ABB Relion 611 Series, Technical Manual

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shot pointer value increases. This is carried out until a successful reclosing or lockout
takes place after a complete shot sequence containing a total of five shots.
A070872 V1 EN
Figure 201: Shot pointer function
Every time the shot pointer increases, the reclaim time starts. When the reclaim time
ends, the shot pointer sets to its initial value, unless no new shot is initiated. The shot
pointer increases when the reclose time elapses or at the falling edge of the
INC_SHOTP
signal.
When
SHOT_PTR
has the value six, the AR function is in a so called pre-lockout state.
If a new initiation occurs during the pre-lockout state, the AR function goes to lockout.
Therefore, a new sequence initiation during the pre-lockout state is not possible.
The AR function goes to the pre-lockout state in the following cases:
• During SOTF
• When the AR function is active, it stays in a pre-lockout state for the time defined
by the reclaim time
• When all five shots have been executed
• When the frequent operation counter limit is reached. A new sequence initiation
forces the AR function to lockout.
8.2.4.4 Reclose controller
The reclose controller calculates the reclose, discrimination and reclaim times. The
reclose time is started when the
INPRO
signal is activated, that is, when the sequence
starts and the activated CBB defines the reclose time.
When the reclose time has elapsed, the
CLOSE_CB
output is not activated until the
following conditions are fulfilled:
1MRS757454 D
Section 8
Control functions
611 series 415
Technical Manual