ABB REL650 series Technical Manual page 386

Section 11
Control
380
For a new auto-reclosing cycle to be started, a number of conditions need to be met. They
are linked to dedicated inputs. The inputs are:
• 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 "pickup" is set.
It can be interrupted by certain events, like an inhibit signal.
To initiate auto-reclosing by CB open position instead of from protection trip signals, one
has to configure the CB open position signal to inputs 52a and PICKUP and set a
parameter StartByCBOpen = ON and CBAuxContType = NormClosed (normally closed,
52b). One also has to configure and connect signals from manual trip commands and back-
up protection fuctions that should not start autoreclosing to input INHIBIT.
The logic to enable or disable STBRREC (79) and the starting of the reclosing is shown
in figure 178. 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.
• STBRREC (79) is normally started by tripping. It is either a Zone 1 and carrier 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. PICKUP 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