7继电保护代号(全)

DEVICE CODES（继电保护代号）
12A Unit Overspeed机组过速
14转子堵转保护
20Fire in Unit
21Impedance(Distance)Protection距离保护
21T变压器阻抗保护
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
286A Transformer Trip Circuit1变压器跳闸回路1
286B Transformer Trip Circuit2变压器跳闸回路2
30Alarm/Annunciator报警/报警器
32逆功率保护
32F Forward Power正向功率
32R Reverse Power反向功率
33Control AC/DC Power Supplies Fail控制回路电源消失
37欠电流监视
38发电机轴电流保护（通过外接
装置实现温度监视）
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负序过流保护
47相序
48Excessive Starting Time启动超时（启动时间监视）486A Bus Zone Protection1母线保护1
486B Bus Zone Protection2母线保护2
49Thermal Overload过负荷电流保护
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 Energisation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
50G/51G零序过流保护
50/51E励磁变高压侧过电流保护
50/51GN Sensitive Earth Fault Protection灵敏接地故障保护
50/51N Instantaneous And Inverse Time Earth Fault瞬态和反时限接地故障保护50BF Breaker Failure断路器失灵
50Ns灵敏过流保护
51Inverse Time Overcurrent反时限过流保护
51V复合电压闭锁过流保护
50，50N定时限过流保护（相间/接地）51，51N反时限过流保护（相间/接地）586A Line Trip Circuit1线路跳闸回路1
586B Line Trip Circuit2线路跳闸回路2
59Bus Overvoltage母线过电压
100%定子接地保护
59/27TN100%Earth Fault Protection With3RD
Harmonics
59N Stator Earth Fault零序过压
59NS定子95%接地保护
60FL VT Fuse Failure PT保险丝熔断
63Penstock Pressure Low Trip变压器压力释放保护
64，59N零序电压保护
64G100%Earth Fault发电机100%定子接地
64R Rotor Earth Fault转子接地保护
64S100%接地保护
65L Governor Accumulator Low Level Trip
65P1Governor Accumulator High Pressure Trip
65P2Governor Accumulator Low Pressure Trip
67Directional Phase Overcurrent方向过流保护
67G Directional Overcurrent(Earth Fault)方向过流保护（接地故障）67N Directional Overcurrent(Earth Fault)方向过流保护（接地故障）
67，67N方向时限过流保护（定时限/反
时限，相间/接地）
67Ns,50Ns方向/无方向灵敏接地故障检测68Power Swing Blocking振荡闭锁
71变压器绕组油位保护
71A Cooling Water Sump Low冷却水水位低
71B Tailwater 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高频/低频率保护
81H Over Frenquency过频
81L Under Frenquency低频
81R频率变化率保护
85Carrier Relay载波继电器（远方保护设备接
口）
66/86重启动抑制
86Lock-Out Relay闭锁继电器
86A Unit Trip A机组A相跳闸
86B Unit Trip B机组B相跳闸
86C Unit Trip C机组C相跳闸
86T Transformer Lock-Out Relay变压器闭锁继电器
87Differential差动保护
87N零序差动保护
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
87SB Bus-bar protection母线差动保护
87BE
87L Line Differential Relay线路差动保护
87N Restricted Earth Fault Relay限制性接地故障保护
87G Generator Differential发电机差动保护
87U Unit 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 Supervision CT监视继电器
96变压器重/轻瓦斯保护
AVR/EX Automatic Voltage Regulator/Excitation
自动电压调节装置单元
Unit
BUCH Buchholz瓦斯继电器
FL Fault locating故障定位
FR故障记录
FPLC FEA PLC Order Trip
INSTRUMENT Instrumentation Device使用设备
METERING Metering Unit测量单元
OT Oil Temperature油温
SPLC Station PLC Order Trip
TCPR Tap Changer Pressure Relief Valve分接头减压阀
WT Winding Temperature绕组温度
IED Intelligent Electronic Device智能电子设备
NDME Network Disturbance Monitoring
故障录波器
Equipment
RTU Remote Terminal Unit远动装置PLC Power Line Carrier电力线载波器。