Engl
ish
Appendix F: Emergency power supply battery capacity
47
Slow whoop & pre-recorded message:
Compensation for effective duration of slow whoop (C
sw
): 0.875 (0.5s OFF + 3.5s ON = 87.5%)
Compensation for effective duration of pre-recorded message (C
mes
): 0.8 (2s OFF + 8s ON = 80%)
Total time emergency signal: 28s
Time slow whoop (T
sw
) versus total: 8/28s
Time pre-recorded message (T
mes
) versus total: 20/28s
Abbreviations and variables:
Battery aging factor = AF
Load factor = LF (connected load to amplifier versus maximum load)
Standby/Idle time = T
idle
Max. power time = T
max
Energy save mode ON time = E
on
Energy save mode OFF time = E
off
Battery capacity (general):
Total capacity (Ah) = AF * [(T
idle
* (I
idle
)) + (T
max
* (I
max
))]
Battery capacity – Slow whoop only:
Total capacity (Ah) = AF * [(T
idle
* I
idle
) + (T
max
* I
idle
) + (T
max
* ((((I
sw
– I
idle
) * LF) + I
idle(PA)
) * C
sw
))]
Battery capacity – Slow whoop only, including Energy save mode:
Total capacity (Ah) = AF * [(T
idle
* I
idle
) + (T
max
* I
idle
) + (T
max
* I
esm
* E
off
)
+ (T
max
* ((((I
sw
– I
idle
) * LF) + I
idle
) * C
sw
) * E
on
)]
Battery capacity – Slow whoop & pre-recorded message:
Total capacity (Ah) = AF * [(T
idle
* I
idle
) + (T
max
* I
idle
)
+ (T
max
* ((((I
sw
– I
idle
) * LF) + I
idle
) * C
sw
) * T
sw
)
+ (T
max
* ((((I
mes
– I
idle
) * LF) + I
idle
) * C
mes
) * T
mes
)]
Battery capacity – Slow whoop & pre-recorded message, including energy save mode:
Total capacity (Ah) = AF * [(T
idle
* I
idle
) + (T
max
* I
idle
) + (T
max
* I
esm
* E
off
)
+ ((T
max
* ((((I
sw
– I
idle
) * LF) + I
idle
) * C
sw
) * T
sw
) * E
on
)
+ ((T
max
* ((((I
mes
– I
idle
) * LF) + I
idle
) * C
mes
) * T
mes
) * E
on
)]