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4 Protection Functions
D01908R02.12 B-PRO User Manual 8700 4-21
Recording Functions
The relay has recording and logging functions to aid with the analysis of faults,
and the overall performance of your protection scheme.
Fault Recording The relay provides DFR-quality fault recording, capturing input signal wave-
forms and external input states at a rate of 96 samples per cycle. Each record
also contains the timing of the internal logic produced by the relay (e.g. Device
87B-1 trip). Obtain this information by uploading the records from the relay
via the terminal mode file transfer process and view them with RecordBase
View software.
The quantities recorded are:
• 21 analog channels (3 voltages and 18 currents, in secondary volts and am-
peres respectively) @ 96 samples/cycle
• 9 operational currents and 9 restraint currents @ 8 samples/cycle (87B-1,
87B-2, 87T IO+IR)
• 9 external inputs @ 96 samples/cycle
• relay internal logic signals @ 8 samples/cycle, including virtual inputs
• 15 ProLogic signals @ 8 samples/cycle.
Parameters that are user-selectable with respect to recording faults:
• Record length (0.2–2.0 seconds => 12 – 120 cycles @ 60 Hz Base) with
automatic extension to capture successive triggers
• Recorder triggering by any internal logic or external input signal
Swing Recording The B-PRO records dynamic system responses allowing you to analyze system
stability and to provide a larger context for fault analysis. Swing records con-
tain positive sequence phasor measurements and system frequency calculated
at a rate of 1 phasor per cycle. Swing records can extend to 3 minutes in dura-
tion.
The quantities recorded are:
• Positive sequence impedance (magnitude)
• Positive sequence voltage (magnitude)
• Positive sequence current (magnitude)
• 3-Phase Vars (reactive power)
• 3-Phase Watts (real power)
• Positive sequence frequency
Record Initiation Recording can be initiated automatically by the relay when a fault or abnormal
condition is detected. You can set the relay to initiate a fault record on activa-
tion of any of its trip or alarm functions or on assertion of any external inputs.
The assignment of fault record initiation to the various relay functions is done
through the relay’s Output Matrix settings.
A recording can also be initiated manually through the terminal user interface.
The commands
Fault Recording and Swing Recording are available under the
Records menu.
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