继电保护代号(全)

1、device codes12aunit overspeed机组过速20fire in unit21impedance (distance) protection距离保护21/2n光纤纵联距离保护21g机组最小阻抗保护24over-excitation (volts per hertz)过励磁保护（电压/频率继电器）25synch check同步检查继电器（同期检测）25/79低/过电压保护26-w变压器绕组油温保护26-o变压器油温保护27bus undervoltage母线低电压27/59under/overvoltage relay低电压/过电压保护286atransformer trip

2、 circuit 1变压器跳闸回路1286btransformer trip circuit 2变压器跳闸回路230alarm/annunciator报警/报警器32逆功率保护32fforward power正向功率32rreverse power反向功率33control ac/dc power supplies fail控制回路电源消失38发电机轴电流保护38t1unit bearing temperature high trip轴承温度高跳闸38t2bearing oil overtemperature 轴承油温过高38t3bearing sump oil overtemperature

3、轴承油箱温度高38v1nde bearing horizontal vibration high上导轴承水平振动高38v2nde bearing vertical vibration high上导轴承垂直振动高38v3de bearing horizontal vibration high下导轴承水平振动高38v4de bearing vertical vibration high下导轴承垂直振动高40under excitation失磁保护46negative sequence overcurrent负序过流48excessive starting time启动超时486abus zone

4、protection 1母线保护1486bbus zone protection 2母线保护249thermal overload过负荷49e励磁变过负荷49t1stator overtemperature 定子绕组过温49t2stator hot air temperature high定子热空气温度高49t3stator cold air temperature high定子冷空气温度高49t4cooling water temperature high冷却水温度高49s转子过负荷50instantaneous over current瞬时过流保护50/27inadvertent ener

5、gisation低压过流保护50/51/67definite time overcurrent directional方向过流保护50/51过电流保护50/51e励磁变高压侧过电流保护50/51gnsensitive earth fault protection灵敏接地故障保护50/51ninstantaneous and inverse time earth fault瞬态和反时限接地故障保护50bfbreaker failure断路器失灵51inverse time overcurrent反时限过流保护51vinverse time overcurrent反时限过流保护586aline t

6、rip circuit 1线路跳闸回路1586bline trip circuit 2线路跳闸回路259bus overvoltage母线过电压59/27tn100% earth fault protection with 3rd harmonics100%定子接地保护59nstator earth fault定子接地保护59ns定子95%接地保护60flvt fuse failurept保险丝熔断63penstock pressure low trip变压器压力释放保护64g100% earth fault发电机100%定子接地64rrotor earth fault转子接地保护64s100

7、%接地保护65lgovernor accumulator low level trip65p1governor accumulator high pressure trip65p2governor accumulator low pressure trip67directional phase overcurrent方向过流保护67gdirectional overcurrent (earth fault)方向过流保护（接地故障）67ndirectional overcurrent (earth fault)方向过流保护（接地故障）68power swing blocking振荡闭锁71变压器

8、绕组油位保护71acooling water sump low冷却水水位低71btailwater high level trip尾水水位过高跳闸74/1、74/2断路器跳闸回路监视78发电机异步保护79auto reclose自动重合闸81over/under frequency过/低频率保护81hover frenquency过频81lunder frenquency低频85carrier relay载波继电器（远方保护设备接口）86lock-out relay闭锁继电器86aunit trip a机组a相跳闸86bunit trip b机组b相跳闸86cunit trip c机组c相跳闸

9、86ttransformer lock-out relay变压器闭锁继电器87differential差动保护87g发电机差动保护87t主变差动保护87tn主变中性点差动保护87be87lline differential relay线路差动保护87nrestricted earth fault relay限制性接地故障保护87ggenerator differential发电机差动保护87uunit differential发变组差动保护87gt发变组差动保护94auxiliary trip telay辅助跳闸继电器95ct supervisionct监视继电器96变压器重/轻瓦斯保护avr/exautomatic voltage regulator /excitation unit自动电压调节装置单元buchbuchholz 瓦斯继电器flfault locating故障定位fr故障记录fplcfea plc order tripinstrumentinstrumentation device使用设备meteringmetering unit测量单元otoil temperature油温splcstation plc order triptcprtap changer pressure relief valve分接头减压阀wtwinding