Dale Power Solutions Ltd
User Manual
10
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Battery temperature compensation
Using optional external battery temperature sensors the UPS is capable of optimising the battery charger
output to enhance battery life and performance. This is a non-standard feature that must be purchased
separately. Contact your distributor for details.
Redundant control power supply board
The UPS is equipped with two identical and fully redundant control power supply boards. Each board is
powered by the input a.c. and battery d.c. Therefore, if one of these sources or even if a board fails the
UPS continues to operate normally. This feature further enhances the reliability of the system.
Single phase outlet
A 250 Va.c. 5 A single-phase fused outlet is provided on the front panel. This supply is generated from
the battery, independent of other UPS power circuits, and can be used for ease of testing, commissioning,
and servicing. This output is accessible when the cabinet door is open.
Multi-unit operation
Up to four units can be operated in N+X parallel mode to provide additional power or higher reliability. In
this configuration the load is shared equally between the units.
It is also possible to operate with load bus synchronisation (LBS), which allows the load to be transferred
seamlessly between two UPS systems. Each system can be a single UPS or a parallel group of units.
Multi-unit operation is enabled by:
■ Hardware and firmware built into each UPS, controlled by software settings.
■ Parallel control cables, connected in a ring to enhance reliability. Dual-bus control cables are
connected between any two UPS modules of each bus. The intelligent paralleling logic provides the
user with maximum flexibility. For example, shutting down or starting up UPS units in a parallel
system can be done in any sequence. Transfers between
Normal
and
Bypass
modes of operation
are synchronised and self-recovering.
The total load of a multi-
unit system can be queried from each unit’s LCD display.
