Next PDF



• Jicable15 21 - 25 June 2015 - Versailles - France

25-Jun-2015 Jicable'15 21 - 25 June 2015 - Versailles - France. Exemple: inox tubes in HV cable 220 kV 2500 mm² Al. Temperature monitoring on HV cables ...



Laboratory and field partial discharge measurement in HVDC power

The longer data acquisition time under DC requires better interference and filtering measures. Page 7. •. Jicable'15 21 - 25 June 2015 - Versailles - France.



ASSESSING SMOKE AND HEAT RELEASE DURING

25-Jun-2015 Jicable'15 21 - 25 June 2015 - Versailles - France. ASSESSING SMOKE AND HEAT. RELEASE DURING COMBUSTION OF. ELECTRIC CABLES USING CONE.



Improved Method of Determining Bending Stiffness of Underground

Jicable'15 21 - 25 June 2015 - Versailles - France. Improved Method of Determining Bending. Stiffness of Underground Cables. Janislaw TARNOWSKI.



Versailles Wine List Curves 2015.cdr

Sauvignon Blanc can be made in a variety of different styles depending on the area. The styles vary from tropical fruit through.



Remnant Static Mechanical Stresses and Water Tree Ageing of

Result 1: No significant different water treeing during ageing at static and dynamic mechanical strain. Page 8. •. Jicable'15 21 - 25 June 2015 - Versailles - 



New qualification tests for high loaded joints

Jicable'15 21 - 25 June 2015 - Versailles - France. Thermo-mechanical forces are never applied during the qualification of the joints and connectors 



PQ TEST AND FIRST 230 KV CABLE SYSTEM IN MEXICO

25-Jun-2015 Jicable'15 21 - 25 June 2015 - Versailles - France. TAT & PQT – 230 kV EHV Cable System: Standards. Testing Requirements for HV & EHV Power.



Copper or Aluminium cable conductors broadly compared in a life

Jicable'15 21 - 25 June 2015 - Versailles - France. Copper or Aluminium cable conductors



Development and high temperature qualification of innovative 320

25-Jun-2015 Jicable'15 21 - 25 June 2015 - Versailles - France. PERFORMANCES AND POTENTIAL LIMITS OF EXISTING. CROSSLINKED INSULATIONS FOR HVDC CABLES.

•Jicable'15, 21 -25 June2015 -Versailles -France •Jicable'15, 21 -25 June2015 -Versailles -France

New qualification tests for high

loaded joints •Jicable'15, 21 -25 June2015 -Versailles -France •Jicable'15, 21 -25 June2015 -Versailles -France

Blandine HENNUY, Laborelec, Belgium, blandine.hennuy@laborelec.comFred STEENNIS, Bernd VAN MAANEN, DNV GL, the Netherlands, Fred.Steennis@dnvgl.com

, Bernd.vanMaanen@dnvgl.com Eddy DE RIDDER, Simon STUL, Nexans Network Solutions,

Belgium,

Eddy.De_Ridder@nexans.com

, simon.stul@nexans.com

Ben AERNS, Alliander, the Netherlands,

ben.aerns@alliander.com

LeonBOKMA, Westland Infra, the Netherlands, Leon.Bokma@westlandinfra.nlPieter BUYS, Stedin, the Netherlands,

peter.buys@stedin.net

PhilippeCOLIN, ORES, Belgium,

philippe.colin@ores.net

Ralf MEIER, 3M, Germany,

rmeier@mmm.com

PietOOSTERLEE, DELTA Netwerkbedrijf, the Netherlands, poosterlee@dnwb.nlKenny SEURINCK, Eandis, Belgium,

kenny.seurinck@eandis.be

Piet SOEPBOER, Enexis, the Netherlands,

Piet.Soepboer@enexis.nlHoussam TANZEGHTI,EDF, France, houssam.tanzeghti@edf.fr Marcel VAN DEN BERG, Sibelga, Belgium, marcel.vandenberg@sibelga.be •Jicable'15, 21 -25 June2015 -Versailles -France •Jicable'15, 21 -25 June2015 -Versailles -France

Starting point: high failure rate of

high (cyclic) loaded MV joints due to thermal mechanical forces •Jicable'15, 21 -25 June2015 -Versailles -France •Jicable'15, 21 -25 June2015 -Versailles -France

Thermo-mechanical forces are

never applied during the qualification of the joints and connectors •Jicable'15, 21 -25 June2015 -Versailles -France •Jicable'15, 21 -25 June2015 -Versailles -France

Theoretical forces

•Jicable'15, 21 -25 June2015 -Versailles -France •Jicable'15, 21 -25 June2015 -Versailles -France

Measured forces

Actualforces are significant

• maximum approximately 6 kN for 240 mm², 16.5 kN for 630 mm² • No significant difference between strandedand solid conductor •Jicable'15, 21 -25 June2015 -Versailles -France •Jicable'15, 21 -25 June2015 -Versailles -France

Two options

All in one set up

Three tests to reproduce the

main causes of failure •Jicable'15, 21 -25 June2015 -Versailles -France •Jicable'15, 21 -25 June2015 -Versailles -France - water ingress in joints due to degradation of the interface between cable and joint water penetration test on joints - thermo-mechanical impact on behavior of the connector resistance mechanical (cyclic) test on connectors - thermal behavior thermal stability test •Jicable'15, 21 -25 June2015 -Versailles -France •Jicable'15, 21 -25 June2015 -Versailles -France

