ABB REC 561, User Manual, Page: 521 / 643

ABB Network Partner AB
Service report
Version 1.0-00
1MRK 580 137-XEN
Page 7 - 2
Line-protection terminals, which have built-in line differential protection
functions, separately display (for each phase) the values of the differential
and bias currents in phases L1, L2, and L3.
2.3 Phasors
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Phasors
Primary (Secondary)
The appearance of phasors of analogue input quantities as they enter the
terminal from the current and voltage instrument transformers, depends
on the type of terminal and on the built-in options.
The line protection terminals displays primary and secondary phasors of
measured currents and voltages only if they have an optional fault loca-
tion function builtin.
Other terminals in the REx 5xx-series have this function builtin as an
option, which also depends on the number of built-in current and voltage
inputs and their role within the terminals.
2.4 Synchronising values
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Sync Values1 (2,3,4)
A control terminal with a built-in synchro-check option displays the
actual measured values of phase angle difference (DiffPhase), voltage dif-
ference (DiffVoltage), and frequency difference (DiffFreq).
2.5 Logical signals
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Logical Signals
The current values of all internal logical signals, except those related to
the apparatus control and interlocking functional blocks, are always avail-
able under the above submenu.
2.6 Different I/O units
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Slotxx (xx=12,14,....,36)
Different REx 5xx terminals can comprise different I/O units, which serve
like an interface between the terminal and external elements of the power
system, such as circuit breakers, isolators, and measuring converters.