Electrical stress control

Details Electrical stress control Electrical stress control

H - Electricity

02

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337/45

H02G 15/064 (2006.01) H02G 15/068 (2006.01) H02G 15/184 (2006.01) H02G 15/30 (2006.01)

Patent

CA 1215442

ABSTRACT ELECTRICAL STRESS CONTROL An arrangement for and method of limiting the electrical stress in a region of high electric field strength associated with high voltage equipment, especially power cables, employs two overlapping layers of semiconductive material that have different a.c. electrical impedance characteristicsto surround the region. The inner layer may be a heat-shrinkable tube having a linear characteristic, and the outer layer may have a non-linear characteristic and be provided as an internal coating on a further heat-shrinkable tube of insulating material. Such an arrangement provides good electrical protection in terms of both a.c. and impulse performance.

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