MRR1 |DS200TCPDG1BEC|轉(zhuǎn)子接地故障保護(hù)|
簡介及應(yīng)用
發(fā)電機(jī)轉(zhuǎn)子保護(hù)繼電器MRR1集轉(zhuǎn)子接地故障保護(hù)、勵(lì)磁過保護(hù)于一體
和欠流保護(hù)以及旋轉(zhuǎn)二極管失效保護(hù)。
從而為同步發(fā)電機(jī)轉(zhuǎn)子提供了強(qiáng)有力的保護(hù)，覆蓋了
直流欠流繼電器
領(lǐng)域的繼電器
整流故障繼電器
接地探測器繼電器
直流過流繼電器
MRR1推薦用于同步發(fā)電機(jī)和額定1mva以上的電動機(jī)。
轉(zhuǎn)子接地故障元件檢測轉(zhuǎn)子繞組的高低電阻接地故障。它是
設(shè)有兩個(gè)階段，一個(gè)報(bào)警，一個(gè)跳閘。
勵(lì)磁電流保護(hù)元件對無刷勵(lì)磁機(jī)的直流勵(lì)磁電流進(jìn)行監(jiān)控
機(jī)器。保護(hù)功能有:二極管欠流、過流、紋波檢測
故障保護(hù)。
特點(diǎn)與特點(diǎn)
除了一般MR-description中描述的特性外，MRR1還提供:
檢測高阻抗接地故障，測試頻率為0.5 Hz
接地故障保護(hù)的短路和過壓檢測輸入
通過霍爾換能器電隔離勵(lì)磁電流測量，測量范圍
0 ~ 20a
絕緣電阻顯示
顯示勵(lì)磁電流
勵(lì)磁電流過流和欠流保護(hù)，具有獨(dú)立的電流設(shè)置
延遲時(shí)間
通過監(jiān)測勵(lì)磁電流的紋波分量來檢測二極管的故障
二級監(jiān)督轉(zhuǎn)子絕緣電阻與獨(dú)立設(shè)置
電阻和延時(shí)
兩個(gè)跳閘繼電器，一個(gè)用于勵(lì)磁欠流和過流，一個(gè)用于二極管故障檢測
用于阻塞和遠(yuǎn)程復(fù)位的數(shù)字輸入
可編程功能的阻塞輸入
輸出繼電器保護(hù)功能的可編程分配
通過RS485遠(yuǎn)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
