Sequence Co-Ordination; Figure 150: Lockout For Protection Trip When Ar Is Not Available - GE MiCOM P40 Agile Technical Manual

P14D
manual closing during the AR Inhibit Time when the Man Close on Flt setting is set to Lockout. This is shown as
follows:
Ext. Trip 3ph
Main Protection Trip
SEF Protection Trip
Autoreclose inhibit
Man Close on Flt
Lockout
No Lockout
Live Line Mode
Non Auto mode
Lockout Alarm
Trip AR Inactive
Lockout
No Lockout
V00514

Figure 150: Lockout for protection trip when AR is not available

Note:
Lockout can also be caused by the CB condition monitoring functions in the CB MONITOR SETUP column.
The Reset Lockout input can be used to reset the Autoreclose function following lockout and reset any Autoreclose
alarms, provided that the signals that initiated the lockout have been removed. Lockout can also be reset from the
clear key or the command Lockout Reset from the CB CONTROL column.
There are two different Reset Lockout by settings. One in the CB CONTROL column and one in the AUTORECLOSE
column.
The Reset Lockout by setting in the CB CONTROL column is used to enable or disable reset of lockout
automatically from a manual close after the manual close time Man Close RstDly.
The Reset Lockout by setting in the AUTORECLOSE column is used to enable/disable the resetting of lockout when
the IED is in the Non-auto operating mode. The reset lockout methods are summarised in the following table:
User Interface via the Clear key.
Note: This will also reset all other protection flags
User interface via CB CONTROL command Lockout Reset
Opto-input Reset lockout
Following a successful manual close if CB CONTROL setting Reset Lockout by is set to
CB Close
By selecting Non-Auto mode, provided AUTORECLOSE setting Reset Lockout by is set to
Select NonAuto
7.10

SEQUENCE CO-ORDINATION

The Sequence Co-ord setting in the AUTORECLOSE menu allows sequence co-ordination with other protection
devices, such as downstream pole-mounted reclosers.
The main protection start or SEF protection start signals indicate when fault current is present, advance the
sequence count by one and start the dead time, whether the CB is open or closed. When the dead time is
complete and the protection start inputs are low, the reclaim timer is initiated.
You should program both the upstream and downstream Autoreclose IEDs with the same number of shots to
lockout and number of instantaneous trips before instantaneous protection is blocked. This will ensure that for a
persistent downstream fault, both Autoreclose IEDs will be on the same sequence count and will block
P14D-TM-EN-8
1
&
1
&
Reset Lockout Method
1
Always
Always
Always
Only when set
Only when set
Chapter 13 - Autoreclose
Protection Lockt
When Available?
275