
www.pulsar.pl HPSG3
5 Reserve power supply circuit.
PSU is fitted with circuits: charging and battery control whose main task is to monitor state of battery and
connections in its circuit.
If controller detects a power failure in battery circuit, appropriate indication and change of APS technical
output.
5.1 Running PSU on battery backup.
PSU has been fitted with a button on PCB to enable activate battery operation of PSU if required.
Activation of PSU from battery: to do that, press and hold the START button on the unit board for 1 second.
5.2 Deep discharge battery protection UVP.
PSU is fitted with disconnection system and battery discharge indication. During battery operation, lowering
voltage below 10 V +/-0.2 V (20 V±0.2 in 27.6 V version) will disconnect battery within a few seconds.
Batteries are reconnected to power supply unit automatically once ~230 V mains supply is restored.
5.3 Battery test.
The PSU runs dynamic battery test every 5 minutes, temporarily switching the receivers to the battery
operation mode. During testing, the control unit of the PSU measures the electrical parameters according to the
implemented measuring method.
Negative test result will occur as soon as continuity of battery circuit is broken, or if voltage drops below 12 V
or 24 V (depending on version of PSU).
Battery test function will also be automatically blocked if the PSU is in a working mode in which running of the
battery test would not be possible. This condition occurs, for example, during battery operation or when PSU is
overloaded.
5.4 Measurement of resistance of battery circuit.
PSU is checking resistance in battery circuit.
During measurement, PSU driver takes into account key parameters in circuit, and once limit value of 300m ohms is
exceeded for 13,8 V version or 350 mΩ for 27,6 V version, a failure is indicated.
A failure may indicate considerable wear or loose cables connecting batteries.
5.5 Battery operating temperature readings.
Temperature measurement and compensation of battery charging voltage can extend life of batteries.
PSU has a temperature sensor to monitor temperature parameters of installed batteries. Attach sensor to battery,
e.g. with adhesive tape. For the 27.6V version, it is recommended to place sensor between batteries. Be careful not to
damage sensor when moving batteries.
5.6 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.
Output current [A] depending on application PSU
(according to EN50131-6)
Grade 1, 2 - standby
time 12 h
* Grade 3 standby time
30 h
** Grade 3 standby
time 60 h
* if faults of primary source are reported to the ARC alarm receiving centre (in accordance with 9.2 EN50131-6)
** if faults of primary source are not reported to the ARC alarm receiving centre (in accordance with 9.2 EN50131-6)
Depending on a required protection level of the alarm system in the installation place, the PSU efficiency and
the battery charging current should be set as follows:
Output current PSU can be calculated from formula:
IWY=QAKU/T - IZ
where:
QAKU–minimum battery capacity [Ah]
IZ–PSU current consumption (including optional modules) [A] (Table 4)
T–standby time (12, 30 or 60 h)