GE F650 Instruction Manual page 249

5.5 CONTROL ELEMENTS
From READY status, a reclose initiation will set the cycle counter to 1 and a reclosing sequence will be initiated which
will produce breaker close commands, unless any abnormality is produced that will make 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 will go 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 will go 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 will wait 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 will go 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 will go to lockout by failure of closing (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 will reset to its initial value (1), and the autoreclose will return to the standby status (READY). If during the
Reset Time setting period, there is a new autoreclose initiation, the Reclose In Progress sequence will start again. If this
reclose is produced after the last configured cycle in the Maximum Number of Shots setting, the autorecloser will go to
Lockout by maximum number of shots (AR LCK BY SHOTS).
AR LOCKOUT
5
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 will stay in LOCKOUT prior to going to
READY.
From the RECLOSE IN PROGRESS status, the recloser will go 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 will be 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 5.5.5.3.
5-102 F650 Digital Bay Controller
5 SETTINGS
GEK-106310AB