Chapter 2) 7XG3124 Application Guide
©2014 Siemens Protection Devices Limited Chapter 2 Page 41 of 42
5.8 Global Arc Block
Indicates solid when the Global Arc Block input is energised, all Arc Trips are blocked (61850 and Arc
Trip outputs).
Global Arc Block
5.9 Flag Reset
To reset the ARC Sensor LEDs
The ARC sensor LEDs may also be reset by energising the
binary input
Figure 54: RA24 Flag Reset
5.10 Reboot
A reboot is achieved by applying power to the relay, all the Leds will flash once and
then extinguish and then in turn sequentially illuminate 1 led at a time until all Leds are
illuminated – the sequence takes about 14 secs.
Alternatively if the relay is powered, hold down the Flag Reset button for about 5 sec
until all of the Leds (except Service) start flashing, then release the Flag Reset button.
The LEDs will continue to flash for approx 9 secs and then extinguish and then in turn
sequentially illuminate 1 led at a time until all Leds are illuminated – the sequence
takes another 14 secs approx.
The reboot must be used after loading in new .icd files into the IED and restarting the
software process with the new 61850 configurations.
The reboot may also be required if for some reason the RA24 does not respond to
web server commands or becomes unresponsive to ftp or terminal sessions.
5.11 Reset To Factory Default
With the relay unpowered, hold down the Flag Reset button and power up the relay.
After releasing the reset button all of the Leds (except Service) will flash once and then
extinguish and then in turn sequentially illuminate 1 led at a time until all Leds are
illuminated – the sequence takes another 14 secs approx.
The Cold Boot is used for reverting the IED back to factory default settings including
default passwords.
Figure 53: RA24 Global Arc Block
Figure 55: RA24 Reboot
Figure 56: RA24 Reset to Factory Default
