ABB Relion 670 Series Technical Reference Manual page 641

1MRK505222-UUS C
Technical reference manual
After the initiate has been accepted, it is latched in and an internal signal "Started" is
set. It can be interrupted by certain events, like an inhibit signal.
To initiate auto-reclosing by CB position Open instead of from protection trip signals,
one has to configure the CB Open position signal to inputs 52a and RI and set a
parameter StartByCBOpen = Enabled and CBAuxContType = NormClosed (normally
closed, 52b). One also has to configure and connect signals from manual trip
commands to input INHIBIT.
The logic for switching the auto-recloser Enabled/Disabled and the starting of the
reclosing is shown in figure 315. The following should be considered:
• Setting Operation can be set to Disabled, External ctrl or Enabled. External ctrl
offers the possibility of switching by external switches to inputs ON and OFF,
communication commands to the same inputs, and so on.
• SMBRREC (79) is normally started by tripping. It is either a Zone 1 and
Communication aided trip or a general trip. If the general trip is used the function
must be blocked from all back-up tripping connected to INHIBIT. In both
alternatives the breaker failure function must be connected to inhibit the function.
RI makes a first attempt with synchronism-check, RI_HS makes its first attempt
without synchronism-check. TRSOTF starts shots 2-5.
• Circuit breaker checks that the breaker was closed for a certain length of time
before the starting occurred and that the CB has sufficient stored energy to
perform an auto-reclosing sequence and is connected to inputs 52a and CBREADY.
Section 12
Control
635