Powerware 5140 User Manual

What does unity power factor rating mean?

Quite simply, it means that the watt rating of the

UPS is equal to its VA rating.  Traditionally,

UPSs have been designed, built, and sold with a

power factor rating of approximately 0.6 to 0.7.

For example, a 1000 VA UPS could supply a

maximum of 600 to 700 watts.  Historically, this

0.7 power factor was appropriate for the

majority of computer loads the UPS was

intended to support since most computers

demanded power at a 0.7 power factor.

Today, however, a large percentage of high-end

computers, utilize Power Factor Corrected

(PFC) power supplies, which have a power

factor of approximately 1.0.  Take a look at the

configuration below:

To support this load, you need to select a 

UPS with a rating that meets or exceeds both

the watt and VA demand shown above.  

A traditionally rated 5000 VA/3750 watt UPS

without a unity power factor rating cannot be

used.  The Powerware 5140, on the other 

hand, has capacity to spare.

Load Segments are groups of receptacles that can be independently controlled via the front

panel LCD interface and/or LanSafe III/FailSafe III, which is bundled with the Powerware

5140.  Load Segments provide extended battery run times and flexible management of the

UPS. The five Load Segments of model PW5140 6000i are outlined below.

To extend battery backup times, you can connect up to two EBMs.  Each EBM occupies

3U (5.25 inches) of rack space.

Load Segments divide the
Powerware 5140 into five
virtual UPSs

Shut down Load Segments
to decrease load and
extend backup time for
other Load Segments

Reboot a locked up server
by turning a Load Segment
off and on

LCD Status Screen

Menu Navigation
Keys

Bypass LED

Alarm LED

UPS On Battery

Power On (Normal)

On

Off

Alarm Silence/
Self-Test

You can hot-swap both the
standard batteries and EBMs
without powering down the
connected load.  This makes it
possible to extend the life of
the UPS without returning the
unit for service.

(3) Servers*

3300

3366

(2) Workstations*

1000

1020

(1) Color Monitor

200

300

Total

4500

4686