GARD 8000® Single Function PLC Channel

  • GARD PLC thumb
  • GARD PLC thumb
GARD PLC

Product Description

The GARD 8000® Single Function PLC channel is a product that can be programmed as Frequency-Shift Keyed (FSK) power line carrier system or as an amplitude-modulated ON/OFF powerline carrier transmitter/receiver terminal. The unit is designed for pilot protection relaying applications, requiring high-speed reliable communications. The GARD 8000® PLC can be programmed for On/Off type directional comparison blocking (DCB), or Frequency Shift, type direct transfer trip, (DTT) Unblocking (DCU), or either single, or dual phase comparison applications.

The extensive sequence of events and diagnostic features provide information for the GARD 8000® and integrated PLC modules. The chassis is available in both a 3U version which can support one PLC system, or a 6U version which can support up to four PLC systems.

In the smaller 3U version, a PLC system and a plug-in 4-Zone distance relay module is supported eliminating the need for a conventional PLC and distance relay. The 6U version can support two PLC systems and two distance relays with full redundancy to simplify applications even further.

The unit is available with front panel direct reading (in dB) digital meter to indicate signal strength. Each unit also comes with an external carrier level indicator output for use with external measuring devices such as a panel meter or an analog RTU input.

Other GARD 8000® function modules such as an analog teleprotection module and current differential relay module can also be used in the chassis if desired. Redundant controller and power supplies are available as options.

 RFL team proudly displaying the 2007 UTC Best Telecom Product Award.

RFL won the 2007 "Best New Telecom Product" Award for the GARD 8000® at the National Utilities Telecommunications Conference (UTC) held in Austin, Texas. The judges were impressed by the product's integrated teleprotection, powerline carrier, IEC 61850 Ethernet, multiplexing, and relaying capability with the simple to use web browser user interface.

System Features

  • Remote access via Ethernet, RS485, RS232
  • Easy to program via integrated HTML Web Pages
  • Optional integrated 4-zone distance protective relay
  • Supports IEC 61850
  • User defined logic and alarms for your specific applications
  • Straight-forward web browser based user interface for settings and diagnostics; no proprietary application program required
  • Optional built-in GPS receiver provides accurate time tags
  • DNP3, Level 2 compliant
  • Full system redundancy option available
  • Additional plug-in protection modules such as audiotone teleprotection and distance relay modules can be used with the GARD 8000 Single Function PLC System
  • Supports NERC/FERC security standards

Single Function PLC Features

  • Single or dual PLC systems in one chassis available
  • One product for all ON/OFF and FSK PLC applications
  • Up to four ON/OFF or FSK can be supplied in one chassis
  • Internal CLI meter available
  • One filter
  • Built-in skewed hybrid
  • Automatic setup for commissioning
  • Integrated Reflected Power Meter
  • Full system redundancy option
  • 10W, 50W, and 100W Power Options
  • Built-in Check-back with remote initiate capabilities standard
  • Complies to latest ANSI C93.5-1997 Single Function PLC Standard
  • Complete address and Check-back testing
  • 10 Year Warranty

ON/OFF

Transmitter

  • Frequency programmable: Frequency programmable from 30 to 500 kHz in 125Hz increments, without hardware changes.
  • Output Power: Programmable for 1 watt, 3 watt, or 10 watt levels. Output power is displayed on optional front TSD and is remotely accessible. The unit is available with 50W and 100W options in external 3RU chassis.
  • Output Impedance: 50 Ohms standard. 75 Ohms available
  • Frequency Stability: +/- 10 Hz
  • External Keying Inputs: (4) Carrier Start, Stop, Reserve Signal Key, and Check Back Test Initiate. All inputs programmable active high or low to operate at the following nominal voltage levels: 24 Vdc, 48 Vdc, 125 Vdc, 250 Vdc. Active inputs are recorded in SOE files and their status displayed on the optional front TSD.

