Page 190 - Uninterruptible Power Supplies

Batteries
188 Chapter Seven

Figure 7.2 Comparison discharge data between tubular-Plante-VRLA cells.

cells are slightly smaller than Plante, and more competitively priced.
They have a life of approximately 14 to 15 years against Plante life of
20 years plus. The cell still requires a separate battery room.
The tubular battery employs a rather different design of positive
plate, this consists of what can best be described as the head of a rake
(Figs. 7.6 and 7.7), the spines and the head of the rake being cast from
a suitable lead-antimony alloy. The spines are surrounded with some
form of semiporous plastic tube and the active material, lead oxide

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