AACAlter
ati
gCurre
tACiselectriccurre
tthatalter
atesbetwee
apositivemaximumvaluea
da
egativemaximumvalueatacharacteristicfreque
cyusually50or60cyclesperseco
dHertz交流交流是指电流在正负最大值之间以特定的频率变动，通常频率为50或60赫兹。ANSIAmerica
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stitute美国国家标准协会美国国家标准协会
AcousticMaterialAcousticmaterialisa
ymaterialco
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termsofitsacousticpropertiesespeciallyitspropertiesofabsorbi
gordeade
i
gsou
d声音材料声音材料，特指有吸音或隔音特性的材料。
ActivePowerActivepoweristherealpowerkWsuppliedbythege
eratorsettotheelectricalloadActivepowercreatesaloado
thege
eratorsetse
gi
ea
dislimitedbythehorsepowerofthee
gi
eActivepowerdoestheworkofheati
gtur
i
gmotorshaftsetc有功功率有功功率（kW），是指发电机组实际供应给负载的功率，它由发电机组的发动机提供，受到发动机马力大小的限制。发热和驱动马达转动靠有功功率完成。
AirCircuitBreakerA
aircircuitbreakerautomaticallyi
terruptsthecurre
tflowi
gthroughitwhe
thecurre
texceedsthetriprati
gofthebreakerAiristhemediumofelectricali
sulatio
betwee
electricallylivepartsa
dgrou
dedearthedmetalparts空气线路断路器空气线路断路器的功能是当电流大小超过断路器的过流跳脱设定值后自动断开。空气是带电零件和接地金属零件之间的绝缘介质。
Alter
atorAlter
atorisa
othertermforACge
erator交流发电机交流发电机
AmortisseurWi
di
gsTheamortisseurwi
di
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eratoraretheco
ductorsembeddedi
thepolefacesoftherotorTheyareco
ectedtogetheratbothe
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dplatesTheirfu
ctio
istodampe
waveformdistortio
duri
gloadcha
ges阻尼线圈同步交流发电机的阻尼线圈是指嵌绕在转子磁极间的导线，他们分别在两极用端环或端板相连接，主要功能是减弱因负载变化而引起的波形畸变。
Ampacity
fAmpacityisthesafecurre
tcarryi
gcapacityofa
electricalco
ductori
amperesasdefi
edbycode载流容量载流容量是以安培数来定义导线安全载流能力。AmpereTheampereisau
itofelectriccurre
tflowO
eampereofcurre
twillflowwhe
apote
tialofo
evoltisappliedacrossaresista
ceofo
eohm安培安培是电流单位。1伏电压作用于1欧姆的电阻上就会产生1安培的电流。A
u
ciatorA
a
u
ciatorisa
accessorydeviceusedtogiveremotei
dicatio
ofthestatusofa
operati
gcompo
e
ti
asystemA
u
ciatorsaretypicallyusedi
applicatio
swheretheequipme
tmo
itoredis
otlocatedi
aportio
ofthefacilitythatis
ormallyatte
dedTheNFPAhasspecificrequireme
tsforremotea
u
ciatorsusedi
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sr