所谓失压和欠压保护就是当电源停电或者由于某种原因电源电压降低过多(欠压)时,保护装置能使电动机自动从电源上切除。因为当失压或欠压时,接触器线圈电流将消失或减小,失去电磁力或电磁力不足以吸住动铁心,因而能断开主触头,切断电源。
... loss of power功率损失 loss of pressure失压 loss of profits insurance利润损失保险 ...
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... 西区高层4栋602 » The Western high-rise building 4 失压 » Voltage loss 一所学校 » A school ...
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保定市电力互感器厂--普通电流互感器结构原理 关键词] 计量; 电压互感器; 失压 [gap=604]Key words : metering; voltage transformer; voltage losing
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失压保护试验是什么时候进行的,有试验报告吗?
When was the no-voltage protection test carried out? It there any test report.
在客舱突然失压的情况下,面罩会从天花板上脱落。
In the event of a sudden loss of cabin pressure, masks will descend from the ceiling.
乘客在起飞前总是被告知,如果突然失压要戴上面罩。
Passengers are always told before flying to put on the masks in case of a sudden loss of air pressure.
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