One also has to configure and connect signals from manual trip commands to input
INHIBIT.
The logic for switching the auto-recloser Enabled/Disabled and the starting of the
reclosing is shown in figure
103. The following should be considered:
• Setting Operation can be set to Disabled, External ctrl or Enabled. External ctrl
offers the possibility of switching by external switches to inputs ON and OFF,
communication commands to the same inputs, and so on.
• SMBRREC (79) is normally started by tripping. It is either a Zone 1 and
Communication aided trip or a general trip. If the general trip is used the function
must be blocked from all back-up tripping connected to INHIBIT. In both alternatives
the breaker failure function must be connected to inhibit the function. RI makes a first
attempt with synchronism-check. TRSOTF starts shots 2-5.
• Circuit breaker checks that the breaker was closed for a certain length of time before
the starting occurred and that the CB has sufficient stored energy to perform an auto-
reclosing sequence and is connected to inputs 52a and CBREADY.
Operation:Enabled
Operation:Disabled
Operation:External Ctrl
AND
AND
AND
S
R
AND
AND
AND
SETON
initiate
pickup
READY
52a
CBREADY
TRSOTF
RI
OFF
ON
Additional conditions
ANSI08000017-2-en.vsd
autoInitiate
CB Closed
AND
S
Blocking conditions
Inhibit condistions
count 0
AND
OR
OR
OR
R
OR
AND
120 ms
0
0
0-tCBClosedMin
ANSI08000017 V2 EN
Figure 103: Auto-reclosing Disabled/Enabled and start
Section 10 1MRK 511 287-UUS A
Control
242
Technical manual
To Next Page
Loading...
Need help?
General
