ABB RELION Series, Technical Manual

Page: 646 / 804

issues a
CLOSE_CB
command. When the wait close time elapses, that is, the closing
of the circuit breaker fails, the next shot is automatically started. Another example is
the embedded generation on the power line, which can make the synchronism check
fail and prevent the reclosing. If the autoreclose sequence is continued to the second
shot, a successful synchronous reclosing is more likely than with the first shot, since
the second shot lasts longer than the first one.
A070870 V1 EN
Figure 333: Logic diagram of auto-initiation sequence detection
Automatic initiation can be selected with the Auto initiation Cnd setting to be the
following:
Section 9
1MRS758755 A
Control functions
640 REC615 and RER615
Technical Manual