ABB RELION REB670, Applications Manual

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• 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 INHIBIT input that is, no blocking or inhibit signal present. After the
start has been accepted, it is latched in and an internal signal “start” is set. It can be
interrupted by certain events, like an “inhibit” signal.
12.2.2.3 Initiate auto reclosing from circuit breaker open information
M12391-100 v6
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
StartByCBOpen = Enabled . Typically a circuit
breaker auxiliary contact of type NO (normally open) is connected to CBCLOSED and
RI . When the signal changes from 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
INHIBIT input.
12.2.2.4 Blocking of the auto recloser
M12391-103 v4
Auto reclose attempts are expected to take place only for faults on the own line. The
auto recloser must be blocked by activating the
INHIBIT input for the following
conditions:
• 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.
12.2.2.5 Control of the auto reclosing dead time for shot 1
M12391-113 v5
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 1Ph, t1 2Ph, 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 t1
1Ph will be used. If one of the TR2P or TR3P inputs is activated in connection with the
1MRK 505 370-UUS A
Section 12
Control
Busbar protection REB670 2.2 ANSI 319
Application manual