USER MANUAL
EarthGuard – EG-300
Australian Energy Research Labs
AER013 – Rev 1.1
21st July 2020
9
AER013 REV 1.1
Wiring Information
The EarthGuard can be installed on to either a
48V
or
120V
Nominal Battery Bus in systems with a
connected PV array not exceeding
300V DC.
Wire and Disconnect Sizing
EarthGuard EG-300
•
The 5V Input (USB-C) and fault monitoring lines are internally fused. The 12V input is not fused
and requires an appropriately sized disconnect when not being powered from the CoolMax SRX
12V line (which is fused internally on the SRX side).
•
A jumper connection allows for the choice between 5V and 12V power. The EarthGuard ships
with the jumper located on
JP2
for
5V (USB-C)
from factory and must be moved to
JP1
to power
the device from a
12V
source.
•
14 to 24 AWG (0.2 mm
2
-> 2.08 mm
2
) may be used for all internal terminal connections.
•
Use an insulated flat blade screwdriver to secure the connections.
•
Torque all terminal connections to 0.6 Nm (5 in-lb).
To install cabling and configure the device
, the 4 x M4 CSK Phillips Screws holding the lid in place
must be removed. When removing the lid, gently disconnect the 10-way cable from the circuit board and
re-fit the cable prior to powering up the device.
CAUTION – Hazard
All EarthGuard wiring must enter the unit through the cable glands in the base plate or
through the top of the enclosure with the top plate removed when being installed in an
integrated configuration with a CoolMax SRX charge controller.
Under absolutely
no circumstances
should holes be drilled anywhere into the unit to
make other cable entry points. Doing so can cause metal swarf or fillings to enter the
internal electronics and damage the unit once powered up.
Wiring Compartment
IMPORTANT
•
Use appropriate Personal Protective Equipment when handling live connections and
disconnect all power sources prior to making any wiring configuration changes.
IMPORTANT
•
DO NOT
remove the lower 2 x M4 CSK Screws from the USB-C panel as this may
cause alignment issues with the USB connection port.
•
