56 | SAMLEX AMERICA INC.
SAMLEX AMERICA INC. | 57
SECTION 3 |
Installation
• The metal chassis of the AC load(s) is connected to the Grounding Bus Bar (G-B) of the
Electrical Sub Panel for EVO
TM
Output
• Grounding Bus Bar (G-B) of the Electrical Sub Panel for EVO
TM
Output is connected to
metal chassis of EVO
TM
through the “OUTPUT GND” Terminal (25) of the AC Input /
Output Terminal Block (20) in EVO
TM
.
• The metal chassis of EVO
TM
is connected to the “GRID GND” Terminal (22) of the AC
Input / Output Terminal Block (20) in EVO
TM
• The “INPUT GND” Terminal (23) of the AC Input / Output Terminal Block (20) in EVO
TM
gets connected to the Grounding Bus Bar (G-B) in the Electrical Panel of the RV / vehicle
through the grounding wire of AC input connection
• The Grounding Bus Bar (G-B) in the Electrical Panel of the RV / vehicle is bonded to the
RV / Vehicle Chassis Ground. When the RV / vehicle is connected to the Grid through
the Grid Power Inlet and Cord, the RV / Vehicle Chassis Ground gets bonded to the
Earth Ground of the premises through the Grounding Electrode (GE) / “Ground Rod” of
the premises of the Grid Power System supplying the RV / Vehicle
•
Thus, in keeping with the NEC requirements, the AC Grounds of EVO
TM
and the
Grid Electrical Panel will be bonded to the Earth Ground only at one single point at
the Grid Electrical Panel feeding the EVO
TM
.
3.14.4 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
TM
through “Output Neutral and Chassis
Ground Bond Switching Relay” (RY2 in Fig 4.1). 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
TM
is bonded to the metal chassis of
EVO
TM
by the “Output Neutral to Chassis Ground Bond Switching Relay” (RY2 in Fig 4.1). As
the metal chassis of EVO
TM
is in turn bonded to the Earth Ground (in shore installations) 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 Termi-
nal) will become the Grounded Conductor (GC) or the Neutral of the Inverter Section.
• When in Charging Mode, the Neutral conductor of the Grid power will be connected to the
Output Neutral terminal of EVO
TM
. At the same time, the “Output Neutral to Chassis Ground
Bond Switching Relay” (RY2 in Fig 4.1) will unbond (disconnect) the Output Neutral connec-
tor of EVO
TM
from the metal chassis of EVO
TM
. This will ensure that the Grounded Conductor
(GC) i.e. the Neutral of the Grid power 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
TM
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 Insulated
Male/Female Quick Disconnect located in the AC wiring compartment. [Please see (i) 27, Fig
3.9.2(a) and (ii) "27" in Figs 4.1].
Please read the following on-line White Papers for more details at www.samlexamerica.com
(Home > Support > White Papers):
- “Neutral to Ground Switching in RV and Marine Applications
Содержание Evolution EVO-1212F
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