16 | SAMLEX AMERICA INC.
SeCTIOn 4 |
Installation
(ii) condition 2: ac input cord is plugged into Gfci protected ac outlet and Grid voltage is
not available at this outlet (either Grid voltage has shut down or the breaker / switch
feeding this outlet has been switched off):
The Grounding conductor of the AC input
cord (Green wire) is internally connected to the metal chassis of the unit. Hence, the
metal chassis of the unit will also get connected to the earth Ground in the Grid AC
Supply Panel through the above mentioned grounding conductor of the AC input cord.
on detecting loss of Grid AC input voltage, internal Ground Switching relay K2 will be
energised, its Normally Opened (NO) contacts will close and the grounding sockets of
the two NEMA5-15R AC outlets (10, Fig 3.1) will get disconnected from the metal chas
-
sis of the unit and get connected to the internal GfCI circuitry. Hence, the metal chassis
of the AC loads will be protected against leakage through the internal GfCI circuitry in
the Inverter. The internal GfCI circuitry will shut down the AC output of the Inverter if
it detects leakage of > 5.8mA. Under this condition, Green LED “CHARGER” (7, Fig 3.1)
will be OFF and Red LED “FAULT” (9, Fig 3.1) will be ON (Refer to Section 6, Table 6.1)
(iii) condition 3: ac input cord is unplugged from the Gfci protected Grid ac outlet:
on
detecting loss of Grid power, internal Ground Switching relay K2 will be energised,
its Normally Opened (NO) contacts will close and the Grounding Sockets of the two
NEMA5-15R AC outlets (10, Fig 3.1) will get disconnected from the metal chassis of
the unit and get connected to the internal GfCI circuitry. Hence, the metal chassis of
the AC loads powered from the Inverter will be protected from leakage through the
internal GfCI circuitry in the Inverter. The internal GfCI circuitry will shut down the AC
output of the Inverter if it detects leakage of >5.8mA. Under this condition, Green LeD
“CHARGER” (7, Fig 3.1) will be OFF and Red LED “FAULT” (9, Fig 3.1) will be ON (Refer
to Section 6, Table 6.1)
4.5 SWitcHinG of BonDinG of GrounDinG SocKetS of ac outLetS
The following conditions will be applicable when the unit is being used as (i) a Stand-alone
Inverter (AC power cord is
NoT
plugged into the Grid power) or as (ii) a backup AC power
source (AC UPS) with the AC power cord plugged into the Grid outlet but Grid power OFF:
• Internal Ground Switching Relay K2 will be in energized condition. Its Normally Opened
(NO) contacts will be closed and the Grounding Sockets of the two NEMA5-15R AC
outlets (10, Fig 3.1) will get disconnected from the metal chassis of the unit and get
connected to the internal GfCI circuitry. The Line and Neutral Sockets of the NeMA5-15r
AC outlets on the unit will be isolated from its Grounding Socket. Thus, the metal chassis
of the AC loads and the metal chassis of the unit will also be isolated from the Line and
Neutral sockets of the NeMA5-15r AC outlets.
• Due to the above implementation, the voltage on the Neutral and Line Sockets of
the NeMA5-15r AC outlets with respect to the Grounding Socket will be a pulsing DC
voltage with average DC value of up to 50V (will falsely read 75 VAC on AC scale of the
Voltmeter because of the pulsing nature of DC voltage). Do NoT ToUCH THe NeUTrAL
SoCKeTS / NeUTrAL CoNDUCTorS of THe AC oUTLeTS!
Summary of Contents for SAM Series
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