D-F英語詞匯發(fā)電機(jī)組專業(yè)術(shù)語

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.不帶電母排，是指連接并聯(lián)發(fā)電機(jī)組輸出之間的電力連接處于不帶電狀態(tài)。這里 所指的母排可能是堅(jiān)硬的實(shí)心匯流條，也可能是柔韌的絕緣電纜。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三角形連接，是指在三相連接中，相臨兩相首尾相連，構(gòu)成三角形的希臘字母 delta,負(fù)荷線連接在三角形的角上。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 差動繼電器。作為保護(hù)裝置，差動繼電器由位于系統(tǒng)中兩個(gè)不同位置的電流互感 器提供反饋信息。差動繼電器對電流進(jìn)行比較，如果存在不同則表示受保護(hù)區(qū)域 內(nèi)有故障存在。這些裝置常被用于保護(hù)發(fā)電機(jī)或變壓器的線圈。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匸數(shù)字主控制器，是用于控制設(shè)備電力系統(tǒng)的裝置。在康明斯開關(guān)柜中數(shù)字主控制 器是選配件。direct current (dc)direct current is current with no reversals in polarity直流，是指沒有正負(fù)極性往復(fù)變化的電流。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.分布式控制系統(tǒng)，是由分布在不同位置但互相作用的節(jié)點(diǎn)構(gòu)成。每個(gè)節(jié)點(diǎn)具有智 能，可以對各自系統(tǒng)操作控制。系統(tǒng)不同部分之間的通信狀態(tài)和控制信息交流構(gòu) 成了分布式控制系統(tǒng)，這種系統(tǒng)內(nèi)的通信是點(diǎn)對點(diǎn)方式，有別于所有的控制以及 組成部分之間的通信都由一個(gè)中央控制器完成的系統(tǒng)。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.配電線路開關(guān)，是給連接在主配電設(shè)備上的負(fù)荷提供過載和短路保護(hù)的裝置。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轉(zhuǎn)速降負(fù)荷分配，是兩臺或多臺機(jī)組負(fù)荷分配的一種方法。這通過每臺并聯(lián)機(jī)組調(diào)速器具備相同的轉(zhuǎn)速降。從空載到滿載轉(zhuǎn)速降一般為兩赫茲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，是輸出能量與輸入能量的比率，例如輸入到電動機(jī)的電能與電機(jī)軸承輸出 的機(jī)械能的之間的比率。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.應(yīng)急系統(tǒng)，是指根據(jù)相關(guān)法規(guī)要求，為那些可能會危及生命安全或造成財(cái)產(chǎn)重大 損失的設(shè)備或系統(tǒng)提供電源的獨(dú)立發(fā)電設(shè)備。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，以電能、熱能、光能等形式存在，可以做功，也可以從一種形式轉(zhuǎn)換為另 一種形式，例如發(fā)電機(jī)組能把機(jī)械能轉(zhuǎn)變?yōu)殡娔堋＝?jīng)常用的能量單位有：千瓦/小 時(shí)、英國熱量單位、馬力/小時(shí)、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，是指在電力系統(tǒng)中任何電流跑出正常電路以外的情況。feeder circuit breakersee distribution circuit breaker.饋電線路開關(guān)。見“配電線路開關(guān)”。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)光纜，是指使用玻璃或塑料束(光纖)來傳輸數(shù)據(jù)。光纖是一束可以用來傳遞被 調(diào)制成光波的信息的玻璃或塑料管。與金屬電線相比，光纜的特點(diǎn)是帶寬更大， 質(zhì)量更輕，可以傳導(dǎo)更

16、多數(shù)據(jù)，抗干擾性能更好，并且數(shù)據(jù)是以數(shù)字形式而不是 模擬形式傳播。光纜在局域網(wǎng)領(lǐng)域的使用越來越普遍。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 首啟動傳感器，是應(yīng)用于某些并聯(lián)設(shè)備中的電子裝置，功能是感知發(fā)電機(jī)組和母 排的電壓、頻率，判斷哪個(gè)機(jī)組在接到“黑啟動”信號后第一個(gè)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).頻率，是指周期性變化的事物(如交流電壓和電流等)在單位時(shí)間內(nèi)完成的周期 數(shù)，常用單位是赫茲(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