Samlexpower Evolution EVO-2212 Owner's Manual page 54

SECTIOn 3 |
• thus, in keeping with the nec requirements, the Ac grounds of evo, grid electrical
Panel and the generator will be bonded to the earth ground only at one single point
at the grid electrical Panel feeding the evo.
3.14.1 Switching of bonDing of outPut neutrAl to chASSiS grounD
As required by NEC and uL Standard 458, automatic switching of bonding between the Output
Neutral and Chassis Ground has been provided in EVO through "Output Neutral and Chassis
Ground bond Switching relay" [K4 in figs 4.1(a) and 4.1(b)]. Switching is carried as follows:
• When operating as an inverter, the current carrying conductor of the Inverter Section that
is connected to the Output Neutral terminal of the EVO is bonded to the metal chassis of
EVO by the "Output Neutral to Chassis Ground bond Switching relay" [K4 in figs 4.1(a) and
4.1(b)]. As the metal chassis of EVO is in turn bonded to the Earth Ground (in shore installa-
tions) or rV Ground (chassis of the rV) or to the boat Ground (DC Negative Grounding bus
bar and the Main AC Grounding bus bar are tied together in a boat and this is called the
"boat Ground"), this current carrying conductor of the Inverter Section (connected to the
Output Neutral Terminal) will become the Grounded Conductor (GC) or the Neutral of the
Inverter Section.
• When in Charging Mode, the Neutral conductor of the Grid power/Generator will be con-
nected to the Output Neutral terminal of EVO. At the same time, the "Output Neutral to
Chassis Ground bond Switching relay" [K4 in figs 4.1(a) and 4.1(b)] will unbond (discon-
nect) the Output Neutral connector of EVO from the metal chassis of EVO. This will ensure
that the Grounded Conductor (GC) i.e. the Neutral of the Grid power/Generator is bonded
to the Earth Ground at one single point at the location of the AC Power Distribution System
of the Marina / rV Park / Shore Power.
• Disabling neutral to ground bond: In some applications, the Output Neutral of EVO
may be required to remain isolated from the chassis/Ground at all times. for this, automatic
Ouput Neutral to Chassis Ground bond can be disabled by disconnecting the Male/female
Quick Disconnect located in the AC wiring compartment. [Please see (i) 13, fig 3.9 and
(ii) "QD" in figs 4.1(a) and 4.1(b)].
- "neutral to ground Switching in rv and marine Application
54 | SAMLEX AMErICA INC.
Installation