Nautel NAB05E, Технические инструкции

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48 VOLT BATTERY CHARGER
NAB05E
Page 4-1
01 September 2004
SECTION 4
OPERATING INSTRUCTIONS
GENERAL
4.1
This section provides the information required
to place the battery charger into operation. The
following instructions are primarily intended for
persons involved in testing or maintenance of the
equipment.
EMERGENCY SHUTDOWN PROCEDURE
4.2
There are no special precautions to be taken if
an emergency shutdown is required. Switch off ac
power by placing
POWER
switch S1 in the
OFF
position or turn off ac power source at the supply
panel.
PERSONNEL SAFETY
4.3
Exercise caution when working in the vicinity
of uninsulated termination points of wires carrying the
ac power source voltage.
CONTROLS AND INDICATORS
4.4 The controls and indicators of the battery
charger are straight forward. The following is a brief
description of their function:
--
POWER
switch S1 applies the ac power to the
battery charger when it is set to
ON
and removes the
ac power source when set to
OFF
.
- Light emitting diode DS1 turns on when ac power
is being applied to the battery charger and
POWER
switch S1 is
ON .
- Potentiometer A1R18 provides a calibration
adjustment to set the constant charging current to
the desired level (maximum of 3.0 amperes).
- Potentiometer A1R24 provides a calibration adjust-
ment to set the charge current switch-off voltage
(voltage that represents the full charge voltage of
the batteries being charged).
TURNING ON THE BATTERY CHARGER
4.5
There are no special turn-on procedures.
Verify the requirements of paragraph 3.8 have been
satisfactorily completed and observe the precautions
specified in paragraph 4.6.
OPERATING PRECAUTIONS
4.6
Severe damage to the batteries can result if
they are connected improperly. Observe all
precautions specified by the battery manufacturer,
paying particular attention to the following:
(a) When a number of batteries are to be connected
in series, ensure the fully charged voltage of the
series string is within the charging range of the
battery charger.
(b) If batteries are connected in a series parallel
arrangement, ensure the fully charged voltage of
each series string is identical.
(c) The polarity of all batteries should be checked
with a meter before connecting them in series.
(d) Check polarity of the voltage on the inter-
connecting wires, at the battery charger end,
before making the final connection to the battery
charger. Ensure the battery negative is
connected to the battery charger negative.
(e) If the batteries are being subjected to their initial
charge or if they are fully discharged, observe
any recommendations specified by the battery
manufacturer.
(f) If possible, it is recommended that all batteries
be near the same charge/discharge state when
they are initially connected to the battery
charger. The current required to charge a
battery that is discharged more than the other
batteries in a series string will flow through all
of the batteries and may cause excessive boiling
off of the electrolyte in the batteries that were
originally closer to being fully charged.