Current Differential Relay
GARD 8000 SYS RFL Electronics
June 20, 2014 13-27 973.334.3100
Stub Bus Functions Enable
This enables or disables all of the stub bus features of the relay (see section 13.5.1.6.5). Note that the
“Backup Functions Enable” setting has no effect on the stub bus function which technically is not a
backup function.
Stub Bus Overcurrent Enable
This is used to enable or disable the stub bus overcurrent function in the relay (see section 13.5.1.6.5).
Stub Bus Overcurrent Delay (0-1000 inc 10)
This sets the timer for the stub bus overcurrent algorithm for both the three phases and ground. The
setting must be between 0ms and 1s (inclusive) in increments of 10ms.
For further information see section 13.5.1.6.5.
Stub Bus Phase Overcurrent (6-31.875 inc 0.125)
This sets the threshold for the overcurrent backup algorithm for phase A, B, and C. The setting must
be between 6A
RMS
and 31.875A
RMS
(inclusive) in increments of 0.125A
RMS
.
For further information see section 13.5.1.6.5.
Stub Bus Ground Overcurrent (0.125-31 inc 0.125)
This sets the threshold for the overcurrent backup algorithm for ground. The setting must be between
0.125A
RMS
and 31A
RMS
(inclusive) in increments of 0.125A
RMS
.
For further information see section 13.5.1.6.5.
Stub Bus Time Overcurrent
This is used to enable or disable the stub bus TOC functions in the relay. When enabled they use the
same TOC configuration settings as the backup TOC routines (see section 13.5.1.6.2).
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