| 摘要 |
An arrangement for and method of limiting the electrical stress in a region of high electric field strength associated with high voltage equipment, especially a termination or joint in power cables, employs two overlapping layers of semiconductive material that have different a.c. electrical impedance characteristics which surround the region. The inner layer may be a heat-shrinkable tube 16 having a linear characteristic, and the outer layer may have a non-linear characteristic and be provided as an internal coating 18 on a further heat-shrinkable tube 20 of insulating material. Such an arrangement provides good electrical protection in terms of both a.c. and impulse performance. <IMAGE> |
