www.pulsar.pl EN54M RED POWER plus
Fig. 12. Mounting of the temperature sensor.
The nominal battery operating temperature recommended by many manufacturers is
25°C. Working at elevated temperatures will significantly shorten the battery lifetime. The service
life is reduced by half for each sustained temperature rise of 8°C above the nominal temperature.
This means that the battery lifespan, when operated at 33°C, can be decreased by 50%!
6.8. 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.
Required, minimum battery capacity to work with the PSU can be calculated with the following formula:
Q
AKU
= 1.25 ﴾ ﴾Id + Iz﴿ •Td + ﴾Ia + Iz﴿ •Ta + 0.05 Ic ﴿
where:
Q
AKU
– The minimum battery capacity [Ah]
1.25 – the factor related to the decrease in battery capacity due to aging
Id – the current drawn by the load during inspection [A]
Iz – PSU current consumption (including optional modules) [A] (Table 4)
Td – required inspection time [h]
Ia – the current drawn by the load during an alarm [A]
Ta – alarm duration [h]
Ic – short-term output current
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