APC PX - Definitions; Important Information

DefinitionsDefinitions
DefinitionsDefinitions
Definitions
The following terms are used in this manual. Review these
definitions for a better understanding of the Symmetra
TM
:
Redundancy - Indicates the presence of one or more extra
power modules which allow the system to sustain a fault and
still provide protection to the load. To be fully redundant, the
system should be configured with a redundant intelligence
module, and at least one redundant power module.
Note: The number of battery modules determines the length of
the run time. While it is prudent to use the maximum number
of battery modules possible, they are not considered redundant.
N+1 Redundancy - Refers to the level of power module re-
dundancy. N represents the number of power modules re-
quired to power the load, and +1, +2, etc. represents the
number of extra power modules that are present.
For example, a 7.3 kVA load requires two power modules for
adequate protection. If the Symmetra
TM
is configured with
only two modules, it has an N+0, level of redundancy. (No
redundancy). If the system is configured with three power
modules, it has an N+1 redundancy. Depending on the size
of the load, Symmetra
TM
can be configured with 2, 3 or even 4
extra power modules. Respectively, it would have an N+2,
N+3, or N+4 level of redundancy.
Capacity - The maximum amount of output power that a
Symmetra
TM
system can deliver. The capacity is limited by the
lesser of the frame size, or the capacity of the installed power
modules.
For example, a MiniFrame (8kVA) with one power module
installed (4kVA) has a system capacity of 4kVA. A MasterFrame
(16kVA) with five power modules (20kVA) has a system ca-
pacity of 16kVA.
Hot-swappable - The modules are hot-swappable means
they can be replaced safely by a user or service provider while
the load is still powered and fully protected.
Important InformationImportant Information
Important InformationImportant Information
Important Information
Please read this User's Manual thoroughly before proceeding
with the installation of the Symmetra
TM
Power Array system.
It provides important information about installing and using
the Symmetra
TM
safely and effectively. Pay close attention to
text that is accompanied by a danger, or caution symbol. For
technical support, see the inside front cover of this manual.
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