The empty cells in the table indicate that no such transition is possible.
Table 175: Status transition matrix
To →
inactive ready in progress
(dead time)
reclaim time blocked
From ↓
inactive activate
CBCLOSED
and
CBREADY
activate
BLKON
ready deactivate
CBCLOSED
or CBREADY
or activate
INHIBIT or
RESET
activate
START or
activate
STARTHS
activate
BLKON
in progress
(dead time)
activate
INHIBIT or
RESET
when
CBCLOSED
issued
activate
BLKON
reclaim time activate
RESET or
INHIBIT
activate
START and
the last shot
has not been
reached yet
activate
BLKON
blocked deactivate
CBCLOSED
or CBREADY
and activate
BLKOFF
activate
BLKOFF and
CBCLOSED
and
CBREADY
12.2.6.4 Functional sequence description
GUID-C73A160D-330B-4627-B8F0-A31C9B3F7417 v1
To comprehend this chapter better it is essential to first read chapters “Status
descriptions“ and “Description of the status transition” carefully.
The logic for most of the explained inputs, outputs, settings and internal signals,
described in this chapter, is shown in Figure 157. Other figures mentioned are in
some way connected or cooperate with Figure 157.
Before going into details in the following chapters, the short functional/feature
summary is given below.
The auto reclosing function is multi-shot capable and suitable for both high-speed
and delayed auto reclosing. The function can be set to perform a single-shot, two-
shot, three-shot, four-shot or five-shot reclosing sequence. Dead times for all shots
can be set independently.
An auto recloser sequence can be initiated by:
• protection operation
• circuit breaker operation (when enabled by setting StartByCBOpen=On)
At the end of the dead time, provided that other conditions are fulfilled, a circuit
breaker close command signal is given. The other conditions to be fulfilled are:
Section 12 1MRK 505 394-UEN A
Control
328 Line differential protection RED650 2.2 IEC
Technical manual
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