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ID:41590814
大小:56.78 KB
页数:7页
时间:2019-08-28
《S-Z英语词汇发电机组专业术语》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、SCRSiliconControlledRectifier・・athree-electrodesolid-statedevicewhichpermitscurrenttoflowinonedirectiononly,anddoesthisonlywhenasuitablepotentialisappliedtothethirdelectrode,calledthegate.可控硅整流器——三电极固态元件,只有当匹配的电压作用于第三电极(选通电极)时,才能够保证电流朝一个方向流动。ShortCircuitAshortcircuitisgenerallyanunintendedel
2、ectricalconnectionbetweencuiTentcarryingparts.短路,通常是指带电流的组件之间意外的电路连接。ShuntTripShunttripisafeatureaddedtoacircuitbreakerorfusibleswitchtopermittheremoteopeningofthebreakerorswitchbyanelectricalsignal・分励脱扣,是线路断路器或可熔电闸的一个特性,可通过远程信号来进行分断或转换。SoftLoadingSoftloadingreferstotherampingofloadontooroff
3、ofageneratorinagradualfashionforthepuiposeofminimizingvoltageandfrequencytransientsonthesystem.软加载,是指在给发电机组增加或减少负载时要逐渐进行,以减少电压和频率对系统的瞬变影响。SoundLevelMeterAsoundlevelmetermeasuressoundpressurelevel.Ithasseveralfrequency-weighteddecibel(dB)scales(A,B,C)tocoverdifferentportionsoftherangeofmeasur
4、edloudness・SoundlevelmetersindicateRMSsound,unlessthemeasurementsarequalifiedasinstantaneousorpeaksoundlevel.声级表,是用来测量声压级别的,它根据声音的频率分为几个分贝级(A,B,C)o声级表表征的是均方根声音,除非是适合瞬间或峰值的度量。SoundPressureLevel(SPL)Soundpressurelevelisameasurementofthepressurefluctuationsofasoundwaveasitpropagatesthroughtheai
5、r.Becauseofthewiderangeofpressurestowhichtheearresponds,alogarithmicscaleisusedandisexpressedasaratioofthemeasuredpressurereferencedtoapressureof2x10-5N/m2(20mPa)whichisthethresholdofhumanhearingat1000Hz.Themeasureisexpressedindecibels(dB).TheBelunitisnamedafterAlexanderGrahamBell.声压级别,是表示在空
6、气中传播的声波的起伏压。由于耳朵能感知的声压范围很大,所以采用其对数值,并以2x10-5N/m2(20mPa)的比率表示,这是人类在1000Hz所能听到的极限,单位是分贝(dB)o贝尔(十分贝)是以亚历山大•格雷姆•贝尔的名字命名的。StandbySystemAstandbysystemisanindependentpowersystemthatallowsoperationofafacilityintheeventofnormalpowerfailure・备用系统,是一个独立的电力供应系统,当常规电力供应失败时,备用系统就会运行。StarConnectionSeeWyeCon
7、nection.星形连接。参见Y形连接。StartingCurrentTheinitialvalueofcurrentdrawnbyamotorwhenitisstartedfromstandstill・启动电流。当发动机从停止状态启动时带来的初始电流值就是启动电流。SurgeSurgeisthesuddenriseinvoltageinasystem,usuallycausedbyloaddisconnect.突变,是指系统中电压突然升高,通常是由于负载断开而引起的。SurgeSuppre
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