USER MANUAL
EarthGuard – EG-300
Australian Energy Research Labs
AER013 – Rev 1.1
21st July 2020
8
AER013 REV 1.1
Installation Standards
All installations must comply with national and local electrical standards and codes of practice. AERL
always recommends professional installation.
The EarthGuard EG-300 can be used to fulfil the earth fault/leakage detection requirements of AS/NZS
5033:2014 and 5139:2019 for unearthed PV and Battery installations.
Please refer to the
Detection Requirements
section below to determine the configuration that is required
for your application.
Detection Requirements
If the PV Array
is not Galvanically Isolated
from the battery bank (AERL and Victron regulators are not
isolated as they are Common Positive and Common Negative designs respectively), the battery bank’s
potential Earth Fault Voltage is considered to be that of the connected PV Array and thus requires earth
fault/leakage detection on both the Battery and PV Array
if the array exceeds 60Vdc.
That said, because the
AERL
and
Victron
regulators are not galvanically isolated, only a
single
EarthGuard is required to cover both the array and battery bank due to the common (positive & negative)
electrical connections and the sensitivity of the EarthGuard device.
If the PCE
is Galvanically Isolated,
and the battery bank is
below DVC-C,
earth fault/leakage detection is
only required on the PV Array (provided it is above 60Vdc).
Mounting the Device
The EarthGuard should be fixed to a vertical surface using the mounting holes in the chassis flanges.
If the device is being used with an AERL CoolMax SRX Solar Charge Controller, the top plate can be
removed from the EarthGuard and the device can be mounted seamlessly against the base of the
CoolMax.
Seamless EarthGuard mounting requires that the CoolMax solar charge controller is installed using the
reverse cable entry ports, and the base cable glands have been removed from the controller prior to
installation of the EarthGuard device.
Installation
IMPORTANT
The EarthGuard must be installed in a clean, dry location away from direct sunlight and moisture.
