Page 203 - Uninterruptible Power Supplies

Batteries
Batteries 201

I (mA)

AVERAGE FLOAT CURRENT
Charge

AVG (f)

0
t (ms)
Float Charge with Low DC ripple current.
Figure 7.17 Float charge with low dc ripple current.

I (mA)

Charge AVERAGE FLOAT CURRENT

AVG (f)

0
Discharge

I (mA)
t (ms)
Float Charge with High DC ripple current.
Figure 7.18 Float charge with high dc ripple current.

cult to provide accurate figures. As a guide a typical 15-min autonomy
at 20°C should provide at least 1000 cycles, this compares with a 1-h
autonomy where, clearly, a deeper discharge occurs and the relevant
figure would be 300 cycles. See Fig. 7.20.

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