Configuration
GARD 8000 Distance Relay
RFL Electronics Inc.
To fully understand what the inputs and outputs are doing in the system logic, the actual System Logic
Diagram should be consulted. This is supplied at the rear of the GARD 8000 manual and is also
available for download or viewing from the GARD file operations menu.
For example, the distance relay inputs are shown as follows
Input Mapping
VT_fuse_fail
Ext_Reclose_Init
IN_52B_A
Manual_Close
EXT_OSC_IN
EXT_SYNC_CHECK
VTFUSEFAIL
EXTRECLOSEINIT
52_PHASE_A
MANUALCLOSE
EXTOSCIN
EXTSYNCCHECK
Distance Relay in Slot S3
Logic Start Bit 272
A_TRIP
B_TRIP
C_TRIP
3_PH_TRIP
TB2-13
TB2-14
TB2-15
TB2-16
TB2-17
TB2-18
TB2-19
TB2-20
TB2-21
TB2-22
TB2-23
TB2-24
Input 1
Input 2
Input 3
Input 4
Input 5
Input 6
6 Input
Slot 2 Left
MODULE3
Input 1
Input 2
Input 3
Input 4
Input 5
Input 6
1
2
3
1
2
3
1
2
3
IN_52B_B
IN_52B_C
U8
U9
U11
52_PHASE_B
52_PHASE_C
2
3
1
4
PILOT_TRIP
A_RETRIP
B_RETRIP
C_RETRIP
3_PH_RETRIP
BFR_PICKUP
BFR_TRIP
AG
BG
CG
AB
BC
CA
ABG
BCG
CAG
3_PHASE
XOR2
XOR2
XOR2
OR3
HMIIN1
HMIIN1
HMIIN2
HMIIN2
HMIIN24
HMIIN24
U12
Figure 6-7. Distance Relay Inputs, schematic diagram
The logic inside the ‘distance’ block on the schematic is fixed as delivered from the factory but can be
custom ordered for your application. While the proven logic in the distance relay is not changed, the
input and output signals of the distance block can be customized to provide different functionality for
different applications. A complete list of available signals is provided at the end of this section.
The physical inputs (in this example Inputs 1 – 12) are mapped on the webpage to logic inputs. Any
physical input can be freely assigned to any number of logical inputs. For example, the default distance
relay configuration uses 52b inputs per phase. One external combined 52b input can be mapped to all
three logical inputs. On the other hand, if a breaker with single pole operating mechanism is used, the
three physical inputs can be wired individually to GARD 8000 inputs to provide pole discrepancy
protection.
March 1, 2009
6-6
973.334.3100
