ABB RELION 620 Series Technical Manual page 731

1MAC504801-IB E
620 series ANSI
Technical Manual
When the reclose time has elapsed, the CLOSE_CB output is not activated until the
following conditions are fulfilled:
• The SYNC input must be TRUE if the particular CBB requires information about the
synchronism
• All AR initiation inputs that are defined protection lines (using the Control line
setting) are inactive
• The circuit breaker is open
• The circuit breaker is ready for the close command, that is, the CB_READY input is
TRUE.
If at least one of the conditions is not fulfilled within the time set with the Auto wait time
parameter, the autoreclose sequence is locked.
The synchronism requirement for the CBBs can be defined with the Synchronisation set
setting, which is a bit mask. The lowest bit in the Synchronisation set setting is related to
CBB1 and the highest bit to CBB7. For example, if the setting is set to "1", only CBB1
requires synchronism. If the setting is it set to "7", CBB1, CBB2 and CBB3 require the
SYNC input to be TRUE before the reclosing command can be given.
A070873-ANSI V1 EN
Figure 369: Initiation during discrimination time - AR function goes to lockout
The discrimination time starts when the close command CLOSE_CB has been given. If a
pickup input is activated before the discrimination time has elapsed, the AR function goes
to lockout. The default value for each discrimination time is zero. The discrimination time
can be adjusted with the Dsr time shot 1...4 parameter.
Section 9
Control functions
725