Samlexpower PST-300-12 Manuel Du Propriétaire page 36

Section 8 |
8.5.2 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 (GfCI) 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. The Neutral slot of this receptacle (longer rectangular slot) is internally bonded to
the metal chassis of the inverter.
There is a Green indicator light 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 to the internal Line Side of the GfCI (no fault / shut
down condition).
- Test Button: This button is used to test if the GfCI is operating normally. Test the GfCI
periodically to ensure that it is operating normally.
The GfCI will trip due to the following conditions:
- Leakage or ground fault (Leakage of 5 to 6 mA)
- Neutral to Ground bonding (connection) on the load side of the GfCI
!
CAUTION!
Do not feed the output from the GfCI receptacle to a Breaker Panel / Load
Center where the Neutral is bonded to the Earth Ground. This will trip the GfCI.
8.5.3 Providing Backup AC Power Using Transfer Switch
for this application, use a Transfer Switch that has Double Pole, Double Throw Contacts
like in Samlex America, Inc. Transfer Switch Model No. STS-30. This type of Transfer
Switch will be able to switch both the Hot and the Neutral and will prevent tripping of
the GfCI due to Neutral to Ground bond in the Utility power:
- feed utility power and output power from the inverter to the two inputs of the Trans-
fer Relay
- feed the output of the Transfer Switch to a Sub-Panel to feed AC loads requiring
backup power
36 | SAMLEX AMERICA INC.
installation