Samlexpower G4-2012A Owner's Manual - Section 5 |
34 | SAMLEX AMERICA INC.
Panel / Load Center (2) is connected to the AC input Ground terminal
of the G4 (GND IN, 11).
• TheACoutputGroundterminaloftheG4(GNDOUT,12)is
connected to the Equipment Grounding Conductor of the AC
output wire which then connects to the Bus Bar for the Equipment
Grounding Conductors of the Inverter Sub Panel (2).
• TheBusBarforEquipmentGroundingConductors(2)oftheinverter
Sub Panel is connected to the Bus Bar for the Equipment Grounding
Conductors (2) of the Service Panel, which in turn is connected to the
Grounding Electrode.
Thus, in keeping with the neC requirements, the AC Grounds of
G4 and the Inverter Sub-panel will be bonded to the earth Ground
only at one single point at the Service Panel feeding the G4.
Typical Shore based Installation
Fig. 5.13 (page 35) illustrates a typical shore based installation
• RemoteControlhasbeenremovedfromthetoppaneloftheunit
and has been connected to the Remote Control Port
• BatteryisconnectedtotheDCinputconnectionsthroughan
appropriate fuse to protect the DC input cables against short circuit
• TheBatteryTemperatureSensorModelBTS-G4isinstalledonthe
Positive post of the battery and connected to the port for the
Temperature Sensor
• Supplementarybatterychargingisbeingcarriedoutthroughasolar
array and a Charge Controller connected to the DC input provided
for external battery charger. The following Solar products from
Samlex America, Inc. are recommended:
•
SolarKits
•
SolarExpansionKits
•
ChargeControllers
• ACinputtotheG4isfedfromtheServicePanel/LoadCenter
• ACoutputfromtheG4isfedtotheInverterSubPanel
RV Installation – General Information
GFCI Protection For Vehicle Application. When this unit is installed in
vehicles, it is to be ensured that Ground Fault Circuit Interrupter(s) [GFCI]
are installed in the vehicle wiring system to protect all branch circuits
The following GFCIs have been tested to operate satisfactorily and are
acceptable:
Manufacturer
of GFCI
Manufacturer
Model no.
Description
Pass & Seymour
2095W
NEMA5-20 Duplex 20A
Pass & Seymour
1595-W
NEMA5-15 Duplex 15A
Leviton
7899-W
NEMA5-20 Duplex 20A
Leviton
T7599-W
NEMA5-15 Duplex 15A
Leviton
7599-W
NEMA5-15 Duplex 15A
Requirement of Deep Cycle, Auxiliary battery And battery Isolator For
Powering Inverters In RV / Vehicles. For details, read on-line white Paper
titled "Batteries, Chargers & alternator" at:
www.samlexamerica.com (Home > support > white Papers).
An Rv / vehicle has Starter, Lighting and Ignition (SLI) battery. As explained
in White Paper titled “Batteries, Chargers and Alternators”, SLI batteries
are designed to produce high power in short bursts for cranking.
SLI batteries use lots of thin plates to maximize the surface area of the
plates for providing very large bursts of current (also specified as Cranking
Amps). This allows very high starting current but causes the plates to warp
when the battery is cycled. vehicle starting typically discharges
1%–3% of a healthy SLI battery’s capacity. The automotive SLI battery is
not designed for repeated deep discharge where up to 80% of the battery
capacity is discharged and then recharged. If an SLI battery is used for this
type of deep discharge application, its useful service life will be drastically
reduced. Hence, this type of battery is not recommended for the storage
of energy for inverter applications. A second deep cycle auxiliary battery
must be installed in the Rv for powering the G4 (A deep cycle, auxiliary
battery is shown in Fig. 5.14 (page 36).
When the second auxiliary deep cycle battery is used, a Battery Isolator
is required that will allow parallel connection of the two batteries for
charging when the alternator is on and disconnecting the parallel
connection when the alternator is stopped (Isolator is shown in Fig. 5.14).
The capacity of the Battery Isolator should be as follows:
• For G4-2012A: The maximum continuous DC current required by
G4-2012A is 250A. The capacity of the Battery Isolator should be
more than 250A or more than the capacity of the alternator,
whichever is higher
• For G4-2524A: The maximum continuous DC current required by
G4-2524A is 150A. The capacity of the Battery Isolator should be
more than 150A or more than the capacity of the alternator,
whichever is higher
• For G4-3524A: The maximum continuous DC current required by
G4-3524A is 215A. The capacity of the Battery Isolator should be
more than 215A or more than the capacity of the alternator,
whichever is higher
Requirement of external Transfer Relay When Using Generator
or Shore Power To Feed AC Input To G4
Some Rvs have on-board / outboard generator to power larger AC loads
like air-conditioner. The generator feeds the Main AC Panel of the Rv
through a manual Transfer Switch or through an Automatic Transfer Relay.
This is to ensure that only one AC source (either the shore power or the
generator) feeds the Main AC Panel at one time and that the two AC
sources (shore power / generator) do not operate in parallel at any time.
When generator power is not available, the shore power is connected
to the Main AC Panel. When the Generator is started, the Transfer Relay
senses the incoming generator power and after a specified delay (equal to
warm up time of generator of 20 to 30 sec), disconnects the shore power
first from the Main AC Panel and then connects the generator power to
the Main AC Panel. A Transfer Relay is shown in Fig. 5.14.
Requirement To Keep The neutral Conductor
of Shore Power Isolated From The Chassis
Ground of The RV
as explained in on-line white Paper titled “grounded electrical
Power distribution system” at www.samlexamerica.com (Home >
support > white Papers), in the Rv, the Neutral Bus Bar is NOT bonded
to the Chassis of the Rv. In the Rv, the Neutral is floating with respect to
the chassis of the Rv. This is necessary for safety because if the Neutral
was bonded to the chassis of the Rv and if the Neutral and the Hot got
reversed by mistake, the chassis of the Rv will be at 120 vAC with respect
to the Earth Ground. If a person standing on the Earth Ground touches
the chassis of the Rv, he will be fed with 120 vAC and he will
be electrocuted!