ABB Relion 670 series, Technical Reference Manual

Page: 646 / 1232

Pulsing of the CB closing command
The CB closing command, CLOSECMD is a pulse with a duration set by parameter
tPulse . For circuit-breakers without anti-pumping function, the close pulse cutting
described below can be used. This is done by selecting the parameter
CutPulse = Enabled . In case of a new trip pulse, the closing command pulse is cut
(interrupted). The minimum duration of the pulse is always 50 ms. See figure 318
When a reclosing command is issued, the appropriate reclosing operation counter is
incremented. There is a counter for each type of reclosing and one for the total number
of reclosing commands issued.
ANSI05000785_2_en.vsd
tPulse
AND
AND
pulse
50 ms
AND
AND
AND
AND
AND
CLOSECMD
COUNT1P
COUNT2P
COUNT3P1
COUNT3P2
COUNT3P3
COUNT3P4
initiate
1PT1
2PT1
3PT1
3PT2
3PT3
3PT4
**) Only if " CutPulse " = Enabled
AND
COUNT3P5
COUNTAR
3PT5
RSTCOUNT
counter
counter
counter
counter
counter
counter
counter
counter
OR
**)
ANSI05000785 V2 EN
Figure 318: Pulsing of closing command and driving the operation counters
Transient fault
After the reclosing command the reset timer tReset starts running for the set time. If no
tripping occurs within this time, the auto-reclosing will reset.
Section 12
1MRK505222-UUS C
Control
640
Technical reference manual