MRR1 |DS200TCPDG1BEC|转子接地故障保护|

简介及应用

发电机转子保护继电器MRR1集转子接地故障保护、励磁过保护于一体

和欠流保护以及旋转二极管失效保护。

从而为同步发电机转子提供了强有力的保护，覆盖了

直流欠流继电器

领域的继电器

整流故障继电器

接地探测器继电器

直流过流继电器

MRR1推荐用于同步发电机和额定1mva以上的电动机。

转子接地故障元件检测转子绕组的高低电阻接地故障。它是

设有两个阶段，一个报警，一个跳闸。

励磁电流保护元件对无刷励磁机的直流励磁电流进行监控

机器。保护功能有:二极管欠流、过流、纹波检测

故障保护。

特点与特点

除了一般MR-description中描述的特性外，MRR1还提供:

检测高阻抗接地故障，测试频率为0.5 Hz

接地故障保护的短路和过压检测输入

通过霍尔换能器电隔离励磁电流测量，测量范围

0 ~ 20a

绝缘电阻显示

显示励磁电流

励磁电流过流和欠流保护，具有独立的电流设置

延迟时间

通过监测励磁电流的纹波分量来检测二极管的故障

二级监督转子绝缘电阻与独立设置

电阻和延时

两个跳闸继电器，一个用于励磁欠流和过流，一个用于二极管故障检测

用于阻塞和远程复位的数字输入

可编程功能的阻塞输入

输出继电器保护功能的可编程分配

通过RS485远程接口

 Introduction and application 

The generator rotor protection relay MRR1 com-bines rotor earth fault protection, excitation over- 

and undercurrent protection as well as rotating diode failure protection. 

Thus providing a powerful protection regarding the rotor of synchronous generators, covering the 

DC undercurrent relay 

Field relay 

Rectification failure relay 

Ground detector relay 

DC over current relay 

The MRR1 is recommended for synchronous generators and motors above 1 MVA rating. 

The rotor earth fault element detects high- and low resistance earth faults of the rotor winding. It is 

equipped with two stages, one for alarm, one for trip. 

The excitation current protection element super-vises the DC excitation current of brushless excitor 

machines. The protective functions are: Undercurrent, over current and ripple detection for diode 

failure protection. 

Features and characteristics 

Besides features described in the general MR-description, MRR1 provides: 

Detection of high impedance earth faults with a test frequency of 0.5 Hz 

Short circuit and overvoltage proof measuring input for the earth fault protection 

Excitor current measurement galvanically isolated via Hall-transducer, measuring range  

0 to 20 A 

Display of insulation resistance 

Display of the excitation current 

Excitation current over- and undercurrent protection with independent settings for current 

and delay time 

Detection of diode failures by supervision of the ripple component of the excitation current 

Two stage supervision of the rotor insulation resistance with independent settings for  

resistance and time delay 

Two trip relays, one for excitation under- and over current, one for diode failure detection 

Digital inputs for blocking and for remote reset 

Programmable function of the blocking input 

Programmable assignment of protective functions to output relays 

Remote interfacing via RS485