發(fā)電機(jī)組專業(yè)術(shù)語中英文對(duì)照大全.doc

發(fā)電機(jī)組專業(yè)術(shù)語中英文對(duì)照大全AAC Alternating Current (AC) is electric current that alternates between a positive maximum value and a negative maximum value at a characteristic frequency, usually 50 or 60 cycles per second (Hertz). 交流 交流是指電流在正負(fù)最大值之間以特定的頻率變動(dòng)，通常頻率為50或60赫茲。 ANSI American National Standards Institute. 美國(guó)國(guó)家標(biāo)準(zhǔn)協(xié)會(huì) 美國(guó)國(guó)家標(biāo)準(zhǔn)協(xié)會(huì) Acoustic Material Acoustic material is any material considered in terms of its acoustic properties, especially its properties of absorbing or deadening sound. 聲音材料 聲音材料，特指有吸音或隔音特性的材料。 Active Power Active power is the real power (kW) supplied by the generator set to the electrical load. Active power creates a load on the generator sets engine and is limited by the horsepower of the engine. Active power does the work of heating, turning motor shafts, etc. 有功功率 有功功率（kW），是指發(fā)電機(jī)組實(shí)際供應(yīng)給負(fù)載的功率，它由發(fā)電機(jī)組的發(fā)動(dòng)機(jī)提供，受到發(fā)動(dòng)機(jī)馬力大小的限制。發(fā)熱和驅(qū)動(dòng)馬達(dá)轉(zhuǎn)動(dòng)靠有功功率完成。 Air Circuit Breaker An air circuit breaker automatically interrupts the current flowing through it when the current exceeds the trip rating of the breaker. Air is the medium of electrical insulation between electrically live parts and grounded (earthed) metal parts. 空氣線路斷路器 空氣線路斷路器的功能是當(dāng)電流大小超過斷路器的過流跳脫設(shè)定值后自動(dòng)斷開?？諝馐菐щ娏慵徒拥亟饘倭慵g的絕緣介質(zhì)。 Alternator Alternator is another term for AC generator. 交流發(fā)電機(jī) 交流發(fā)電機(jī) Amortisseur Windings The amortisseur windings of a synchronous AC generator are the conductors embedded in the pole faces of the rotor. They are connected together at both ends of the poles by end rings or end plates. Their function is to dampen waveform distortion during load changes. 阻尼線圈 同步交流發(fā)電機(jī)的阻尼線圈是指嵌繞在轉(zhuǎn)子磁極間的導(dǎo)線，他們分別在兩極用端環(huán)或端板相連接，主要功能是減弱因負(fù)載變化而引起的波形畸變。 Ampacity Ampacity is the safe current-carrying capacity of an electrical conductor in amperes as defined by code. 載流容量 載流容量是以安培數(shù)來定義導(dǎo)線安全載流能力。 Ampere The ampere is a unit of electric current flow. One ampere of current will flow when a potential of one volt is applied across a resistance of one ohm. 安培 安培是電流單位。1伏電壓作用于1歐姆的電阻上就會(huì)產(chǎn)生1安培的電流。 Annunciator An annunciator is an accessory device used to give remote indication of the status of an operating component in a system. Annunciators are typically used in applications where the equipment monitored is not located in a portion of the facility that is normally attended. The NFPA has specific requirements for remote annunciators used in some applications, such as hospitals. 指示器 指示器作為一個(gè)附屬裝置常用于遠(yuǎn)程顯示系統(tǒng)的各個(gè)組成部分的運(yùn)行狀態(tài)。指示器通常使用在監(jiān)測(cè)設(shè)備不在設(shè)備現(xiàn)場(chǎng)的應(yīng)用。美國(guó)國(guó)家防火協(xié)會(huì)對(duì)指示器在某些行業(yè)的應(yīng)用有特殊要求，例如醫(yī)院等。 Apparent Power Apparent power is the product of current and voltage, expressed as kVA. It is real power (kW) divided by the power factor (PF). 視在功率 視在功率是電流和電壓共同作用的產(chǎn)物，用kVA表示。它等于有功功率（kW）除以功率因數(shù)。 Armature The armature of an AC generator is the assembly of windings and metal core laminations in which the output voltage is induced. It is the stationary part (stator) in a revolving-field generator. 電樞 交流發(fā)電機(jī)電樞的是金屬芯和繞組的總成，產(chǎn)生感應(yīng)電壓。電樞是旋轉(zhuǎn)磁場(chǎng)交流發(fā)電機(jī)的不動(dòng)部分（定子）。BBackup Protection Backup protection consists of protective devices, which are intended to operate only after other protective devices have failed to operate or detect a fault. 