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Testing before operation shot.
Sheath Test.
Sheath Testing is an effective way to ensure that the cable is not damaged. If the cable is damaged in transport or after cable-laying it´s possible to detect errors in the outer sheath during testing. The fault can then be located and repaired.
Earth Connection Test.
To check the cable screen and longitudinal earthconductor implements a Earth Connection Test before the cable becomes operational.
After testing protocols are sent about the tests carried out. Therefore, we want to know a lot of data.
Please download the pdf-file "Faced Sheath Test & Earth Connection Test of cable located" and fill in for testing. There are also some tips on what to prepare for the test.
Test of older cables.
Water Tree.
Cables that have been in operation for many years and have been exposed to moisture can develop so-called water trees. This means small cavities in the conductor insulation that eventually leads to the cable breakdown. By making a Water Treeing Test you get to know about the development of water trees in the insulation.
Corrode screen.
Moisture in a cable may result in the cable screen corrodes. This leads to screen resistance increases and can become very sharp high. By measuring the resistance at different voltage levels may determine the screen's ability to meet the requirements for release at earth fault.
Locating Cable Fault
We can locate faults on cables that have foundered. We have a surge generator with associated listening device that in an efficient manner can help us to identify high recistant, internal faults in cables or joints. We also have a pulse reflection instrument at our disposal and our sheath testing equipment can sometimes be used to locate other types of cable faults.
Mounting.
We at Nexans are trained for installation of cable joints and terminations on PEX-insulated cables.
Special Drums.
Cable drums with mounted cable terminations to use as spare cables, etc. We also arrange so the cable is delivered on an adequate drum.
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