
Sophisticated Technical Knowhow
from Accessories to Installation Engineering
XLPE cable is gaining popularity in high voltage application. Utilizing the broad base in technological and product
developing knowhow accumulated from the first pioneering steps in this field way back in the 1960's, we have to
date led the world in XLPE cable development. In 1995, we developed the world's first long distance 500kV extra
high voltage cable and since then actively participated in numerous projects for this voltage class of cable. JPS
provides full support towards its customers on "Full Turn Key" basis by providing high technology products, its
related accessories and facilities from design, development, manufacturing right through to installation planning
and its implementation. JPS has consistently provided prime quality and efficient engineering in diversified arenas
such as underground, submarine and bridge crossings.
VCV tower in Osaka Works.
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| 500kV XLPE cable installation work in Shinkeiyo Toyosu Line in 1996. |
35kV 3x250mm² XLPE submarine cable installed for offshore oil field in 1984. |
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| Optical fiber composite 33kV 3x95mm² XLPE submarine cable |
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500kV 1x1,400 mm² XLPE cable installed in Imaichi P/S in 1987. |
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77kV XLPE cable installed on the world's longest bridge in 1998. |
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Pre-Breakdown from Metal Contaminant

The most important point in designing a cable
is to determine the insulation thickness,
which is usually determined according to the
design stress and required expected life. To
improve the dielectric strength of XLPE
insulation, we detected the cause of the
breakdown point in insulation by prebreakdown
partial discharge detection
method, which shut down the applied voltage when detecting the partial discharge from the defect
point in insulation as shown in the above figure.