ABB REC 561 - Single-Phase Front Logic

ABB Network Partner AB
Tripping logic
Version 1.0-00
1MRK 580 120-XEN
Page 5 - 2
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.
Fig. 1 Three-phase front logic—simplified logic diagram
2.2 Single-phase front
logic
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:
1
V
TRIP-EXTL1
TRIP-EXTL2
TRIP-EXTL3
1
V
TRIP-TRSPZ
TRIP-TRTP
1
V
1
V
1
V
L1TRIP
L2TRIP
L3TRIP
To
Fig. 3
(X80120-1)