常用保护和继电器的功能代号.doc

常用保护和继电器的功能代号IEEE及美国标准ANSIC37.2-1970代号保护英文2计时器(延时起动或闭合)timer12过速控制装置overspeed13同步速控制器synchronousspeed14低速控制装置lowspeed17旁路或放电开关dischargeswitch21距离保护distance21P相间距离phasedistance21N接地距离grounddistance23温度控制装置temperature24过励磁保护Volts/Hertz25检同期装置synchronismcheck27低电压继电器undervoltage30保护动作指示annunciator32功率方向元件directionalpower33位置开关switchposition37低电流或低功率保护lowcurrent/powerrelay40失磁保护loss-of-field41灭磁开关fieldcircuitbreaker43重合器reclosurecutoutswitch46逆相序保护(负序过流)I22 tNeg-SeqOvercurrent47负序电压保护Neg-Seqvoltage49热保护thermal49M电动机热保护inductionmotorthermal49T变压器热保护transformermotorthermal50电流速断保护instantaneousovercurrent50P过流保护phaseovercurrent50N零序过流保护neutralovercurrent50G漏电流保护residualovercurrent50BF失灵保护CircuitBreakerFailure51反时限过流保护timeovercurrent52交流断路器ACcircuitbreaker52CC合闸线圈circuitbreakerclosingcoil52TC跳闸线圈circuitbreakertripcoil55功率因数继电器powercoefficient57短路或接地保护shortcircuit/earthingrelay59过电压保护overvoltage60电压或电流平衡保护unbalancecurrent/voltage62延时继电器timedelay63压力开关pressureswitch64接地检测继电器groundingdetection64G发电机100%定子接地保护100%statorground67方向过流保护ACdirectionalovercurrent67N接地方向过流grounddirectionalovercurrent67P方向过流phasedirectionalovercurrent67Q负序方向过流Neg-SeqDir.Overcurrent68闭锁blocking振荡闭锁powerswingblocking70可变电阻rheostat72直流断路器DCcircuitbreaker74告警alarm76直流过流DCovercurrent78失步保护losssynchronous79重合闸reclosing81频率保护frequency82直流重合闸继电器DC reclosing85载波信号或导引线信号carrierorpilotwirereceiverrelay86保护闭锁lockout87差动保护differential87G发电机差动保护generatordifferential87T变压器差动保护transformerdifferential87B母线差动保护busbardifferential87V电压差动voltagedifferential89隔离刀闸lineswitch91方向性电压继电器Directionalvoltagerelay92电压和功率方向继电器Directionalvoltag