Four-Position Selector Switch Implementation; Figure 135: Four-Position Selector Switch Implementation - GE MiCOM P40 Agile Technical Manual

P14D
AR Mode Select Setting
Command Mode
Opto Set Mode
User Set Mode
Pulse Set Mode
The Live Line Mode is controlled by AR LiveLine Mode. If this is high, the scheme is forced into Live Line Mode
irrespective of the other signals.
7.1.1

FOUR-POSITION SELECTOR SWITCH IMPLEMENTATION

It is quite common for some utilities to apply a four position selector switch to control the mode of operation. This
application can be implemented using the DDB signals AR LiveLine Mode, AR Auto Mode and Telecontrol Mode.
This is demonstrated in the following diagram.
4 POSITION SELECTOR SWITCH
NON AUTO
TELECONTROL
AUTO
LIVE LINE
E00500

Figure 135: Four-position selector switch implementation

The required logic truth table for this arrangement is as follows:
Switch position
Non-auto
Telecontrol
Auto
Live Line
P14D-TM-EN-8
Auto or Non-auto mode selection is determined by the command cell Autoreclose Mode in the CB CONTROL
column.
Auto or Non-auto mode selection is determined by an opto-input mapped to AR Auto Mode
If the AR Auto Mode input is high, Auto operating mode is selected. If the AR Auto Mode input is low, Non-
Auto operating mode is selected.
Auto or Non-auto mode selection is controlled by the Telecontrol Mode input. If the Telecontrol Mode input
is high, the setting Autoreclose Mode in the CB CONTROL column is used to select Auto or Non Auto
operating mode. If the Telecontrol Mode input is low, it behaves as for the Opto Set Mode setting.
Auto or Non-auto mode selection is determined by the falling edge of Telecontrol. If the Telecontrol input is
high, the operating mode is toggled between Auto and Non Auto Mode on the falling edge as it goes low.
The Auto Mode pulses are produced by the SCADA system.
If the Telecontrol input is low, it behaves as for the Opto Set Mode setting.
AR Auto Mode
0
0 or SCADA pulse
1
0
Description
MODE SETTINGS
AUTO COMMAND MODE
OPTO SET MODE
USER SET MODE
PULSE SET MODE
TELECONTROL
LOGIC INPUT
AUTO
LOGIC INPUT
LIVE LINE
LOGIC INPUT
IED
Telecontrol Mode
0
1
0
0
Chapter 13 - Autoreclose
OPERATING MODES
NON AUTO
AUTO
LIVE LINE
AR Live Line Mode
0
0
0
1
263