ABB REL650 series Technical Manual page 374

Section 11
Control
368
• CBREADY: CB ready for a reclosing cycle, for example, charged operating gear
• 52a: to ensure that the CB was closed when the line fault occurred and initiation was
applied
• No blocking or inhibit signal shall be present.
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 171. 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. 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.
1MRK 506 335-UUS A
Technical manual