后備保護(hù)裝置 后備保護(hù)裝置是在其他保護(hù)裝置動(dòng)作失敗或發(fā)生故障時(shí)動(dòng)作的保護(hù)裝置。 Bandwidth The amount of data that can be transmitted in a fixed amount of time. For digital devices, it is expressed as bits per second, or bytes per second. For analog devices, it is usually expressed as cycles per second, or Hertz. 帶寬 在固定時(shí)間內(nèi)可傳輸?shù)臄?shù)據(jù)量。在數(shù)字化設(shè)備中以位/秒或字秒表示，在模擬（數(shù)字）設(shè)備中以周/秒或者赫茲表示。 Base Load Base load is that portion of a building load demand which is constant. It is the base of the building demand curve. 基本負(fù)荷 基本負(fù)荷是指建筑負(fù)荷需求量中不變的那一部分，是構(gòu)成負(fù)荷需求曲線的基數(shù)。 Baud Rate The speed of data transmission in serial data communications approximately equal to the number of code elements (bits) per second (BPS). Bits per second are also termed BPS, with the prefix (k) denoting thousands. 波特率 串行數(shù)據(jù)傳輸速率，約等于每秒鐘傳輸?shù)谋忍財(cái)?shù)。比特/秒也可以用BPS表示，kBPS表示千比特/秒。 Binding The process of making the logical connections to the network (also called connecting). This involves connecting network variable outputs to network variable inputs using LonWorks software. 綁定 與網(wǎng)絡(luò)進(jìn)行邏輯連接的過程（也可以叫做連接），包括把輸出變量與輸入變量用LonWorks軟件綁定。 Bit Binary Digit. 位 2進(jìn)制數(shù)字 Black Start Black Start refers to the starting of a power system with its own power sources, without the assistance from external power supplies. 黑啟動(dòng) 黑啟動(dòng)是指依靠系統(tǒng)內(nèi)部的電源，而不借助外部的電力進(jìn)行的啟動(dòng)。 Boolean A logical system used to express one of two states, such as on or off (yes or no, 1 or 0, etc.) 布爾類型 用于表示2種狀態(tài)之一的邏輯系統(tǒng)，例如開或關(guān)（是或否，1或0等）。 Bus Capacity Bus capacity is the maximum load that can be carried on a system without causing degradation of the generator frequency to less than a prescribed level (usually 59 Hz in a 60 Hz system). 母排容量 母排容量是指在發(fā)電機(jī)頻率不被壓低的情況下，系統(tǒng)所能帶動(dòng)的最大負(fù)載。CCT (Current Transformer) Current transformers are instrument transformers used in conjunction with ammeters, control circuits and protective relaying. They usually have 5 ampere secondaries. 電流互感器 電流互感器是一種儀表變壓器，通常與電流表、控制電路、保護(hù)繼電器配套使用。 Circuit A circuit is a path for an electric current across a potential (voltage). 電路 電路是電流通過電勢(shì)（電壓）的路徑。 Circuit Breaker A circuit breaker is a protective device that automatically interrupts the current flowing through it when that current exceeds a certain value for a specified period of time. See Air Circuit Breaker, Main Breaker, Molded Case Circuit Breaker and Power Circuit Breaker. 線路斷路器 線路斷路器是一個(gè)保護(hù)裝置，當(dāng)通過它的電流超過某個(gè)安全設(shè)定值一定時(shí)間后，它就能夠自動(dòng)切斷電流。（見空氣線路斷路器、主開關(guān)、塑殼線路斷路器等）。 Circulating Harmonic Currents Circulating Harmonic Currents are currents that flow because of differences in voltage waveforms between paralleled power sources, or induced by operation of non-linear loads. 諧波環(huán)流 諧波環(huán)流是由并聯(lián)電源間不同的電壓波形或者非線性負(fù)荷運(yùn)轉(zhuǎn)而產(chǎn)生的電流。 Continuous Load A continuous load is a load where the maximum current is expected to continue for three hours or more (as defined by the NEC for design calculations). 持續(xù)負(fù)荷 持續(xù)負(fù)荷是指使電流在3個(gè)小時(shí)或更長(zhǎng)時(shí)間（根據(jù)NEC的定義）內(nèi)需保持最大值的負(fù)荷。 Current Current is the flow of electric charge. Its unit of measure is the ampere. 電流 電流是電荷的流動(dòng)，以安培為單位。 Cycle A cycle is one complete reversal of an alternating current or voltage from zero to a positive maximum to zero again and then from zero to a negative maximum to zero again. The number of cycles per second is the frequency. 