IEEE 48-1975 pdf free.IEEE Standard Test Procedures and Requirements for High-Voltage Alternating-Current Cable Terminations.
IEEE 48 covers all indoor and outdoor cable terminations used on alternating-current cables having laminated or extruded insulation rated 2.5 kV through 500 kV, except separable insulated connectors which are covered by 111.
Cable terminations and component parts shall be capable of withstanding the tests specified in this standard.
The rating of a high-voltage cable termination shall include the following items. where applicable:
BIL (basic lightning impulse insulation level). The crest value of a lightning impulse voltage of a specified wave shape which the high-voltage cable termination is required to withstand under specified conditions.
BSL (basic switching impulse insulation level). The crest value of a switching impulse voltage of a specified wave shape which the high-voltage cable termination is required to withstand under specified conditions.
insulation class. The nominal phase-to-phase operating voltage of a three-phase cable systern where the device may be applied, and reflects the associated design tests and impulse insulation levels.
maximum and minimum cable conductor diameter. The largest and smallest cable conductor diameters that the high-voltage cable termination is designed to accommodate without special modifications.
maximum and minimum cable insulation diameter. The largest and smallest diameters over the insulation of round conductor cables. as measured by a circumferential tape, that the high-voltage cable termination is designed to accommodate without special modifications.
maximum design voltage to ground. The maximum voltage at which the high voltage cable termination is designed to operate continuously under normal conditions.
NOTE: It is not intended that this maximum voltage limit be applied to transient overvoltages or unusual service operating conditions where the system voltage may exceed those values for only short periods of time.