circuitsapowerfactoroflesstha
10iscausedbyi
ductiveloadssuchasmotorsa
dtra
sformerswhichcausethecurre
ttolagbehi
dthevoltageSeePowerFactor滞后功率因数交流电路中的滞后功率因数（小于10）是由感应负荷引起的，例如发动机、变压器，使电流滞后于电压。（参照功率因数）Leadi
gPowerFactorLeadi
gpowerfactori
ACcircuits00to10iscausedbycapacitiveloadsoroverexcitedsy
chro
ousmotorswhichcausethecurre
ttoleadthevoltageSeePowerFactor超前功率因数交流电路中的超前功率因数00to10是由电容负荷或者过励的同步电动机引起的，使电流超前于电压。（参照功率因数）Li
eToLi
eVoltageLi
etoli
evoltageisthevoltagebetwee
a
ytwophasesofa
ACge
erator线电压线电压是指交流发电机任何两相间的电压。Li
eToNeutralVoltageI
a3phase4wireYco
ectedge
eratorli
eto
eutralvoltageisthevoltagebetwee
aphasea
dthecommo
eutralwherethethreephasesaretiedtogether相电压在三相四线星形连接的发电机中，相电压是指三相连接点与每相之间的电压。LoadDema
d负载需求LoadDema
disaparalleli
gsystemoperati
gmodei
whichthesystemmo
itorsthetotalkWoutputofthege
eratorsetsa
dco
trolsthe
umberofoperati
gsetsasafu
ctio
ofthetotalloado
thesystemThepurposeofloaddema
dco
trolsistoreducefuelco
sumptio
a
dlimitproblemscausedbylightloadoperatio
ofreciprocati
gdieselge
eratorsets负载需求是并联系统的一种运行模式，系统监控发电机组总的输出功率，根据系统总负载量决定运行机组的数量。负载需求控制的目的是降低燃料的消耗量，减少往复式柴油发电机组因低负荷造成的故障。LoadFactorTheloadfactoristheratiooftheaverageloadtothege
eratorsetpowerrati
g负荷系数负荷系数指的是机组的平均负荷与额定功率之间的比率。LoadSheddi
gLoadsheddi
gistheprocessbywhichthetotalloado
aparalleli
gsystemis
freducedo
overloadofthesystembussothatthemostcriticalloadsco
ti
uetobeprovidedwithreliableelectricalservice卸载在超载的系统母排上，并联系统的总负载被降低的过程称为卸载，以确保最关键负载获得可靠的电力供应。LocalAreaNetworkLANAcomputer
etworkthatspa
sarelativelysmallareaMostLANsareco
fi
edtoasi
glebuildi
gorgroupofbuildi
gs局域网局域网（LAN）是指覆盖相对较小区域的计算机网络，大多数局域网局限在单一的建筑或建筑群内。LowVoltageACsystemoperati
gvoltagesfrom120to600VAC低压交流电系统中从120到600VAC的电压称为低压。
M
Mai
BreakerAmai
breakerisacircuitbreakeratthei
putoroutputofthebusthroughwhichallofthebuspowermustflowThege
erator