安装，更换和修复照明灯具和电气控制及配电设备，如开关，继电器和断路器面板。
Install, replace and repair lighting fixtures and electrical control and distribution equipment, such as switches, relays and circuit breaker panels.
铁路安全继电器是铁路系统中的重要执行元件，必须定期对其电气特性进行测量。
The railway safety relay is an important executable component in railway system, whose electrical characteristics must be tested timely.
电气参数和机械参数是影响小型继电器直流电弧开断性能的主要因素。
Electric and mechanism parameters are the main factors influencing the direct current arc breaking performance of small relays.
铁路安全继电器需要测试的主要电气参数包括：工作值、释放值、反向工作值等。
The electrical characteristics of railway safety relay are mainly involved with operating value, releasing value, reversing value and so on.
在现代机床电气系统中，保压回路的控制方式可以通过继电器——接触器控制和可编程控制器PLC实现。
In electronic systems of modern machine tool, the control way of circuits of keeping pressure is able to be completed by the relay - toucher and the PLC.
介绍了进口纺织设备上传感器、继电器、接触器、电动机等电气器件的修复和国产化替代方面的生产实践。
This paper introduces the fault restoration of sensor, relay, contactor and electromotor of imported textile machines and the production practice of substitution of the devices made in China.
电路板往往被置于从电气上控制继电器开路和闭合的设备上。
The boards are often placed in a mainframe that electronically controls the opening and closing of the relays.
我国矿井提升绞车大多是采用交流异步电机拖动，其电气控制系统采用转子串、切电阻调速，由继电器-接触器构成逻辑控制装置。
China's mines are hoist AC Induction Motor Drive, and its electrical control system uses a rotor series, cutting speed resistance , by the relay - contactor control devices constitute a logical.
电气线路中多采用带铁芯的电感线圈如变压器、继电器等。
Most of iron-core inductance coils are used in electrical circuit, such as transformer, relay, etc.
另一个例子是，继电器，电气载开关。
Another example is the relay, an electrically-carrying switch.
绞线机、合绳机电气控制设备中的时间继电器故障率较高，是影响这类设备正常运行的主要原因。
Higher fault rate of time relay in the electricity control apparatus of strander and closer is the main reason causing this kind of equipment to work off normal.
目前，我国的缩水机电气控制系统普遍采用的是传统的继电器—接触器控制方式。
Currently, the country's shrinking machine electrical control system is widely adopted in the traditional relay - access control methods.
分析了箱式电阻炉电气系统的工作原理及其局限性，介绍了采用交流固态继电器对电气系统进行改造的原理和实践。
This paper analyzed the working principle and limitation of electrical system of box resistor-stove. And introduced the principle and practice to remake this system with ac SSR.
一般认为气体密度继电器可以正确反映气体绝缘电气设备的气体密度，而压力继电器则不能。
It is recognized that the gas density relay can reflex the gas density in gas insulated electric equipment correctly and the pressure relay cant do the same.
本系列液压机具有继电器控制PLC控制俩种电气控制系统，有调整、手动及半自动三种操作方式。
The hydraulic machines are equipped with two electric control systems-relay and PLC, and three operation modes-mechanic, manual and semi-automatic.
在铁路车站信号控制领域，目前应用最广的是6502电气集中和以继电器为执行机构的计算机联锁系统。
Nowadays the 6502 electric centralization and the computer interlocking system with actuator of relays are widely applied in the railway signal control system.
在分析和设计继电器-接触器控制电路时，往往忽视临界竞争现象，结果造成电气控制达不到预期目的，甚至造成事故。
In the practice of analyzing and designing of relay-contactor circuits, the critical-competition phenomenon is usually ignored, causing failures in reaching the intended purpose or even damages.
在分析和设计继电器-接触器控制电路时，往往忽视临界竞争现象，结果造成电气控制达不到预期目的，甚至造成事故。
In the practice of analyzing and designing of relay-contactor circuits, the critical-competition phenomenon is usually ignored, causing failures in reaching the intended purpose or even damages.
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