Disturbance Recorder; Remote Serial Communication - Spa; Breaker-Failure Protection - ABB REC 561 User Manual

1MRK 580 146-XEN
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4.8 Breaker-failure
protection
4.9 Loss-of-power system
voltage

4.10Disturbance recorder

4.11 Remote serial
communication - SPA
Introduction - REC 561
The breaker-failure protection in the REC 561 operates on the basis of the
phase currents that flow through a corresponding line circuit breaker. This
optional function is intended to be used only for a single-breaker bay.
Two timers are available, one independent of the other: timer T1 for a
repeated tripping of its own circuit breaker and timer T2, which operates
the corresponding output relays connected into the breaker-failure trip-
ping logic that is built up for the whole substation.
External tripping functions start the operation of the breaker-failure pro-
tection and are connected to corresponding binary inputs for this purpose.
This function provides a delayed three-phase trip in case of loss-of-power
system voltage in all three phases. The trip and alarm are issued when all
three voltage phases have been low for more than seven seconds. It can be
used as a preparative step for power-system restoration.
The disturbance recording function is an important part of a substation
monitoring system, which enables the evaluation of different events
within the power system.
The optional disturbance recorder, with high performance, is one of the
building blocks within REC 561. It can memorize up to 10 analogue and
48 binary signals (input binary signals or internal signals) that are availa-
ble within the terminal. At maximum configuration the recording time is
10 seconds.
All the recorded analogue and binary signals are programmable to start a
recording. Analogue signals are also programmable for overfunctions and
underfunctions, and binary signals can start recording with a transition
from a logical 0 to a logical 1 and vice versa.
The time base is synchronized with an internal clock and via the synchro-
nizing facilities further on to the system. Pre-fault time, post-fault time,
and limit time can be set in wide ranges.
Disturbance records can be collected locally by means of a PC that is used
for local man-machine communication, as well as remotely within the
SMS and the Substation Automation system. REVAL, the disturbance
evaluating PC-based program that operates in MS Windows, is also avail-
able.
Optionally, one SPA communication port is available with REC 561´s cor-
responding software. This is installed on the rear side of the terminal.
Remote communication with REC 561 uses optical fibres to eliminate influ-
ence of electromagnetic interferences. This enables REC 561 to be a part of
an independent Station Monitoring System (SMS). This means that the
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