Powerware 5140 Features, Unity Power Factor Rating

Powerware 5140 Features

Load Segments

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.

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

Front Panel Display

			LCD Status Screen


			Menu Navigation
			Keys


			Bypass LED
UPS On Battery			Bypass LED


			Alarm LED
Power On (Normal)			Alarm LED


			Alarm Silence/
	On		Self-Test
	On	Off	Self-Test

Extended Battery Modules (EBMs)

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

3U (5.25 inches) of rack space.

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.

Unity Power

Factor Rating

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

0.7power 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:

			Load:	Load:
	Equipment		Watts	VA
(3)		Servers*	3300	3366

(2)		Workstations*	1000	1020

(1)		Color Monitor	200	300

	Total		4500	4686

*Equipment with PFC power supplies.

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.