Distance Protection Module - GARD 8000® System
The Distance Protection Module in the GARD 8000® System is a full-featured Line Distance Relay with all protection functions required for a complete line protection terminal. It can be used as a stand-alone Main protection, to provide channel independent back-up for the current differential protection, or operate in parallel with the Current Differential Module, providing an independent, different, measuring principle.
The Distance Protection Module has four measuring zones, where all zones can be set Forward or Reverse. A Reverse Zone 4 is used in pilot schemes and/or as a backup zone for bus faults behind the relay.
The Distance Protection Module can operate as a channel independent stepped distance relay or applied in a pilot scheme, selectable to permissive, unblocking or blocking. Weak infeed and transient block logic is included. The Distance Relay Module may use any communications interface in the GARD 8000® System. The channel interface can be dedicated to the Distance Relay or be shared with a Teleprotection System and/or a integrated Current Differential Protection Module.
- Distance (mho / quadrilateral for all 4 zones)
- Overcurrent supervision
- Overcurrent elements (instantaneous phase, ground, negative sequence)
- Overvoltage / Undervoltage
- Out-of-Step blocking
- Load Encroachment
- Loss of load
- Fault locator
- Frequency elements / load shed functions
- Sync check
- Voltage check
- Breaker failure function
- Breaker monitoring
- Dual breaker applications