ABB Relion 670 Series Applications Manual page 300

Section 14
Control
A number of conditions need to be fulfilled for the start to be accepted and a new auto reclosing
cycle to be started. They are linked to dedicated inputs. The inputs are:
CBREADY , circuit breaker ready for a reclosing cycle, for example, charged operating gear.
•
CBCLOSED to ensure that the circuit breaker was closed when the line fault occurred and start
•
was applied.
• No signal at
been accepted, it is latched in and an internal signal "start" is set. It can be interrupted by
certain events, like an "inhibit" signal.
14.2.2.3 Initiate auto reclosing from circuit breaker open information
If a user wants to initiate auto reclosing from the circuit breaker open position instead of from
protection trip signals, the function offers such a possibility. This starting mode is selected with
the setting parameter
NO (normally open) is connected to
breaker closed to circuit breaker open an auto reclosing start pulse is generated and latched in the
function, subject to the usual checks. The auto reclosing sequence continues then as usual. Signals
from manual tripping and other functions, which shall prevent auto reclosing, need to be
connected to the
14.2.2.4 Blocking of the auto recloser
Auto reclose attempts are expected to take place only for faults on the own line. The auto recloser
must be blocked by activating the
• Tripping from delayed distance protection zones
• Tripping from back-up protection functions
• Tripping from breaker failure function
• Intertrip received from remote end circuit breaker failure function
• Busbar protection tripping
Depending of the starting principle (general trip or only instantaneous trip) adopted above the
delayed and back-up zones might not be required. Breaker failure trip local and remote must
however always be connected.
14.2.2.5 Control of the auto reclosing dead time for shot 1
Up to four different time settings can be used for the first shot, and one extension time. There are
separate settings for single-, two- and three-phase auto reclosing dead time,
If no particular input signal is applied, and an auto reclosing program with single-phase auto
reclosing is selected, the auto reclosing dead time
inputs is activated in connection with the start, the auto reclosing dead time for two-phase or
three-phase auto reclosing is used. There is also a separate time setting facility for three-phase
high-speed auto reclosing without synchrocheck,
activated by the
A time extension delay,
intended to come into use if the communication channel for permissive line protection is lost. In a
case like this there can be a significant time difference in fault clearance at the two line ends,
where a longer auto reclosing dead time can be useful. This time extension is controlled by the
Extended t1 = On and the PLCLOST input. If this functionality is used the auto recloser
setting
294
INHIBIT input that is, no blocking or inhibit signal present. After the start has
StartByCBOpen = Enabled . Typically a circuit breaker auxiliary contact of type
CBCLOSED and RI . When the signal changes from circuit
INHIBIT input.
INHIBIT input for the following conditions:
RI_HS input.
tExtended t1 , can be added to the dead time delay for the first shot. It is
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t1 1Ph will be used. If one of the TR2P or TR3P
t1 3PhHS , available for use when required. It is
1MRK 511 401-UUS F
M12391-100 v6
M12391-103 v4
M12391-113 v5
t1 1Ph, t1 2Ph, t1 3Ph .
Bay control REC670
Application manual