周期 周期是指交流電流或電壓從零到正最大值再到零，然后從零到負(fù)最大值再到零這樣一個(gè)往復(fù)的過程；而頻率則是指每秒可完成的周期數(shù)。 DDead Bus Dead 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 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 Connection Delta connection 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 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 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 devices are typically used to protect windings in generators or transformers. 差動(dòng)繼電器 作為保護(hù)裝置，差動(dòng)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(dòng)繼電器對(duì)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 on Cummins switchgear. 數(shù)字主控制器 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 直流是指沒有正負(fù)極性往復(fù)變化的電流。 Distributed Control System A collection of nodes that interact to control a system whose components are spread out over some distance. Each node has 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-to-peer level. This is different from a type of system where 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) 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(duì)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(duì)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 Breaker A distribution 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) 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 Sharing Droop load sharing is a method of making two or more parallel generator sets share a system kW load. This is accomplished by having each governor control adjusted so that the sets have the same droop (reduction of speed). Typical droop is two cycles in frequency from no load to full load. 轉(zhuǎn)速降負(fù)荷分配 轉(zhuǎn)速降負(fù)荷分配是兩臺(tái)或多臺(tái)機(jī)組負(fù)荷分配的一種方法。這通過每臺(tái)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。 EEfficiency (EFF) Efficiency is the ratio of energy output to energy input, such as the ratio between the electrical energy input to a motor and the mechanical energy output at the shaft of the motor. 效率 效率是輸出能量與輸入能量的比率，例如輸入到電動(dòng)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 System An emergency system is independent power generation equipment that is legally required to feed equipment or systems whose failure may present a life safety hazard to persons or property. 應(yīng)急系統(tǒng) 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(huì)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。 Energy Energy 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 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 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?。?jīng)常用的能量單位有：千瓦/小時(shí)、英國(guó)熱量單位、馬力/小時(shí)、焦耳、卡等。FFault A fault is any unintended flow of current outside its intended circuit path in an electrical system. 故障 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 Breaker See Distribution Circuit Breaker. 饋電線路開關(guān) 見“配電線路開關(guān)”。 Fiber Optic Cable A technology using glass or plastic threads (fibers) to transmit data. A fiber optic cable is a bundle of either glass or plastic 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 rather 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 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 Sensor A 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 following a call to start under black start conditions. 首啟動(dòng)傳感器 首啟動(dòng)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(dòng)”信號(hào)后第一個(gè)可以合到母排。 