ABB RELION 620 Series Technical Manual page 732

Section 9
Control functions
9.2.4.5
726
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Figure 370: Initiation after elapsed discrimination time - new shot begins
Sequence controller
When the LOCKED output is active, the AR function is in lockout. This means that new
sequences cannot be initialized, because AR is insensitive to initiation commands. It can
be released from the lockout state in the following ways.
• The function is reset through communication with the RsRec parameter.
• The lockout is automatically reset after the reclaim time, if the Auto lockout reset
setting is in use.
If the Auto lockout reset setting is not in use, the lockout can be released
only with the RsRec parameter.
The AR function can go to lockout for many reasons.
• The INHIBIT_RECL input is active.
• All shots have been executed and a new initiation is made (final trip).
• The time set with the Auto wait time parameter expires and the automatic sequence
initiation is not allowed because of a synchronization failure.
• The time set with the Wait close time parameter expires, that is, the circuit breaker
does not close or the automatic sequence initiation is not allowed due to a closing
failure of the circuit breaker.
• A new shot is initiated during the discrimination time.
• The time set with the Max wait time parameter expires, that is, the master unit does
not release the slave unit.
1MAC504801-IB E
620 series ANSI
Technical Manual