RFL offers a complete line of protective relays for use in high voltage Transmission, Distribution, and Transformer Protection applications.

The GARD 8000 is a revolutionary Current Differential and Line Distance Protection System which is unique in that there is virtually no limit to its application capabilities. The relaying principle for this product is based on the patented, time tested, and field proven RFL 9300 Current Differential Protective Relay.

Our latest generation Distance, Transformer, and Feeder Protection and Control Relays offer the most advanced digital technology, on a common hardware platform, offering a standard chassis design, that still provides maximum flexibility and versatility. All of our latest relays offer simple user interfaces and look to the future with available IEC 61850 interfaces.

RFL 8021 Line Distance Relay

The RFL 8021 Line Distance Relay model protection and control IEDs are based on the most advanced digital technology and are designed for maximum flexibility and versatility.

They have all the necessary functions to protect, control and meter an HV/MV bay IED.

They are designed to provide selective, fast and reliable protection in overhead lines with or without series compensation, whether single-phase or three-phase trips are required.

Their programmable logic unit allows the user to freely define the operational logic of the protection and control functions to adapt them to the specific bay and system requirements.

RFL 8021 Relays are complemented by a series of easy-to-use communications and programming tools that provide a user-friendly environment in which to configure applications

RFL 8051 Feeder Protection Relay

The RFL Feeder Protection Relay integrates protection, control and metering functions for a great variety of applications.

RFL 8051 systems are designed for medium voltage lines, transformers, generators and feeders where a protection, control and measurement device is required.

These relays use the advanced digital technology based on a potent microprocessor and DSP's that incorporate directional and non-directional overcurrent protection, overvoltage, undervoltage, over/underfrequency, synchronism, power inversion, thermal image, recloser function and others

RFL 8087 Transformer Protection Relay

The RFL 8087 is based on the most advanced digital technology and is designed for maximum flexibility and versatility.

It has all the necessary functions to protect, control and meter a transformer, autotransformer or reactor.

The programmable logic unit allows the user to freely define the operational logic of the protection and control functions to adapt them to the specific system requirements.

The RFL 8087 models are complemented by a series of easy-to-use communi-cations and programming tools that provide a user-friendly environment in which to configure applications.

RFL 9300 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