RFL 9300 Digital
Current Differential Relay
Line Differential Relay Protection over audio, digital, or fiber optic channels
Suitable for three pole and single pole tripping applications
Provides high-speed protection for two or three terminal AC transmission lines
Three-phase and ground fault detection
Typical operating times (Audio: 1.5-2.5 cycles, Digital and Fiber-Optic: 0.5-1.5 cycles)
Optional back-up communications
ANSI C37.94 fiber interface for relay and stand alone Fiber Service Unit (FSU)
Remote programming and interrogation
Meets ANSI C37.90, C37.90.1 (SWC) and C37.90.2 (RFI) and IEC specifications
Three phase and ground oscillography files for five events
Channel addressing
Sequence-of-events recording
Interchangeable communications for audio, digital, and direct fiber versions
Continuous channel delay monitoring and compensation
Selectable backup protection on loss of communications
Available DNP-3.0 and MODBUS communications interfaces
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