ABB Relion 670 series - Control of the auto-reclosing open time for shot 1

ANSI05000782_2_en.vsd
Operation
:Enabled
AND
AND
AND
S
R
AND
AND
AND
SETON
initiate
PICKUP
READY
52a
CBREADY
TRSOTF
RI
OFF
ON
Additional conditions
RI_HS
autoInitiate
0-tCBClosedMin
CB Closed
AND
S
Blocking conditions
Inhibit conditions
count 0
AND
OR
R
OR
0
0
0-t120
AND
Operation:Disabled
Operation:External Ctrl
OR
OR
OR
ANSI05000782 V2 EN
Figure 315: Auto-reclosing Disabled/Enabled and start
12.2.2.5 Control of the auto-reclosing open time for shot 1
It is possible to use up to four different time settings for the first shot, and one
extension time. There are separate settings for single- , two- and three-phase auto-
reclosing open times, t1 1Ph, t1 2Ph, t1 3Ph. If no particular input signal is applied,
and an auto-reclosing program with single-phase reclosing is selected, the auto-
reclosing open time t1 1Ph will be used. If one of the inputs TR2P or TR3P is activated
in connection with the input START, the auto-reclosing open time for two-phase or three-
phase reclosing is used. There is also a separate time setting facility for three-phase high-
speed auto-reclosing, t1 3PhHS available for use when required. It is activated by input
RI_HS.
An auto-reclosing open time extension delay, tExtended t1, can be added to the normal
shot 1 delay. It is intended to come into use if the communication channel for
permissive line protection is lost. In a case like this there can be a significant time
difference in fault clearance at the two line ends. A longer auto-reclosing open time
can then be useful. This extension time is controlled by setting parameter Extended t1
= Enabled and the input PLCLOST.
Section 12 1MRK505222-UUS C
Control
636
Technical reference manual