Current Differential Relay
GARD 8000 SYS RFL Electronics
June 20, 2014 13-39 973.334.3100
Local and Remote Trips
Phase A, B, C, and Ground Active Trip
When red this indicates that the corresponding phase has an active trip. Green indicates the absence of
an active trip.
Fault Detectors
Phase A, B, C, Ground, and Remote Fault Detectors
When red this indicates that the corresponding phase has an active fault detector. Green indicates the
absence of active fault detectors.
Current Differential Alarms
Current Diff Alarm Phase A, B, C, and Ground
When red this indicates that the corresponding phase has an active current differential alarm (see
section 13.5.1.2.11). Green indicates the absence of a current differential alarm.
Phase Loss Alarms
Phase Loss Alarms Phase A, B, and C
Red indicates that the relay has calculated a loss of current in the corresponding phase per the open
conductor or loss of load algorithms. Note that if the open conductor or loss of load algorithm is
configured by the user to cause a trip the condition will be transient and would not be expected to be
seen on the web page. Green indicates the algorithms have not calculated a phase loss condition.
Local and Remote Phase Sequence (deg)
Phase A, B, C, and Ground
The system provides an indication of the relative phasing of the phase currents. The phasing is
reported relative to the phase A current (no voltages are applied to the relay, only currents). The data
is only valid when the system is in steady-state and there are currents applied to the relay.
The local currents will be displayed as 0º, 120º, 240º or “Error” (not available). The remote currents
will be displayed as 180º, 300º, 60º or “Error”.
13.4.3 COMMUNICATIONS STATUS
The Communications Status web page is shown below.
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