Table of Contents
Advertisement
P54A/B/C/E
5.10.2
3-PHASE AUTORECLOSE CYCLE SELECTION
CB1 L ARIP
CB1 L3 PAROK
Evolve 3Ph
TMEM3P
CB1 OP2 /3P
TMEM ANY
CB1 L SPAROK
V03334
Figure 72: Three-phase Autoreclose Cycle Selection logic diagram (Module 21)
5.11
DEAD TIME CONTROL
Once an Autoreclose cycle has started, the conditions to enable the dead time to run are determined by the menu
settings, the circuit breaker status, the protection status, the nature of the AR cycle (single-phase or three-phase),
and the opto-isolated inputs from external sources.
Three settings are involved in controlling the dead time start:
DT Start by Prot
●
●
3PDTStart WhenLD
DTStart by CB Op
●
The DT Start by Prot determines how the protection action will initiate a dead time. The setting is always visible
and has three options Protection Reset, Protection Op (protection operation), and Disable which
should be selected if you don't want protection action to start the dead time. These options set the basic
conditions for starting the dead time.
Selecting protection operation to start the dead time can, optionally, be qualified by a check that the line is dead.
Selecting protection reset to start the dead time can, optionally, be qualified by a check, that the circuit breaker is
open (DTStart by CB Op) before starting the dead time. For three-phase tripping applications, there is a further
option to check that the line is dead (3PDTStart WhenLD) before starting the dead time.
If DT Start by Prot is disabled, the circuit breaker must be open for the dead time to start. For three-phase tripping
applications, there is an option to check that the line is dead (3PDTStart WhenLD) before starting the dead time. To
check that the line is dead, set 3PDTStart WhenLD to enabled. To check that the circuit breaker is open, set
DTStart by CB Op to Enabled.
P54xMED-TM-EN-1
1
&
&
S
Q
R
Chapter 7 - Autoreclose
CB1L 3PAR
AR 3 pole in prog
159
Advertisement
Table of Contents
Troubleshooting
