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F650 DIGITAL BAY CONTROLLER
GEK-106310-AF
5.5 CONTROL ELEMENTS
CHAPTER 5: SETPOINTS
From READY status, a reclose initiation sets the cycle counter to 1 and a reclosing sequence is initiated which
sproduce breaker close commands, unless any abnormality is produced that makes the autoreclose go to LOCKOUT
status.
The reclosing sequence consists on the following steps:
Wait until the breaker is open, if the waiting exceeds the
Fail to Open Time
setting, the autoreclose goes to LOCKOUT
by failure of opening status (AR LCK BY FAIL OPEN).
Once the breaker is open, it waits for the time set in the
Dead Time N
setting,
N
being the number of the cycles in
progress. If during this waiting the breaker is closed or reclose initiation conditions are given, the recloser goes to
LOCKOUT status by anomaly (AR LCK BY ANOMALY).
Once the Dead Time has expired, in case the
Conditions Permission
setting is disabled, a closing command would be
produced. If the conditions permission setting is enabled, the system waits for the conditions fixed in the conditions
input (AR CONDS INPUT) configured at
Setpoint > Relay Configuration > Protection Elements
; if the waiting period for
the reclosing conditions signal activation exceeds the
Hold Time
, the autoreclose goes to Lockout status by
conditions (AR LCK BY CONDS).
The autoreclose gives a Closing command and waits for the breaker to close. If the
Fail to Close Time
setting is
exceeded, the autoreclose goes to lockout by failure to close (AR LCK BY FAIL CLOSE).
At this point, the diagram indicates that a reclosing cycle has been reached, and so the cycle counter is increased. In this
time, the period set in
Reset Time
starts to count. If during the set element reset time there is no autoreclose initiation, the
cycle counter resets to its initial value (1), and the autoreclose returns to the standby status (READY). If during the
Reset
Time
setting period, there is a new autoreclose initiation, the
Reclose In Progress
sequence starts again. If this reclose is
produced after the last configured cycle in the
Maximum Number of Shots
setting, the autorecloser goes to Lockout by
maximum number of shots (AR LCK BY SHOTS).
AR LOCKOUT
This is a safety status, scheme lockout blocks all phases of the reclosing cycle, preventing automatic reclosure.
From the out of service (AR DISABLE) and BLOCK statuses, the autoreclose stays in LOCKOUT prior to going to READY.
From the RECLOSE IN PROGRESS status, the recloser goes to LOCKOUT status if any of the anomalies described above
occur.
To go from the LOCKOUT status to READY it is necessary that the breaker is closed and stays closed for preset time in
Reclaim Time
setting.
AR BLOCK
The BLOCK status is similar to the LOCKOUT status, as it guarantees that if the autoreclose is in Block, no breaker close
command is produced, but the difference between them is that this Block status is reached by an external action. The
autoreclose block can be configured by pulse or level signals. This configuration must be selected at
Setpoint > Relay
Configuration > Protection Elements
When the autoreclose block signal is deactivated, either by a level change in the set signal (in case of block by level) or
by an Unblock pulse (in case of block by pulse), the block status is abandoned and the autoreclose returns to the
Lockout status.
Configurable signals to block the autorecloser are described in section 5.5.3.2 Autoreclose inputs.
5.5.3.5 Logic for blocking protection functions during reclose cycle
The F650 autoreclose generates a series of internal signals that allow performing block logics for Protection elements
during the reclosing cycle. These signals are blocks after autoreclose shots (
BLK AFTER SHOT
). For example, if the user
wants to block a protection element during the complete reclosing cycle, it is necessary to configure a signal as an OR of
the four blocking signals provided after each reclosing cycle in the logic configuration tool
Setpoint > Logic Configuration
,
and then use it to block the desired protection elements at
Setpoint > Relay Configuration > Protection Elements
.
Figure 5-28: clock signal suring reclose cycleshows an example of the logic configuration for the block signal during the
reclosing cycle.
Summary of Contents for F650
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