Receiver

  • Frequency programmable: Programmable from 30 to 500 kHz in 125 Hz increments, without hardware changes.
  • Receiver Level: On command, the receiver sensitivity will self adjust to the incoming signal strength. The receiver gain will then be fixed.
  • Receiver Input Impedance: Terminated mode, 50 or 75 Ohm. Unterminated mode, > 30 K-Ohm.
  • Dynamic Range: >40dB
  • Receiver Bandwidth, Channel Spacing and Channel Delay Times: Receiver bandwidth is user selectable from the following table, without hardware changes. The channel times are inclusive of GARD 8000® System.
  • Receiver Outputs: The receiver can be provided with the following standard outputs; or programmed for specific applications:
    • (4) Block received
    • (1) Transmitter Fail/Hardware Alarm
    • (1) Checkback fail alarm
    • (1) Checkback test in progress
    • Guard output status
    • Checkback initiate status
    • High percent reflected power alarm
    • Logic alarm
  • Automatic Checkback Operation: The PLC system is supplied with an internal automatic carrier checkback program. The checkback code structure, and programming is compatible with the existing RFL 9785, and previous Model 6785P.

FSK

Transmitter

  • Frequency programmable: Frequency programmable for either 2F, or 3F operation, from 30 to 500 kHz in 125 Hz increments, without hardware changes. Output frequency settings will be available on optional front mounted TSD.
  • Frequency Shift: Standard frequency shifts of +/- 100 Hz, +/- 250 Hz, and +/- 500 Hz are available. Three-frequency operations are capable of providing 250 Hz shift from the center (Guard) frequency for permissive relaying protection channels, and 100 Hz shift from the center frequency (Guard) for direct transfer trip (breaker failure) applications.
  • Output Power: User programmable for the following power output levels:
    • 1W guard/1W trip
    • 1W guard/10W trip
    • 3W guard/10W trip
    • 10W guard/10W trip
    • Optional 50W guard/50W trip available
    • Optional 100W guard/100W trip available
  • Output Impedance: 50 Ohms standard, 75 Ohms available
  • Frequency Stability: +/- 10 Hz

Receiver

  • Frequency programmable: Programmable from 30 to 500 kHz. in 125 Hz increments, without hardware changes.
  • Receiver Level: The receiver sensitivity self adjusts to the incoming signal strength. The actual signal level is available for display on the optional front mounted PDA, remotely via TCP/IP or RS-232 interface or on a local laptop. The level can be selectively displayed in either dBm, (+/- 20 dB range), or mv.
  • Receiver Sensitivity: Minimum = 5 mVrms, Maximum = >25 Vrms
  • Receiver Input Impedance: Terminated mode, 50 or 75 Ohm. Unterminated mode, > 30 K-Ohm.
  • Dynamic Range: >40dB
  • Receiver Bandwidth, Channel Spacing and Channel Delay Times: Receiver bandwidth is user selectable from the following table, without hardware changes.

Available Files

Files Available in the Customer Area

Please visit Operating Manuals or Product/Software Downloads to download relevant files. Requires RFL Customer Account.

Please visit Operating Manuals or Product/Software Downloads to download relevant files. Requires RFL Customer Account.

GARD 8000® Emulators

The RFL GARD 8000® Emulator will simulate a complete GARD Protective Relay and Communications system without the need for an actual GARD chassis. The Emulator will allow the user to pre-configure a system by selecting which RFL Modules are included in the final system, thus allowing for whole chassis configuration to be saved and loaded into an actual GARD chassis. Conversely files saved from an actual GARD chassis can be loaded into the Emulator. The Emulator will familiarize the user with the web driven capabilities of the GARD 8000® System and can be used as a teaching tool in the field. The GARD Emulator will show typical examples of GARD status situations. Note that because this is an emulator there are slight differences in menu options from an actual GARD chassis, also note that when the ‘Save’ button is clicked in configuration mode all configurations are accepted.

The Emulator Software is conveniently loaded into the users PC. The software, when loaded, also includes a user manual which will step you through using the Emulators. Examples of how the Emulator can interact with a GARD chassis are also described.

Please note that there are specific Emulators for the Image software that is loaded into the GARD 8000®, please download the correct version for your machine. Different versions do not work with different images.

If you should have any questions please call our Customer Service department at 973-334-3100 x226 and they will be glad to provide assistance.

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