Section 8: Operation; Switching On/Off - SamplexPower SEC-1250UL Guide D'utilisation

SECTION 7 |
An optional wired Remote Control Panel Model No. 900-RC (Fig 7.4 above) can be or-
dered. It comes with 10 meters of RJ-45, 8P8C Modular, Straight cable. It is plugged into
the Remote Control Jack (6 in Fig 3). The Remote Control Panel can be used to switch
ON / switch OFF the charger and also monitor the charging status of the charger from a
remote location. Please read the manual for the optional Remote Control Panel 900-RC
for related indications.
SECTION 8 |
!
CAUTION!
Negative Temperature Coefficient (NTC) thermistors are used in series with the
AC input circuit to limit very large spike of inrush current drawn by input side
capacitors, which act almost like a short circuit during the first half cycle after
the charger is switched ON. When charger is switched ON, NTC is in cold state,
its resistance is high and hence, the inrush current spike is suppressed to safe
level. It heats up very fast and its resistance drops to almost zero. It remains
in heated condition as long as the charger remains switched ON. When the
charger is switched OFF, the NTC requires around 2 to 3 min to cool down and
reset its resistance to high cold state value for spike suppression the next time it
is needed. The following precautions are to be taken to prevent damage to the
NTC and to the input circuit:
• Do not switch ON, switch OFF and Switch ON the charger in quick succession.
After switching OFF the charger, wait for at least 5 minutes before switching
ON again to allow cooling down of the NTC
• When powering the charger from a generator, allow the generator to warm
up and stabilize in voltage before switching ON the charger. If the charger is in
ON condition and the generator is started, high voltage transients produced by
the generator during startup may damage the NTC
8.1 SWITCHING ON / OFF
The charger is switched ON / OFF with the illuminated AC input power ON / OFF switch
(9 in Fig 3) located on the rear panel of the unit. The switch is illuminated Red when
switched ON.
8.2 INDICATION OF NORMAL OPERATION AND CHARGING STATUS
When the charger is switched ON without any load, the fan will come on momentarily
and switch OFF. Voltmeter (12 in Fig 3) will indicate the voltage at the terminals of the
charger. Ammeter (13 in Fig 3) will indicate the current being drawn from the charger.
When a stand-alone battery (there is no load on the battery) has charged fully and the
Preparing the Charger for Operation
Operation
SAMLEX AMERICA INC. | 27