ABB Relion 670 Series Applications Manual page 337

1MRK 511 401-UEN Rev. K
In cases where one wants to differentiate three-phase auto reclosing dead time, for different
power system configuration or at tripping by different protection stages, one can also use the
STARTHS input (start high-speed reclosing). When initiating STARTHS , the auto reclosing dead
time for three-phase shot 1,
synchrocheck condition.
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.
15.2.2.3 Start 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
type NO (normally open) is connected to
circuit 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
15.2.2.4 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.
15.2.2.5 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,
t1 3Ph . If no particular input signal is applied, and an auto reclosing program with single-phase
auto reclosing is selected, the auto reclosing dead time
TR3P inputs is activated in connection with the start, the auto reclosing dead time for two-
or
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,
required. It is activated by the
A time extension delay,
is 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 setting
Bay control REC670
Application manual
t1 3PhHS is used and the closing is done without checking the
INHIBIT input that is, no blocking or inhibit signal present. After the start has
StartByCBOpen = On . Typically a circuit breaker auxiliary contact of
STARTHS input.
tExtended t1 , can be added to the dead time delay for the first shot. It
Extended t1 = On and the PLCLOST input. If this functionality is used
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CBCLOSED and START . When the signal changes from
INHIBIT input.
INHIBIT input for the following conditions:
t1 1Ph will be used. If one of the TR2P
t1 1Ph, t1 2Ph,
t1 3PhHS , available for use when
Section 15
Control
M12391-100 v6
M12391-103 v4
M12391-113 v5
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