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请各位大佬帮帮忙译一下下面的句子:不胜感激!
DVB.1.5 The acceptability of a test circuit, including the generator or other source of supply, for testing with tungsten-filament lamps shall be determined by means of oscillograph studies. The current-inrush factor of eight mentioned in DVB.1.1 shall be based on a normal current flow of 20 A, and testing equipment that has adequate capacity at 20 A shall be acceptable for testing switches rated at more than 20 A. With reference to a 60 Hz timing wave, the peak value of the inrush current as shown by the oscillograms shall be attained within 1/4 cycle.
DVB.1.6 The characteristics of a d.c. test circuit shall be determined from 12 or more oscillograms. The testing equipment shall be considered acceptable if not less than, half the oscillograms show a current-inrush factor equal to or greater than the minimum acceptable current-inrush factor.
DVB.1.7 The characteristics of an a.c. test circuit shall be determined from 12 or more oscillograms. Oscillograms in which the absolute value of the current is decreasing (i.e.the value in question is approaching the zero point) shall be disregarded. The observed peak values of 12 or more oscillograms taken when the absolute value of the current is increasing shall be sufficient to determine whether the capacity of the test circuit is adequate to produce the required current-inrush factor.
DVB.1.8 A tungsten-filament-lamp load used as the load for a switch shall contain the smallest possible number of lamps having standard ratings of not more than 500 W. It is acceptable to use fewer lamps, as long as each one is rated more than 500 W. The OPERATING CYCLE shall be such that the lamps are off for at least 55 s of each test cycle. If a switch is operated at the rate of 10 cycles per minute, at least 10 banks of lamps controlled by a commutator shall be used for each switch under test. |
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