The paper discusses several problems which are commonly encountered while applying uninterruptable power , such as : parallel power feed , leakage , switch - on or generator switch - on , parallel connection of ups and redundancy 摘要对不间断电源使用过程中经常遇到的几个问题,如双路供电、漏电、开关及发电机接入、 ups的并联及冗余等问题进行了简单的探讨。
Compared with the old switch - on circuit , it has many excellent features . using the spi interface , the area of pcb and the interfaces of mcu are both saved . moreover , mc33884 has the advantages in temperature and disturbance resisting 更重要的是在抗干扰和温度适应方面, mc33884芯片均有较以前开关量输入电路有优势,这样开关量输入电路的可靠性有了明显的提高。
We introduce in detail the circuit current and voltage when the relay is switch - on and switch - off , and make the software in dos and windows . the equipment can dynamic shows the wave of the current and voltage when the relay is switch - on and switch - off 在检测方面,分别完成了dos和windows平台控制软件设计,实现了继电器触点闭合与打开时的电压、电流波形的动态显示功能。
According to the environment of using the car relay , we conclude the condition of switch - on and switch - off of the relay , and make the computer test and control equipment . the theme introduces the simulative load and the design of the equipment hardware 并研制了以工业控制计算机为中心的车用继电器电寿命试验装置。介绍了电寿命试验装置的模拟负载和计算机测控部分的硬件设计。
The two analytic examples show that : if the heating and moistening due to convection at the switch - on point is much smaller than all the other terms in the tendency equation , then keeping the " on - off " switches the same as the basic state will produce the right tangent linear model and adjoint model 两个解析的例子表明:只要“开关”处的对流引起的加热和加湿远小于倾向方程的其它项,则保持“开关”变量与基态一致,能够正确得到切向线性模式和伴随模式。
Urban group , the largest property asset and facility management group in hong kong lights up the central shopping hub of tsimshatsui on 18th november through its 2004 christmas lighting switch - on ceremony cum park lane shopping carnival launching ceremony at the park lane shopper s boulevard 日前于尖沙咀柏丽购物大道举行星光下的东方之珠柏丽购物显缤纷2004年圣诞灯饰亮灯仪式暨柏丽购物嘉年华开幕典礼,为尖沙咀弥敦道中心地区带来色彩缤纷的圣诞气氛和多姿多采的购物环境。
Under operation system of dos and windows , control software is developed respectively . the wave of voltage and current as the ac contactors switch - on and switch - off is displayed dynamically , which make the equipment not only used as general electric life test instrument , but can apply test date for contactor study 在控制软件方面,分别完成dos平台和windows平台控制软件设计,实现了交流接触器触点闭合与断开时刻电压、电流波形动态显示功能,使该装置不仅能作为交流接触器常规电寿命试验装置,还对接触器触点的研究提供必要的试验数据。