Shot Initiation From Protection Start Signal - ABB RELION REX640 Technical Manual

1MRS759142 C
9.9.6.5
REX640
Technical Manual
DEL_INIT_2 and INIT_2 are connected together with an OR-gate, as are inputs 3
and 4. Inputs 1, 5 and 6 do not have any delayed input. From the autoreclosing point
of view, it does not matter whether INIT_x or DEL_INIT_x line is used for shot
initiation or blocking.
The autoreclose function can also open the circuit breaker from any of the initiation
lines. It is selected with the Tripping line setting. As a default, all initiation lines
activate the OPEN_CB output.
GUID-FCAA6D78-83FC-476B-820B-4EAFD3F8E0FF V1 EN
Figure 809: Simplified logic diagram of initiation lines
Each delayed initiation line has four different time settings:
Table 1402: Settings for delayed initiation lines
Setting name
Str x delay shot 1
Str x delay shot 2
Str x delay shot 3
Str x delay shot 4

Shot initiation from protection start signal

In it simplest, all auto-reclose shots are initiated by protection trips. As a result, all trip
times in the sequence are the same. This is why using protection trips may not be the
Control functions
Description and purpose
Time delay for the DEL_INIT_x line, where x is
the number of the line 2, 3 or 4. Used for shot 1.
Time delay for the DEL_INIT_x line, used for shot
2.
Time delay for the DEL_INIT_x line, used for shot
3.
Time delay for the DEL_INIT_x line, used for
shots 4 and 5. Optionally, can also be used with
SOTF.
Section 9
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