www.pulsar.pl AWZ222
GREY POWER plus
11
4.3 Dynamic battery test.
The PSU runs a battery test every 10 minutes. It is done by a momentary output voltage reduction and
voltage measurement at the battery terminals. A failure is indicated when voltage drops below ~12,2V. The battery
test function can be turned off.
Deactivating/activating the test:
while mains supply, press the STOP button on the main board and hold it for 3
seconds. The device will confirm the activation/deactivation in the following ways (Tab. 8).
testing off
– 12 sounds
testing on
– 3 sounds
The battery test is performed immediately after switching on with the STOP button.
Caution:
test activation/deactivation is stored in the memory even after unplugging of the device
test deactivation turns off the fault indication at the APS FLT, output. It does not affect the
battery complete
discharge system, though.
4.4 Standby time.
Battery-assisted operating depends on battery capacity, charging level and load current. To maintain an
appropriate standby time, current drawn from the PSU in battery mode should be limited. Characteristics for a
17Ah/12V SLA:
Grade 1, 2 - standby time 12h
Output current 1,1A + 0,9A battery charging current
4.5 Battery charging time.
The PSU has a battery circuit charged with direct current. The current selection is done with use of the
I
BAT
jumpers. The table below shows how long does it take to charge a (fully discharged) battery up to min. 80% of its
nominal capacity.
Table 9. Battery charging time.
17Ah
battery charging time
up to the capacity of 0,8*C
Charging current
[A]
Configuration of
I
BAT
jumper
17h
0,9A
I
BAT
=
(jumper off)
38h 15min
0,4A
I
BAT
=
(jumper on)
5. Service and operation.
5.1 Overvoltage protection of the PSU output OVP.
In case of voltage exceeding 16,5V
at the switching regulator’s output, the system cuts off the
power at the outputs to protect the battery and the receivers from damage. The outputs will be battery-powered.
The activation of the protection system is indicated by the OVP red LED on the PCB board, blinking red FAILURE
led on the front panel of the PSU and alarm buzzer. The status of the PSU FLT technical output is changed.
5.2 Overload or short-circuit the power supply output (SCP activation).
The PSU is equipped with an output protection due to a PTC polymer fuse. If the load of the PSU exceeds
Izn (110% ÷ 150%), the output voltage is automatically cut off and indicated by the FAILURE red diode (Tab. 7).
The load shall be disconnected from the PSU output for approximately 1 minute.
5.3 Maintenance.
Any and all maintenance operations may be performed following the disconnection of the PSU from the
power supply network. The PSU does not require performing any specific maintenance measures, however, in the
case of significant dust rate, its interior is recommended to be cleaned with compressed air. In the case of a fuse
replacement, use a replacement of the same parameters.
