ABB Relion 650 Series Technical Manual page 313

1MRK 506 326-UUS B
recloser is prepared to start the reclosing cycle and the output signal READY on the STBRREC (79)
function block is activated (high).
10.3.6.2 Initiate auto-reclosing and conditions for initiation of a reclosing cycle
The usual way in which to start a reclosing cycle, or sequence, is to start it when a line protection
tripping has occurred, by applying a signal to the PICKUP input.
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
158. The following should be considered:
• Setting
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.
Line distance protection REL650
Technical manual
Operation can be set to Disabled , External ctrl or Enabled . External ctrl offers the
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Section 10
Control
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