Introduction; Safety Warnings - Eaton 9PXM User Manual

Chapter 1

Introduction

The Eaton
power control modules (referred to as power modules). These modules plug into a rack cabinet structure
containing additional control, communication and display functions that enable integrated control of all power
modules. The UPS is housed in a single cabinet with either eight or twelve slots which may be either floor or
rack-mounted. Optional extra battery capacity is housed in extended battery module (EBM) cabinets.
The twelve-slot UPS cabinet can accommodate a maximum of six power modules and six battery strings in the
remaining six slots. However, if a customer chooses to only have one power module they can install eleven
battery strings in the remaining eleven slots. The eight-slot cabinet can accommodate the same configuration
with two less total units each. Both UPS cabinet models allow their output to be limited such that an excess
number of power modules allow the failure of one or more modules without causing the UPS to lose any
functionality. Optional super charger modules can be installed in the power module slots.
The power modules can be removed and replaced (easily replaceable) without powering the UPS down if the
UPS has sufficient redundant capacity. Battery packs (2 battery packs = 1 battery string) may also be easily
replaced for maintenance. Power control circuitry in the cabinet senses problems in power modules, and
automatically transfers control and load to the remaining power modules. Battery packs and Power modules are
accessed through removable front panels.
All power modules share the load requirements equally. For example, three power modules are capable of
supplying a total of 12 kVA. If a load requires only 6 kVA, each power module supplies 2 kVA to the output.
If one power module is removed or for some reason fails, each of the two remaining power modules would
supply half of the load, or 3 kVA. In other words, redundancy exists when the load can be supplied by less than
all of the installed power modules.
To permit UPS removal from the power path while maintaining power to the loads, an external bypass switch
is required. This switch is optional but recommended for system serviceability.

Safety Warnings

This manual contains important instructions that you should follow during installation and
maintenance of the UPS and batteries. Please read all instructions before operating the equipment
and save this manual for future reference.
The 9PXM is a modular UPS with a power range of 4kVA to 20kVA. Each Power Module is rated
l
for up to 4kVA. The 20kVA (N+1) Split-Phase model chassis will have twelve slots, two per row.
All of the twelve slots can accommodate battery strings. The Power Modules will be restricted
to the slots in only the left side of the chassis, when viewed from the front. A super charger can
be installed in any of the power module slots. This super charger can also be used in an external
battery module (EBM). The 16kVA (12kVA (N+1)) Models will be similar but will have eight slots.
Do NOT install more than six power and/or optional super charger modules in the system.
l
Battery packs to be used in the Eaton 9PXM system are model P-103002954. Each battery pack
l
weighs 15 kg (33 lb). Use care in lifting and moving battery packs.
All input and output wiring must be copper and adequate to carrying currents as listed in Table 9
l
on page 87.
Torque all bolts holding input and output power conductors to values specified in Table 2 on
l
page 16.
The user is required to provide power input and output disconnect devices for the UPS. These
l
must be within sight of the UPS and easily accessible.
®
9PXM uninterruptible power system (UPS) is a modular UPS that contains battery strings and
IMPORTANT SAFETY INSTRUCTIONS — SAVE THESE INSTRUCTIONS
Eaton 9PXM UPS (4-20 kVA) User's Guide P-164000669—Rev 05 1