2 Functions
134
7ST6 Manual
E50417-G1176-C251-A3
Figure 2-40
Static blocking
If a TRIP command occurs while the auto reclose function is statically blocked, the
function passes to the dynamic blocking state.
Possible Causes of
Dynamic Blocking
The table below summarizes the possible causes of dynamic blocking:
Table 2-6
Possible causes of dynamic blocking
Causes of dynamic blocking
Resulting indication(s)
Binary input 2703 „>BLOCK AR“ active
2703 „>BLOCK AR“
TRIP out of action time
2829 „AR Tact expired“
Start signal monitoring time expired
2809 „AR T-Start Exp“
Dead time extension time expired
2810 „AR TdeadMax Exp“
Circuit breaker ready monitoring window expired
2788 „AR T-CBreadyExp“
Reclaim time expired without CB CLOSE
2785 „AR DynBlock“
Fault in reverse direction
13882 „AR BLK DIR“
Thermal overload pickup with auto reclosure running
2805 „Th-AR in prog“
Current has reached the limit value 3411 „AR DynBlock“ 13883 „AR BLK I MAX“
Manual close command
13885 „AR BLK MC“
No more cycles possible
2863 „AR Lockout“
TRIP command from circuit breaker failure protection
13884 „AR BLK BF“
TRIP during static blocking
No indication
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