【Daily Topic】【Electrical Edition 20170309】
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Participation reward: 2 Wealth. Correct reward: 8 Wealth. Multiple-choice question: For a time relay with electrical activation, what is the operating behavior of its delay contacts? A. The contacts operate with a delay when the coil is powered, and instantaneously when it is de-energized. B. The contacts operate instantly when the coil is powered, and with a delay when it is de-energized. C. The contacts do not operate when the coil is powered, but operate instantaneously when it is de-energized. D. The contacts do not operate when the coil is powered, but operate with a delay when it is de-energized. A
A. The contacts operate with a delay when the coil is powered, and instantaneously when the power is cut off
For a power-on delay time relay, the operating behavior of its delay contacts is (A)
B. The contacts act instantaneously when the coil is powered, and they act with a delay when the power is cut off