D-F英语词汇发电机组专业术语

1、dead busdead bus refers to the de-energized state of the power connections between outputs of paralleled generator sets. the term bus in this usage can either be rigid solid bus bars or insulated flexible cables.不带电母排，是指连接并联发电机组输出之间的电力连接处于不带电状态。这里 所指的母排可能是坚硬的实心汇流条，也可能是柔韧的绝缘电缆。delta connectiondelta c

2、onnection refers to a three phase connection in which the start of each phase is connected to the end of the next phase, forming the triangle-shaped greek letter delta. the load lines are connected to the corners of the triangle三角形连接，是指在三相连接中，相临两相首尾相连，构成三角形的希腊字母 delta,负荷线连接在三角形的角上。differential relay

3、a differential relay is a protective device that is fed by current transformers located at two different series points in the electrical system. the differential relay compares the currents and picks up when there is a difference in the two, which signifies a fault in the zone of protection. these d

4、evices are typically used to protect windings in generators or transformers 差动继电器。作为保护装置，差动继电器由位于系统中两个不同位置的电流互感 器提供反馈信息。差动继电器对电流进行比较，如果存在不同则表示受保护区域 内有故障存在。这些装置常被用于保护发电机或变压器的线圈。digital master control (dmc)this device is designed to control the power systems in a facility. it is offered as an option o

5、n cummins switchgea匸数字主控制器，是用于控制设备电力系统的装置。在康明斯开关柜中数字主控制 器是选配件。direct current (dc)direct current is current with no reversals in polarity直流，是指没有正负极性往复变化的电流。distributed control systema collection of nodes that interact to control a system whose components are spread out over some distance. each node h

6、as intelligence for operating its own particular component of the system. different parts of the system communicate status and control information with one another to form a distributed control system. typically, they communicate on a peer-topeer level. this is different from a type of system where

7、all control and interaction between components is dictated by one central control. this is a common master/slave arrangement.分布式控制系统，是由分布在不同位置但互相作用的节点构成。每个节点具有智 能，可以对各自系统操作控制。系统不同部分之间的通信状态和控制信息交流构 成了分布式控制系统，这种系统内的通信是点对点方式，有别于所有的控制以及 组成部分之间的通信都由一个中央控制器完成的系统。distribution circuit breakera distribution

8、circuit breaker is a device used for overload and short current protection of loads connected to a main distribution device.配电线路开关，是给连接在主配电设备上的负荷提供过载和短路保护的装置。droop load sharingdroop load sharing is a method of making two or more parallel generator sets share a system kw load this is accomplished by

9、having each governor control adjusted so that the sets have the same droop (reduction of speed). typical droop is two cycles infrequency from no load to full load转速降负荷分配，是两台或多台机组负荷分配的一种方法。这通过每台并联机组调速器具备相同的转速降。从空载到满载转速降一般为两赫兹ee伍ciency (eff)efficiency is the ratio of energy output to energy input, suc

10、h as the ratio between the electrical energy input to a motor and the mechanical energy output at the shaft of the motoi;效率，是输出能量与输入能量的比率，例如输入到电动机的电能与电机轴承输出 的机械能的之间的比率。emergency systeman emergency system is independent power generation equipment that is legally required to feed equipment or systems

11、whose failure may present a life safety hazard to persons or property.应急系统，是指根据相关法规要求，为那些可能会危及生命安全或造成财产重大 损失的设备或系统提供电源的独立发电设备。energyenergy is manifest in forms such as electricity, heat, light and the capacity to do work. it is convertible from one form to another, such as in a generator set, which

12、converts rotating mechanical energy into electrical energy. typical units of energy are kw/h, btu (british thermal unit), hp/h, ft/lbf, joule and calorie.能量，以电能、热能、光能等形式存在，可以做功，也可以从一种形式转换为另 一种形式，例如发电机组能把机械能转变为电能。经常用的能量单位有：千瓦/小 时、英国热量单位、马力/小时、焦耳、卡等。ffaulta fault is any unintended flow of current outs

13、ide its intended circuit path in an electrical syste m.故障，是指在电力系统中任何电流跑出正常电路以外的情况。feeder circuit breakersee distribution circuit breaker.馈电线路开关。见“配电线路开关”。fiber optic cablea technology using glass or plastic threads (fibers) to transmit data. a fiber optic cable is a bundle of either glass or plastic

14、 threads capable of transmitting messages modulated into light waves typically, fiber optic cable has greater bandwidth allowing them to carry more data than metal wires. fiber optic cable is lighter and less susceptible to interference than metal wires. also, data can be transmitted digitally rathe

15、r being transformed into analog data for transmission as is the case with metal wires when used for computer data transmission. fiber optics are becoming increasingly more common for use with local-area networks (lans)光缆，是指使用玻璃或塑料束(光纤)来传输数据。光纤是一束可以用来传递被 调制成光波的信息的玻璃或塑料管。与金属电线相比，光缆的特点是带宽更大， 质量更轻，可以传导更

16、多数据，抗干扰性能更好，并且数据是以数字形式而不是 模拟形式传播。光缆在局域网领域的使用越来越普遍。first start sensora first start sensor is an electronic device within some paralleling equipment that senses generator set and bus voltage and frequency, and determines whether or not a generator set is the first unit ready to close to the bus follow

17、ing a call to start under "black start" conditions 首启动传感器，是应用于某些并联设备中的电子装置，功能是感知发电机组和母 排的电压、频率，判断哪个机组在接到“黑启动”信号后第一个可以合到母排。 frequencyfrequency is the number of complete cycles per unit of time of any periodically varying quantity, such as alternating voltage or current. it is usually expres

18、sed as (hz) hertz or cps (cycles per second).频率，是指周期性变化的事物(如交流电压和电流等)在单位时间内完成的周期 数，常用单位是赫兹(hz)或周期/秒(cps)0frequency adjust potentiometera frequency adjust potentiometer is used to manually bring the frequency (speed) of the incoming set to that of the bus for synchronizing purposes when the generator set is paralleled, operation of this potentiometer will adjus