ABB RELION REX640 Technical Manual page 1535

1MRS759142 C
REX640
Technical Manual
Setting name
Shot number CBB2
Init signals CBB2
Second reclose time
Example 2
There are two separate sequences implemented with three shots. Shot 1 is
implemented by CBB1 and it is initiated with the high stage of the overcurrent
protection (I>>). Shot 1 is set as a high-speed autoreclosing with a short time delay.
Shot 2 is implemented with CBB2 and meant to be the first shot of the autoreclose
sequence initiated by the low stage of the overcurrent protection (I>) and the low stage
of the non-directional earth-fault protection (Io>). It has the same reclosing time in
both situations. It is set as a high-speed autoreclosing for corresponding faults. The
third shot, which is the second shot in the autoreclose sequence initiated by I> or Io>,
is set as a delayed autoreclosing and executed after an unsuccessful high-speed
autoreclosing of a corresponding sequence.
GUID-41130CCD-1B03-43CC-BCDE-576C783BEE49 V1 EN
Figure 807: Autoreclosing sequence with two shots with different shot settings
according to initiation signal
t Time delay of high-speed autoreclosing, here:
HSAR
t Time delay of delayed autoreclosing, here:
DAR
t Operating time for the I>> protection stage to clear the fault
l>>
Control functions
Setting value
2
7 (lines 1, 2 and 3 = 1+2+4 = 7)
15.0 s (an example)
First reclose time
Second reclose time
Section 9
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