MRR1A RotorEarth Fault Relayt 19" Rack
The generator rotor protection relay MRR1 com-bines rotor earth fault protection, excitation overand undercurrent protection as well as rotating diode failure protection. Thus providing a powerful protection regarding the rotor of synchronous generators, covering the following ANSI codes:
37 DC undercurrent relay
40 Field relay
58 Rectification failure relay
64 Ground detector relay
76 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 supervises the DC excitation current of brushless excitor machines.
The protective functions are: Undercurrent, overcurrent and ripple detection for diode failure protection.
- ANSI Schutz
Interested in product
Tell us your interest in this product and we will contact you for more details.