Samlexpower Evolution EVO-2212 Owner's Manual page 53

SECTIOn 3 |
Terminals "G2", "G-b" and GE in fig 3.12) If separate thicker grounding wire of the
same size as the battery cable was not provided for the DC side grounding and there was a
ground fault in the battery circuit, very large DC fault current from battery+ would flow through
the smaller size AC grounding wires to the battery Negative through Earth Ground. These smaller
size AC side grounding wires would be damaged due to very high DC side fault current (150A to
400A depending on the Model of the EVO being used).
A DC Side Grounding Connector (G2) (5 in the DC side layout in fig. 2.1) is provided for con-
necting to the System Ground. The connector can accept wire sizes AWG # 4–6. The set screw
size is M8.
A DC Distribution Panel, as shown in fig. 3.12, is normally provided to connect the batteries
and distribute DC power to the inverter and to the other DC loads.
The Negative of the battery is connected to the Neg (-) bus of the DC Electrical Panel which, in
turn, is connected to its Grounding bus bar (G-b). Grounding bus bar G-b of the DC Electrical
Panel is further bonded to the Grounding bus bar "G-b" of the Grid Electrical Panel and then to
the Grounding Electrode (GE), also called Ground rod. hence, the battery Negative, the chas-
sis of the DC Electrical Panel and the metal chassis of the EVO will all be bonded to the Earth
Ground.
Connect the DC Grounding Terminal (G2) (5 in the DC side layout in fig. 3.8), to the Grounding
bus bar (G-b) in the DC Electrical Panel using AWG #6 insulated stranded copper wire. Similarly,
use AWG #6 wire to connect the Grounding bus bar "G-b" in the DC Electrical Panel to the
Grounding bus bar "G-b" in the Grid Electrical Panel. for application of EVO on a boat, the size
of this wire should be of the same size or one size smaller than the battery Negative wire (See
CAuTION! above).
The connections must be tight against bare metal. use star washers to penetrate paint and
corrosion. As the equipment grounding bus bar ("g-b") in the Dc electrical Panel is
bonded to the grounding electrode (ge) through grounding bus bar "g-b" in the grid
electrical Panel, the metal chassis of the evo will be bonded to earth ground for pro-
tection against ground fault on the Dc side of evo.
3.14 Ac SiDe grounDing (PleASe See fig 3.12)
• In EVO, the AC Input Grounding Terminals {GEN GND (8), GRID GND (5)} and AC Ouput
Grounding Terminals {OuTPuT GND (11)}, are internally bonded to the metal chassis of the
inverter (G1)
• The Grounding Wires from Grid/Generator are connected to the AC input Ground terminals in
EVO {GrID GND (5), GEN GND (8)}.
• The AC output Ground wire of EVO {OUTPUT GND (11)} is connected the Grounding Bus Bar
(G-b) of the Electrical Sub-Panel for EVO.
• The Grounding Bus Bar (G-B) of the Electrical Sub-Panel for EVO is connected to the Grounding
bus bar (G-b) of the Grid Electrical Panel.
• The AC Ground (E) of the Generator is also connected to the Grounding bus bar (G-b) of the
Grid Electrical Panel.
• The Grounding bus bar (G-b) of the Grid Electrical Panel is bonded to the Grounding Electrode
(GE) e.i. the Ground rod.
Installation
SAMLEX AMErICA INC. | 53