Protections - Samlexpower SEC-1260A Owner's Manual

PROTECTIONS

The charger has the following protections:
SHORT CIRCUIT SHUT DOWN
In case of a short circuit on the output side, the output of the charger will be shut down. The
Charging Indication LED (4) on the front panel will turn red (On the Remote Panel (15), the
red LED "I Phase" will light, the green LED "Power" will, however, remain lighted). The
charger will be latched in this shut down condition and will NOT recover automatically even
after the short circuit condition is removed. To reset, the AC input power on / off switch (9)
at the back of the unit has to be switched off and on again.
OVER LOAD CURRENT LIMITING
The current drawn by the load is automatically limited to a maximum of 60 A for SEC-1260A
(30 A +/- 1 A in "Half Power Mode"), 80 A for SEC-1280A (40 A +/- 1 A in "Half Power
Mode") and 40 A for SEC-2440A (20 A +/- 1 A when in "Half Power Mode"). If the load
tries to draw a higher current than these limits, the output voltage of the unit will start to
drop. The unit will automatically recover when the overload condition is removed.
REVERSE BATTERY CONNECTION CUT OFF
The output is internally fused on the DC side – 2 x 35 A fuses for SEC-1260A, 3 x 30 A fuses
for SEC-1280A and 3 X 15 A fuses for SEC-2440A. In case, the polarity of the battery
connection is reversed, the fuse(s) will blow. The Charging Indication LED (4) on the front
panel will turn red (On the Remote Panel (15), the red LED "I Phase" will light, the green
LED "Power" will, however, remain lighted). The fuse(s) will be required to be replaced for
the unit to function again.
THERMAL OVERLOAD SHUTDOWN
CAUTION! Keep the charger in a well ventilated, cool and open area. Do not block the vent
holes on the sides or the discharge openings of the cooling fan.
In case the fan fails or if the
cooling is not adequate due to higher ambient temperature, inadequate air circulation or blockage
of air ventilation openings, the thermal sensor for over-temperature protection will shut down
the output voltage of the charger. The Charging Indication LED (4) on the front panel will turn
red (On the Remote Panel (15), the red LED "I Phase" will light, the green LED "Power" will,
however, remain lighted). The charger will be latched in this shut down condition and will NOT
reset automatically even after the unit has cooled down. To reset, the AC input power on / off
(9) switch at the back of the unit has to be switched off and on again.
PROTECTION AGAINST TRANSIENTS / SURGES IN THE AC INPUT
In a number of locations, the AC line input is not clean and may contain high voltage
transients / surges. To prevent damage to the internal components against these unwanted
high voltages, the charger uses a MOV (Metal Oxide Varistor) for protection. If surge /
transient voltage higher than approximately 170 VAC (for 120 VAC input) or 270 VAC (for
230 VAC input) appear in the AC input, the MOV will conduct and will blow the AC side
fuse.
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