EoW September 2008

english technology news

Quality control in high voltage cable production

With its X-RAY 8000 NXT measuring system Sikora provides a tool for quality control, production optimisation and reduced material consumption in power cable production. X-RAY 8000 NXT is the evolutionary successor of the X-RAY 8000 for measurement at CV-lines. is suitable for permanent quality control at the production of MV-, HV- and EHV-cables in CCV-, VCV- and MDCV-lines. Sikora is well known in the field of EHV-cable production. Specifically developed for this application area Sikora X-RAY 8000 NXT

X-RAY 8000 NXT Scanner Box ▲ ▲

offers the X-RAY 8000 NXT for the largest cable diameters from 180mm for CCV-lines and 220mm for VCV-lines. The X-RAY 8000 NXT measures the wall thickness, eccentricity, diameter and ovality with high measuring accuracy and repeatability.

Multi-sensor semiconductor detectors are incorporated into the high-end variant of the X-RAY 8000 NXT. This multi-sensor technology provides reliable readings, even where the cable may vibrate, and provides four measuring values at each scanning process for precise measurement. Ceramic windows (patent pending) separate the scanners from the pressure of the CV-line. The surface of the ceramic windows does not react with any by-products resulting from the cross linking process and always remain clean. measuring systems, the cleanliness of the insulating material is an important requirement for compliance with quality criteria in the production of high voltage cables. Sikora offers an intelligent solution to recognise contamination in the PE-insulation before the cable is produced. Using the CSS 2 camera system from Sikora the total XLPE-material is examined for purity in the flow channel directly before the crosshead. The CSS 2 indicates when production can start; it reports contamination and detects combustion particles, including amber and scorches in the material, using a quantitative and graphical display. Together with reliable

CSS 2 detects contamination in the PE-insulation ▲ ▲

Only one scan is necessary to calculate all measuring values. X-RAY 8000 NXT allows the operator a fast centring of the extrusion tools, as well as optimum control of the production line in automatic mode.

Sikora AG – Germany Fax : +49 421 48900 90 Email : sales@sikora.net Website : www.sikora.net

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EuroWire – September 2008