Frequency Frequency is the number of complete cycles per unit of time of any periodically varying quantity, such as alternating voltage or current. It is usually expressed as (Hz) Hertz or CPS (cycles per second). 頻率 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)。 Frequency Adjust Potentiometer A 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 adjust the kW load assumed by the generator set. 頻率調(diào)整電位器 頻率調(diào)整電位器是用于手動(dòng)調(diào)整輸入機(jī)組的頻率使之與母排同步。當(dāng)機(jī)組并聯(lián)后，電位器可以調(diào)整為機(jī)組輸出功率值。 Frequency Regulation Frequency regulation is a measure that states the difference between no-load and full-load frequency as a percentage of full-load frequency. 頻率調(diào)整率 頻率調(diào)整率是指空載和滿載之間頻率的差別與滿載頻率的百分比。GGateway A device that acts as an interface between two different communication protocols. The Network Gateway Module (NGM) provides a communication protocol that a PC can understand. Other gateway devices may be used to interface between our Lontalk protocol and other systems such as a SCADA or Building Automation System. Typically, a gateway becomes necessary when a SCADA or BAS does not have a driver developed for Lontalk. 網(wǎng)關(guān) 網(wǎng)關(guān)是兩個(gè)不同的通訊協(xié)議之間的接口，網(wǎng)關(guān)模塊（NGM）提供了個(gè)人電腦可理解的通訊協(xié)議。其他網(wǎng)關(guān)設(shè)施可能被用作我們的Lontalk 協(xié)議和其他系統(tǒng)（如SCADA或樓宇自動(dòng)化系統(tǒng)）之間的接口裝置。當(dāng)SCADA或樓宇自動(dòng)化系統(tǒng)沒有Lontalk的驅(qū)動(dòng)時(shí)，網(wǎng)關(guān)就是必不可少的。 Generator A generator is a machine which converts rotating mechanical energy into electrical energy. 發(fā)電機(jī) 發(fā)電機(jī)是把（旋轉(zhuǎn)）機(jī)械能轉(zhuǎn)化為電能的裝置。 Genset Communication Module (GCM) The GCM provides a communication gateway between the Model 3100 PowerCommand Control (PCCI) and the network. The GCM communicates with the PCCI control over a serial data link. The GCM gets data from the PCCI controls such as voltage, current, engine speed, oil temperature, etc. and then sends it out on the network if another network node is bound to it or requesting data. 機(jī)組通訊板 機(jī)組通訊板(GCM)是 PCC3100 控制器和網(wǎng)絡(luò)之間的通訊接口。GCM與PCC通過串行數(shù)據(jù)連接。GCM從PCC得到如電壓、電流、發(fā)動(dòng)機(jī)轉(zhuǎn)速、油溫等，再把它們發(fā)送給需要這些信息的網(wǎng)絡(luò)節(jié)點(diǎn)。 Governor A governor is a device on the engine which controls fuel to maintain a constant engine speed under various load conditions. The governor must have provision for adjusting speed (generator frequency) and speed droop (no load to full load). 調(diào)速器 調(diào)速器是安裝在發(fā)動(dòng)機(jī)上的一個(gè)裝置，在不同的負(fù)載條件下通過控制燃料量來保持發(fā)動(dòng)機(jī)的恒定轉(zhuǎn)速。調(diào)速器必須具備轉(zhuǎn)速調(diào)整（發(fā)電機(jī)頻率）和降速降調(diào)整（零負(fù)荷到滿負(fù)荷）功能。 Grid The utility-owned power distribution system. 電網(wǎng) 電網(wǎng)是指電廠的電力輸送系統(tǒng)。 Ground A ground is a connection, either intentional or accidental, between an electrical circuit and the earth or some conducting body serving in place of the earth. 接地 接地是電路與地渺幡巍懟啤笑桅痞兀地面上的導(dǎo)體的連接，可以是有意的也可以是意外的。 Ground Fault Protection This function trips (opens) a circuit breaker or sounds an alarm in the event that there is an electrical fault between one or more of the phase conductors and ground (earth). This ground fault protection function may be incorporated into a circuit breaker. 接地故障保護(hù) 當(dāng)一個(gè)或多個(gè)相導(dǎo)線與地之間出現(xiàn)電氣故障時(shí)，接地故障保護(hù)通過跳脫斷路器或報(bào)警來示警。這種功能可以一體化設(shè)計(jì)在斷路器上。HHertz (Hz) The term Hertz is the preferred designation for cycles per second (CPS) and is used to describe frequency. 赫茲 赫茲是頻率單位，也等于周期/秒(CPS)。 