20151216 One question per day
Thread Content
20151216 Daily Question: The rewards are as follows: 1-3 points for participation, 5 points for a correct answer, and 8-10 points for a correct answer accompanied by an analysis. When three-phase four-wire power distribution is used, what is the cross-sectional area of the neutral wire in a thyristor dimming device? A. Half of the phase wire’s cross-sectional area B. 1 time the phase wire’s cross-sectional area C. 2 times the phase wire’s cross-sectional area D. 2.5 times the phase wire’s cross-sectional area C
When three-phase four-wire power distribution is used, the cross-sectional area of the neutral wire for the thyristor dimming device is (A). A. Half of the phase wire cross-sectional area B. 1 time the phase wire cross-sectional area C. 2 times the phase wire cross-sectional area D. 2.5 times the phase wire cross-sectional area
When three-phase four-wire power distribution is used, the cross-sectional area of the neutral wire in a thyristor dimming device is (2 times the cross-sectional area of the phase wire). A. Half of the phase wire cross-section B. 1 time the phase wire cross-section
When three-phase four-wire power distribution is used, the cross-sectional area of the neutral wire for the thyristor dimming device is (C). A. Half of the phase wire cross-sectional area B. 1 time the phase wire cross-sectional area C. 2 times the phase wire cross-sectional area D. 2.5 times the phase wire cross-sectional area. In three-phase four-wire or two-phase three-phase power distribution systems with thyristor dimming, the cross-sectional area of the neutral wire should be no less than 2 times that of the phase wires!
When three-phase four-wire power distribution is used, the cross-sectional area of the neutral wire in a thyristor dimming device is (2 times the cross-sectional area of the phase wire).
When three-phase four-wire power distribution is used, the cross-sectional area of the neutral wire for the thyristor dimming device is (C). A. Half of the phase wire cross-sectional area B. 1 time the phase wire cross-sectional area C. 2 times the phase wire cross-sectional area D. 2.5 times the phase wire cross-sectional area