IEEE Std 1732-2017 pdf download – IEEE Recommended Practice for Space Charge Measurements on High- Voltage Direct-Current Extruded Cables for Rated Voltages up to 550 kV.
3. Defnitions, acronyms, and abbreviations 3.1 Defnitions For the purposes of this document, the following terms and defnitions apply. The IEEE Standards Dictionary Online should be consulted for terms not defned in this clause. 2 cable loop: See: test loop. cable system: Cables with installed accessories. Cable accessories are typically joints and terminations. There may be other types of accessories associated with a cable system (e.g., measuring devices or fxtures). These need only to be incorporated in the test objects to the extent that they are deemed to have an impact on the operational characteristics of the cable system (adapted from CIGRÉ Technical Brochure [TB] 496:2012, page 6, 1.5.1). compensation cable: Cable that serves for compensating the polarization and conduction currents of the measured cable subjected to space charge measurements with the thermal step method and has identical capacitance to the measured cable (for more details, see Annex B). compensation cable loop: Compensation cable arranged in a cable loop with two terminations. depolarization time: Time starting—after voltage removal—as soon as the cable conductor has been short- circuited and grounded. full-size cables: Cables of the same size, design, and rated voltage as the power cables installed in the feld. load cycle test: Part of the electrical type tests for dc extruded cable systems for power transmission at a rated voltage up to 550 kV (adapted from CIGRÉ TB 496:2012, page 19, 4.4.2).
positive voltage poling time: Poling time in case that the polarity of the voltage applied between the cable conductor and the grounded cable metal sheath is positive. prequalifcation test: Test made before supplying, on a general commercial basis, a type of dc extruded cable system for power transmission at a rated voltage up to 550 kV in order to demonstrate satisfactory long-term performance of the complete cable system (adapted from CIGRÉ TB 496:2012, page 5, 1.4). The prequalifcation test consists of (see CIGRÉ TB 496:2012, page 14, 3.2): a) Long-duration voltage test (see CIGRÉ TB 496:2012, page 14, 3.4) b) Superimposed impulse voltage test (see CIGRÉ TB 496:2012, page 15, 3.5) c) Examination (see CIGRÉ TB 496:2012, page 16, 3.6) space charge: Electric charge locally present within the insulation wall that modifes the internal, radial electric feld. space charge measurement: Measurement of the radial electrical space charge distribution, through the extruded cable insulation, detected using calibrated electro-acoustic or thermal pulses. test loop: A combination of series connected test objects (consisting of cable lengths and accessories) simultaneously under test, as defned in CIGRÉ TB 496:2012, page 6, 1.5.1, and page 7, 1.5.2. type tests: Tests made before supplying on a general commercial basis a type of cable system in order to demonstrate satisfactory performance characteristics to meet the intended application (adapted from CIGRÉ TB 496:2012, page 5, 1.4). volt-of measurement: Space charge measurement performed during depolarization time. volt-on measurement: Space charge measurement performed during poling time.