Hub A common connection point for devices or nodes in a network or sub-network. Hubs are commonly used to connect segments of a LAN and contain multiple ports. 分支器 分支器是網(wǎng)絡(luò)或子網(wǎng)絡(luò)中設(shè)備和接點(diǎn)的集線器，包含很多端口，一般應(yīng)用于連接局域網(wǎng)的分支。 Hunting Hunting is a phenomenon that can occur upon load changes in which the frequency or the voltage continues to rise above and fall below the desired value without reaching a steady-state value. It is caused by insufficient damping. 游車 游車是一種在負(fù)載變化引起的頻率、電壓高于或低于期望值，無法達(dá)到穩(wěn)定的現(xiàn)象。它是由于阻尼不足而造成的。IInsulation Insulation is non-conductive material used to prevent leakage of electric current from a conductor. There are several classes of insulation in use for generator construction, each recognized for a maximum continuous-duty temperature. 絕緣 絕緣體就是非導(dǎo)電材料，用來防止導(dǎo)體中電流的泄露。按最高持續(xù)耐熱度劃分，發(fā)電設(shè)備中使用的絕緣體有多種等級(jí)。LLagging Power Factor Lagging power factor in AC circuits (a power factor of less than 1.0) is caused by inductive loads, such as motors and transformers, which cause the current to lag behind the voltage. See Power Factor. 滯后功率因數(shù) 交流電路中的滯后功率因數(shù)（小于1.0）是由感應(yīng)負(fù)荷引起的，例如發(fā)動(dòng)機(jī)、變壓器，使電流滯后于電壓。（參照功率因數(shù)） Leading Power Factor Leading power factor in AC circuits (0.0 to -1.0) is caused by capacitive loads or overexcited synchronous motors which cause the current to lead the voltage. See Power Factor. 超前功率因數(shù) 交流電路中的超前功率因數(shù)(0.0 to -1.0)是由電容負(fù)荷或者過勵(lì)的同步電動(dòng)機(jī)引起的，使電流超前于電壓。（參照功率因數(shù)） Line-To-Line Voltage Line-to-line voltage is the voltage between any two phases of an AC generator. 線電壓 線電壓是指交流發(fā)電機(jī)任何兩相間的電壓。 Line-To-Neutral Voltage In a 3-phase, 4-wire, Y-connected generator, line-to-neutral voltage is the voltage between a phase and the common neutral where the three phases are tied together. 相電壓 在三相四線星形連接的發(fā)電機(jī)中，相電壓是指三相連接點(diǎn)與每相之間的電壓。 Load Demand負(fù)載需求 Load Demand is a paralleling system operating mode in which the system monitors the total kW output of the generator sets, and controls the number of operating sets as a function of the total load on the system. The purpose of load demand controls is to reduce fuel consumption and limit problems caused by light load operation of reciprocating diesel generator sets. 負(fù)載需求是并聯(lián)系統(tǒng)的一種運(yùn)行模式，系統(tǒng)監(jiān)控發(fā)電機(jī)組總的輸出功率，根據(jù)系統(tǒng)總負(fù)載量決定運(yùn)行機(jī)組的數(shù)量。負(fù)載需求控制的目的是降低燃料的消耗量，減少往復(fù)式柴油發(fā)電機(jī)組因低負(fù)荷造成的故障。 Load Factor The load factor is the ratio of the average load to the generator set power rating. 負(fù)荷系數(shù) 負(fù)荷系數(shù)指的是機(jī)組的平均負(fù)荷與額定功率之間的比率。 Load Shedding Load shedding is the process by which the total load on a paralleling system is reduced, on overload of the system bus, so that the most critical loads continue to be provided with reliable electrical service. 卸載 在超載的系統(tǒng)母排上，并聯(lián)系統(tǒng)的總負(fù)載被降低的過程稱為卸載，以確保最關(guān)鍵負(fù)載獲得可靠的電力供應(yīng)。 Local-Area Network (LAN) A computer network that spans a relatively small area. Most LANs are confined to a single building or group of buildings. 局域網(wǎng) 局域網(wǎng)（LAN）是指覆蓋相對(duì)較小區(qū)域的計(jì)算機(jī)網(wǎng)絡(luò)，大多數(shù)局域網(wǎng)局限在單一的建筑或建筑群內(nèi)。 Low Voltage AC system operating voltages from 120 to 600 VAC. 低壓 交流電系統(tǒng)中從120到600 VAC的電壓稱為低壓。MMain Breaker A main breaker is a circuit breaker at the input or output of the bus, through which all of the bus power must flow. The generator main breaker is the device, usually mounted on the ge