Distance Relay Logic Programming
GARD 8000 Distance Relay
RFL Electronics Inc.
In the Output example, the Trip signal is connected to Digital Output 1 which then will be mapped to a
physical output via the System Logic.
CABLEM
– Performs the same function as CABLE but one Digital Input can be connected to up to 16
Logic Inputs. Or, one Logic Output can be connected to 16 Digital Outputs. The inputs example above
shows how CABLEM has been applied to a “breaker open” input where one Digital Input asserts 4
Logic Inputs.
OR/AND
– Performs this operation on up to 16 signals. For example, for the outputs above, all 50P
elements have been combined (ORed) to one Digital Output.
XOR
– Performs this operation on two signals.
FFRS
– Provides a flip flop (SET, RESET) for two signals.
There are other operands available in zivercom but these are not directly applicable for GARD. They
perform advanced programming like timers, counters, combining of analog signals, etc. While possible
to use for the GARD distance relay module, these operations are preferably programmed in the system
logic.
March 1, 2009
11-12
973.334.3100
