37
SAMLEX AMERICA INC. | 37
SECTION 8 |
Installation
8.5 AC SIDE CONNECTIONS
WARNING! Preventing Paralleling of the AC Output
1. The AC output of the inverter cannot be synchronized with another AC
source and hence, it is not suitable for paralleling. The AC output of the
inverter should never be connected directly to an electrical Panelboard / Load
Center which is also fed from the utility power/ generator. Such a connection
will result in parallel operation and AC power from the utility / generator will
be fed back into the inverter which will instantly damage the output section
Panelboard / Load Center is being fed from the utility power / generator and
the inverter is required to feed this panel as backup power source, the AC
to a manual selector switch / Automatic Transfer Switch and the output of
the manual selector switch / Automatic Transfer Switch should be connected
to the electrical Panelboard / Load Center.
2. To prevent possibility of paralleling and severe damage to the inverter, never
use a simple jumper cable with a male plug on both ends to connect the AC
output of the inverter to a handy wall receptacle in the home / RV.
8.5.1 AC Output Connection Through Ground Fault Circuit
Interrupter (GFCI)
An un-intentional electric path between a source of current and a grounded surface
is referred to as a “Ground fault”. Ground faults occur when current is leaking some-
where. In effect, electricity is escaping to the ground. How it leaks is very important. If
your body provides a path to the ground for this leakage (dry human body has a low
resistance of
only around
1 K ohm),
you could be injured, burned, severely shocked
or electrocuted. A Ground fault Circuit Interrupter (G
fCI) protects people from electric
shock by detecting leakage and cutting off the AC source.
The AC output of this inverter is available through a NEMA5-20R GfCI Duplex Recepta-
cle (6, fig 6.1a) and also through hardwiring terminal connections located in
a com-
partment (13, fig 6.1a) behind the
GfCI receptacle. The Neutral slot of this receptacle
(longer rectangular slot) and the Neutral Terminal "N" of the Terminal Block for AC out-
put hardwiring (13, fig 6.1b) are internally bonded to the metal chassis of the inverter.
There is a Green indicator light on the GfCI outlet that will be lighted when the GfCI is
operating normally. The light will switch off if the
GfCI is tripped.
The GfCI is provided with the following buttons:
- Reset Button: In case the GfCI is tripped, it can be reset by pressing the “Reset Button”.
NOTE: For the Reset Button to operate, the inverter has to be in ON condition and
should be outputting AC power (no fault
/ shutdown condition).
40 | SAMLEX AMERICA INC.
SECTION 8 |
Installation
Table 8.4 Recommended Sizing of AC Output Wiring and Breaker
Model No.
(1)
Maximum
continuous AC
output current
(2)
Minimum Ampac-
ity of AC output
Line and Neutral
conductors as per
NEC (125% times
Column 2)
(3)
Maximum size
of external AC
output Breaker
(Based on
Column 3)
(4)
Minimum size of
Line and Neutral
conductors based
on Ampacity
at Column 3
(Ampacity based
on conductor tem-
perature of 90°C)
(5)
PST-300 -12
13A
16.25
16A
2.5 mm
2
8.6 GROUNDING TO EARTH OR TO OTHER DESIGNATED GROUND
For safety, ground the metal chassis of the inverter to the Earth Ground or to the other
designated ground (for example, in a mobile RV, the metal frame of the RV is normally
designated as the Negative DC Ground). A chassis Grounding Lug (19, Fig 6.1c) has been
provided for grounding the metal chassis of the inverter to the appropriate ground.
When using the inverter in a building, connect a 2.5 mm
2
insulated
st
e
r
i
w
r
e
p
p
o
c
d
e
d
n
a
r
from the above equipment grounding lug to the Earth Ground connection ( a connection
that connects to the Ground Rod or to buried metallic water pipe or to another connection
that is solidly bonded to the Earth Ground ). The connections must be tight against bare
metal. Use star washers to penetrate paint and corrosion.
When using the inverter in a mobile RV, connect a 2.5 mm
2
insulated
st
e
r
i
w
r
e
p
p
o
c
d
e
d
n
a
r
from the above Chassis Grounding Lug to the Main Grounding Bus Bar of the RV (bonded
to the vehicle chassis). The connections must be tight against bare metal. Use star washers
to penetrate paint and corrosion.
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Summary of Contents for PST-300S-12E
Page 102: ...102 51 OPMERKINGEN 102...
Page 153: ...153 HINWEISE 153...
Page 204: ...204 51 NOTES 204...
Page 255: ...255 51 NOTAS 255...
Page 256: ...256 256 www samlex com www samlex solar com 256...
