IEEE 48:1975 pdf download.IEEE Standard Test Procedures and Requirements for High-V oltage 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 [l].
Cable terminations and component parts shall be capable of withstanding the tests specified in this standard.
2. Service Conditions
2.1 Standard Service Conditions. Devices conforming to this standard shall be capable of successful operation under the following service conditions.
2.1.1 Physical Conditions
(1) Temperature:
(a) The temperature of the cooling medium (ambient temperature) is not less than -30°C nor more than + 40°C.
(b) The temperature of the cooling medium (ambient inside enclosure) does not exceed 55°C for apparatus terminations. The devices designed for this service will be connected to the equipment bus which may. at full load, reach a total temperature of 85°C.
NOTE: IEEE Std 55-1953. Guide for Temperature Correlation in the Connection of Insulated Wire and Cables to Electric Equipment has been prepared for such applications. It is recommended that this guide, as well as the limiting cable conductor temperatures established by AEIC,’ IPCEA.’ and other industry accepted committees be reviewed before selecting the size and type of cable and the associated apparatus cable termination. See Section 9. Bibliography.
(2) The altitude does not exceed 1000 m (3300 ft) where atmospheric air is part of the thermal or dielectric system or both.
2.1.2 System Conditions. The nominal power system frequency is not less than 25 Hz nor more than 60 Hz.
2.2 Nonstandard Service Conditions. The following service conditions may require special consideration in the design or application of the cable terminations, and should be called to the attention of the manufacturer.
2.2.1 Physical Conditions
(1) Ambient temperatures less than 30°C and more than + 40°C.
(2) Altitude exceeding 1000 m (3300 ft) where atmospheric air is part of the thermal or dielectric system or both. (See Section 8.Application Guide.)
(3) Damaging fumes or vapors, excessive or abrasive dust, explosive mixtures of dust or gases, steam, salt spray, excessive moisture or dripping water, etc.
(4) Unusual mechanical conditions such as:vibration, shock, cantilever loading, wind loading, icing, etc.
(5) Unusual transportation or storage conditions.
(6) Unusual space limitations.
(7) Unusual internal pressures.
(8) Unusual maintenance difficulties.
2.2.2 System Conditions
(1) Nominal power system frequency less than 25 Hz or more than 60 Hz.
(2) Poor system voltage waveforms having voltage crest (peak instantaneous) to rms ratios in excess of 2.12.
(3) Unbalanced voltages.
(4) Magnetic forces associated with high momentary currents that may cause abnormal physical strain or internal forces.
IEEE 48 pdf download.