The GARD Pro® Digital Teleprotection system is a versatile product with extensive digital Time Division Multiplexed (TDM) communications capabilities for use in a wide range of power system protection applications.
The system is designed for protective relaying applications, requiring high-speed reliable digital communications. The GARD Pro® can be programmed for various protection schemes including Directional Comparison Blocking (DCB), Direct Transfer Trip (DTT), Permissive Transfer Trip (PTT), or phase comparison applications.
The base system supports four 64 kbps digital teleprotection channels, each consisting of eight bi-directional functions, for a total of 32 functions. Additional channels can also be added as necessary. These channels may be assigned to one of up to eight various digital communications interfaces per system.
In addition, digital multiplexing is supported, and digital communications interfaces may be multiplexed onto a timeslot of a single interface to make efficient use of station-to-station communications circuits and networks.
The system is available in both a 3U and 6U chassis sizes. 3U chassis support up to five digital communications interfaces, while a 6U chassis supports up to eight.
The GARD Pro® standard features include both DNP3 and SNMP remote management protocols for integration with management systems.
Management protocol features include:
- Includes binary inputs, binary outputs, analog inputs and counters
- New binary input points for all logical SOE triggers
- Improved DNP performance with faster response time and sensitivity
- Connections for up to three masters; two TCP/IP and one serial RS-485
- SNMP v3 with authentication and privacy support
- Sends SNMP traps to 1-5 receivers
- SNMP "Get" access for all system configuration parameters
Web Browser Interface
The GARD Pro® System is designed with ease-of-use in mind. While high functionality and great detail is provided, the GARD Pro® User Interface makes interaction with the device highly intuitive and handling greatly simplified.
All interaction with the GARD Pro® System is made by use of a standard web browser. The web pages reside in the device: no special application software is required on the PC.
A PC is connected to the front Ethernet TCP/IP port with a standard Ethernet cable. It is fast and simple to view device status, access diagnostic and test functions, and to change settings. Emulating the operations of a standard web site, navigation is intuitive and eliminates the need to study written instructions. If needed, the instruction manual, that also resides in the device, is simply accessed by the HELP function.
For off-line preparation of settings and configuration files, a small application program "emulating" a GARD Pro® System can reside on a PC or local server. Archiving and documenting settings and configuration is made simple as these are stored in standard text files.
Touch Screen Display Interface
The GARD Pro® is available with an optional Touch Screen Display (TSD) interface that provides the ability to monitor system status and SOE and perform testing functions without connecting your PC.
The GARD Pro® TSD user interface is all new with redesigned pages keeping ease-of-use in mind. Status pages will now provide live information without the need to manually refresh.
The new GARD Pro® TSD includes digital communications loopback functionality. This provides the ability to activate communications loopbacks from the TSD, without the use of a PC, allowing the ability to perform testing and troubleshooting right from the front panel.