Section 10 Protections - Samlex Power PST-600-12 Manuel Du Propriétaire

Section 10 | Protections
Power Surge Condition: When the AC output current tries to exceed around 166% of
the rated output current for PST-600 or, 200% of the rated output current for PST-1000,
output current limiting is carried out instantly resulting in drop in the AC output voltage
(the drop is proportional to the load impedance). Surge Power of 166% for PST-600 and
200% for PST-1000 will, thus, be provided for < 8 ms every half cycle. If this situation
continues for 2 to 2.5 sec, Overload Condition is activated.
Overload Condition: If there is a continuous overload of 110% to 115% for 2 to 3 sec, the
output voltage will be shut down. Red LED marked "OVERLOAD" (3, Fig 6.1) will turn ON,
the Green indication light on the GFCI outlet will be OFF and buzzer alarm will sound.
The Green LED marked "POWER" (2, Fig 6.1) will continue to be lighted. The unit will be
latched in this shut down condition and will require manual reset. To reset, switch Off the
unit using the ON/OFF Switch (1, Fig 6.1), wait for 3 minutes and then switch ON the unit
again. Before switching ON, determine and remove the cause of overloading.
Short Circuit Condition: Short circuit condition will be detected when the AC output
voltage drops to 80VAC or lower over a period of up to 2.5 sec. The AC output voltage
will be shut down thereafter.
Red LED marked "OVERLOAD" (3, Fig 6.1) will turn ON, the Green indication light
on the GFCI outlet will be OFF and buzzer alarm will sound. The Green LED marked
"POWER" (2, fig 6.1) will continue to be lighted. The unit will be latched in this shut
down condition and will require manual reset. To reset, switch Off the unit using the
ON/OFF Switch (1, Fig 6.1), wait for 3 minutes and then switch ON the unit again. Before
switching ON, determine and remove the cause of short circuit.
10.2 WARNING ALARM - LOW DC INPUT VOLTAGE
The voltage at the DC input terminals will be lower than the voltage at the battery ter-
minals due to voltage drop in the battery wires and connectors. The drop in the voltage
at the DC input terminals of the inverter could be due to lower battery voltage or due
to abnormally high drop in the battery wires if the wires are not thick enough (Please
see Section 8.4.3 "Connection from Batteries to the DC Input Side – Sizing of Cables and
Fuses"). If the voltage at the DC input terminals drops to 10.7V ± 0.1V or lower for PST-
600-12 / PST-1000-12 or to 21.4V ± 0.2V or lower for PST-600-24 / PST-1000-24, a buzzer
alarm will be sounded. The Green LED marked "POWER" (2, Fig 6.1) and indication light
on the GFCI will continue to be lighted and the AC output voltage would continue to be
available. This warning buzzer alarm indicates that the battery is running low and that
the inverter will be shut down after sometime if the voltage at the inverter terminals
further drops to 10V ± 0.1V or lower for PST-600-12 / PST-1000-12 or, to 20V ± 0.2V or
lower for PST-600-24 / PST-1000-24.
10.3 LOW DC INPUT VOLTAGE SHUT DOWN
If the voltage at the DC input terminals drops to 10V ± 0.1V or lower for PST-600-12 /
PST-1000-12 or to 20V ± 0.2V or lower for PST-600-24 / PST-1000-24, the AC output is shut
down. Buzzer alarm is sounded. The Green LED marked "POWER" (2, fig 6.1) will remain
lighted. The Green indication light on the GFCI will be OFF.
42 | SAMLEX AMERICA INC.