Operating Mode Selection Logic; Autoreclose Initiation; Figure 136: Autoreclose Mode Select Logic - GE MiCOM P40 Agile Technical Manual

Chapter 13 - Autoreclose
7.1.2

OPERATING MODE SELECTION LOGIC

Auto -Reclose
Disable
Enable
AR LiveLine Mode
AR Mode Select
Opto Set Mode
User Set Mode
Pulse Set Mode
Command Mode
Autoreclose Mode
Auto
No Operation
Non Auto
AR Auto Mode
Telecontrol Mode

Figure 136: Autoreclose mode select logic

The mode selection logic includes a 100 ms delay for Auto Mode, Telecontrol and Live Line logic inputs, to ensure
a predictable change of operating modes. This is of particular importance for the case when the four position
switch does not have 'make-before-break' contacts. The logic also ensures that when the switch is moved from
Auto or Non-Auto position to Telecontrol, the scheme remains in the previously selected mode (Auto or Non-Auto)
until a different mode is selected by remote control.
For applications where live line operating mode and remote selection of Auto/Non-auto modes are not required, a
simple two position switch can be arranged to activate Auto Mode input. In this case, the Live Line and
Telecontrol inputs would be unused.
7.2

AUTORECLOSE INITIATION

Autoreclose is usually initiated from the IED's internal protection function. Different stages of phase overcurrent
and earth fault protection can be programmed to initiate or block the main Autoreclose function. The stages of
sensitive earth fault protection can also be programmed to initiate or block both the Main Autoreclose function or
the SEF Autoreclose function.
The associated settings are found in the AUTORECLOSE column under the sub-heading AR INITIATION.
For example:
If I>1 AR is set to Initiate Main AR, operation of the I>1 protection stage will initiate Autoreclose
If ISEF>1 AR is set to No Action, operation of the ISEF>1 protection stage will lead to a CB trip but no reclose.
Otherwise it can be used to initiate Main autoreclose or SEF autoreclose.
Note:
A selection must be made for each protection stage that is enabled.
264
&
&
&
&
&
&
&
&
&
& Enable
Output pulse on
rising edge of 'Tele'
& Enable
Output pulse on
falling edge of 'Auto'
&
&
&
&
1 &
1
S
Q
R
1
&
&
P14D
Autoreclose disabled
Live Line Mode (int)
Non Auto Mode
Auto Mode (int)
V00501
P14D-TM-EN-8