• 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 auto-reclose 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 V1 EN
Figure 383: Initiation during discrimination time - AR function goes to lockout
The discrimination time starts when the close command CLOSE_CB has been
given. If a start 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 1YHT530004D05 D
Control functions
704 615 series
Technical Manual
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