Samlexpower PST-15S-12E Owner's manual - Section 10 |
44 | SAMLEX AMERICA INC.
SAMLEX AMERICA INC. | 45
The AC output voltage will shut down due to overload and short circuit conditions as follows:
Power Surge condition: When the AC output current tries to exceed around 200% of
the rated value, 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
200% will, thus, be provided for
to 2.5 sec overload Condition is activated.
overload condition: If there is a continuous overload of 110% to 115% for 2 to 2.5 sec,
the output voltage will be shut down. Red LED marked “OVERLOAD” (3, fig 6.1a) will
turn ON and buzzer alarm will sound. The Green LED marked “POWER” (2, fig 6.1a)
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 3-Postion Rocker Switch
“ON/Off/EXT. Switch”, 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
voltage will be shut down thereafter.
Red LED marked “OVERLOAD” (3, fig 6.1a) will turn ON and buzzer alarm will sound.
The Green LED marked “POWER” (2, fig 6.1a) 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 3-Postion Rocker Switch “ON/Off/EXT. Switch”, wait for 3 minutes
and then switch oN the unit again. before switching oN, determine and remove the
cause of overloading.
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-300S-12E or, to 21.4V ± 0.2V or lower for PST-300S-24E, a buzzer alarm will be
sounded. The Green LED marked "POWER" (2, fig 6.1a) 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-300S-12E or 20V ± 0.2V or lower for PST-300S-24E.
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-300S-12E
or 20V ± 0.2V or lower for PST-300S-24E, the AC output is shut down. Buzzer alarm is
sounded. The Green LED marked "POWER" (2, fig 6.1a) will remain lighted.