USER MANUAL
EarthGuard – EG-300
Australian Energy Research Labs
AER013 – Rev 1.1
21st July 2020
11
AER013 REV 1.1
Adjusting the Trip Sensitivity
The EarthGuard device currently has two trip sensitivity levels, each tailored for the respective supported
battery voltages (48V & 120V).
By default, the EG-300’s are set to 48V, but this can be adjusted to 120V by removing the Jumper
Connection located on the central two pins of the
CON2
header while the device is powered down.
Alarm Indication Relay
The EarthGuard features a dry contact signal relay for use with the CoolMax SRX and other external
devices (such as the Victron Venus GX) in order to alert the appropriate personal to the presence of a fault
if the device is installed in a remote location where the audible buzzer will not be heard.
This alarm relay will
Open
when the device either loses power or an earth fault has been detected.
When the system is All Clear, the relay contact will be
Closed.
The Relay Terminal (
J5
) is located on the top right-hand corner of the PCB and is visible with the access
cover removed.
