Single-Phase Front Logic - ABB REC 561 User Manual

1MRK 580 120-XEN
Page 5 - 2
2.2 Single-phase front
logic
Tripping logic
These signals continue to appear within the tripping logic circuits (see
Fig. 3).
Any of the functional input signals that are connected to either the selected
single-phase (TRIP-TRSPZ) or three-phase (TRIP-TRTP) selected tripping
signals within the terminal, also causes the same phase-related tripping sig-
nals.
TRIP-EXTL1
TRIP-EXTL2
TRIP-EXTL3
TRIP-TRSPZ
TRIP-TRTP
Fig. 1 Three-phase front logic—simplified logic diagram
The following input signals to the single-phase front logic influence the
single-phase tripping of the terminal (see Fig. 2):
• Phase selection signals from different protection functions that can
operate on a single-phase basis and are used in the terminal.
• Internal phase-selective tripping signals
• External phase-selective tripping signals, which should be config-
ured to the terminal binary inputs. The purpose of these signals is
also to include some external protective devices, such as main two-
line protection, breaker failure units from other bays in the substation
into the optionally built-in auto-reclosing scheme or breaker failure
protection.
For additional control of the internal signals and the single-phase tripping
scheme, there must be the internal TRIP-TRSP or TRIP-TRSPE signal.
The TRIP-TRSP signal enables tripping corresponding to phase selection
signals without any restriction while any any phase selective external trip-
ping signals prevent such tripping from the TRIP-TRSPE signal.
If any of these signals continues for more than 50 ms without the presence
of any other internal single-phase selection signals, three-phase tripping is
issued. The phase selection signals, as issued by the phase-selection logic,
correspond to:
ABB Network Partner AB
1
1
1
1
1
Version 1.0-00
L1TRIP
L2TRIP To
Fig. 3
L3TRIP
(X80120-1)