MECHANICAL TESTS

In the tests made in the past, different forces/stresses have been used and up to 200 push/pull cycles have been performed The test specimen consists of 2 identical connectors installed in the same way on the conductor with a small distance between the edges of the connectors •Jicable'15, 21 -25 June2015 -Versailles -France •Jicable'15, 21 -25 June2015 -Versailles -France

MECHANICAL TESTS

Several connector types - including hexagonal and deep indent crimped contacts and screw type connectors - installed on solid and stranded Alu conductors of 240mm² and 630mm² were tested. They were subjected to alternating push-pull force applications . The magnitude of the applied forces was gradually increased in steps from about 25 to 40 N/mm². •Jicable'15, 21 -25 June2015 -Versailles -France •Jicable'15, 21 -25 June2015 -Versailles -France

MECHANICAL TESTS

On some tested objects, the resistance between the connectors was measured while cycled at about 20 N/mm². A substantial resistance increase was observed at the relaxation phase during force reversal. This suggests that even momentary mechanical overloading - e.g. by conductor displacements in non-elastic cable arrangements - affects the contact resistance, the effect of which remains after the stress has been removed. The temperature increase could not be studied in this test set-up. •Jicable'15, 21 -25 June2015 -Versailles -France •Jicable'15, 21 -25 June2015 -Versailles -France

WATER PENETRATION TEST

Cable cleats are installed every 30 cm for a length of 4 meters on both sides of the joint. On each side of the joint, 1 meter cable section is not blocked such that lateral movement is possible in order to get a maximum stress on the water seals. •Jicable'15, 21 -25 June2015 -Versailles -France •Jicable'15, 21 -25 June2015 -Versailles -France

WATER PENETRATION TEST

testing procedure:

1. after the cable has been installed , the PVC pipe will be filled with

water at the required pressure. As soon as the pipe is filled a first sheath test is performed

2. the assembly is left to soak for 24 hours

3. a second sheath test is performed at 10 kV DC, for 5 minutes

4. the cable is subjected to 10 heating cycles as prescribed by

IEC61442. No test voltage shall be applied. The water temperature will not be controlled or measured

5. a third sheath test is performed at 10 kV DC, for 5 minutes.

•Jicable'15, 21 -25 June2015 -Versailles -France •Jicable'15, 21 -25 June2015 -Versailles -France

WATER PENETRATION TEST

A total of 14 medium voltage joints were tested. 4 out of the 14 joints were equipped with deliberate defects in order to investigate whether the test could discriminate between healthy and defective joints. In total

4 joints failed the test (in relation to the expectations):

1 unexpected failure

1 unexpected survivor (a joint with insufficient sanding of cable outer

sheath survived 20 heating cycles)

3 failed as would be expected (insufficient sanding and degreasing +

sand/dust + pollution + rope defect). •Jicable'15, 21 -25 June2015 -Versailles -France •Jicable'15, 21 -25 June2015 -Versailles -France

WATER PENETRATION TEST

However, all joints that did fail, failed within 1 hour after water was added. Thus, all failures occurred before any heating cycles were applied. Based on these results it seems that, if a defect is present threatening the water tightness, this will probably also show up in a sheath test without the application of heat cycles. One of the joints with deliberate defect did not show up in the sheath test, even after enduring 20 heating cycles.Thus, it seems that the application of the number of heating cycles as proposed in this test does not seem sufficiently discriminative or particularly useful. •Jicable'15, 21 -25 June2015 -Versailles -France •Jicable'15, 21 -25 June2015 -Versailles -France

EVALUATION OF THERMAL BEHAVIOR

The goal of the test is to evaluate the thermal behavior of the entire cable system (combination cable, joint and connector) in real conditions. The temperatures of the cable conductor, connector and joint are measured for several conductor temperatures (80C, 95C,

110C and 125C).

•Jicable'15, 21 -25 June2015 -Versailles -France •Jicable'15, 21 -25 June2015 -Versailles -France

EVALUATION OF THERMAL BEHAVIOR

Requirements:

(TC5)

3. Registration TC4 + thermal image (determination of 'hot spot")

* increased with the sum of measurement faults The goal of the test is to evaluate the thermal behavior of the entire cable system (combination cable, joint and connector) in real conditions. The temperatures of the cable conductor, connector and joint are measured for several conductor temperatures (80C, 95C, 110C and

125C).

•Jicable'15, 21 -25 June2015 -Versailles -Francequotesdbs_dbs4.pdfusesText_8
[PDF] 2015 versailles holiday tournament

[PDF] 2015 versailles pumpkin show queen

[PDF] 2015 video xxxix

[PDF] 2015 vs 2016 yoyo stroller

[PDF] 2015 washington achievement award image

[PDF] 2015 washington state energy code forms

[PDF] 2015 washington wild things schedule

[PDF] 2015-14

[PDF] 2015-17 movies

[PDF] 2015-54

[PDF] 2016 10k across the bay

[PDF] 2016 2nd avenue north birmingham alabama

[PDF] 2016 2nd presidential debate

[PDF] 2016 2nd round draft order

[PDF] 2016 3.5 ecoboost problems