ANSI C82.6-2005 pdf download American National Standard for lamp ballasts— Ballasts for High-Intensity Discharge Lamps – Methods of Measurement
3.0 DEFINITIONS Definitions of terms that apply specifically to the subject treated in this standard are given in ANSI C82.9 and C92.1. For additional definitions, see ANSI/IEEE 100. (1) Stiff Line: A stiff line is defined as a sine wave source that exhibits voltage regulation (change of rms voltage from no load to full load divided by rms voltage at full load) of no more than 0.5%.
4.0 GENERAL CONDITIONS FOR ELECTRICAL PERFORMANCE TESTS
4.1 Power supply. Except for the testing of ballasts designed for use on constant- current supply circuits, the AC voltage supply at the input terminals to the ballast-and-lamp combination shall, throughout the full range of test requirements, have a wave shape such that the rms (root-mean-square) summation of the harmonic components will not exceed 3% of the fundamental component. The impedance of the power source, as measured at the point where the ballast-and-lamp combination is connected, shall not exceed 3% of the ballast impedance. Variable autotransformers or other voltage transformation devices used in the circuits shall have a power rating at least five times the wattage of the lamp intended to be operated on the ballast under test.
4.2 Ballast Conditions. For normal operational tests, the ambient temperature and the temperature of the ballast under test shall be 25 ο C ± 5 ο C. 4.3 Lamp Position. The lamp position, both for the measurement in the referenceballast circuit and for the measurement of the commercial ballast being tested, shall be vertical base up unless otherwise designated by the lamp or commercial ballast manufacturer. The characteristics of lamps operating on reference ballasts have been established for vertical and or horizontal operation, the lamp positions most commonly used in ballast measurement work. When a lamp is operated in other than a vertical position the measurement becomes more complicated, and the method outlined in ANSI C78.389 should be followed carefully.