Power Quality riskshave met their match

UST Power protected datacenters increase both reliability and efficiency

Data centers and research institutions depend on ultra-clean power for time-intensive calculations and continuous processing.

Sags, surges, swells, harmonic distortions and a host of

related power anomalies are often overlooked sources of

calculation-destroying errors.

Traditional battery-based uninterruptible power supplies, or UPS backup

systems, are designed to keep computers up during blackouts. They are not

designed to protect against the power “events” that can wreak havoc with

your data in a matter of milliseconds.

The UPS may try valiantly, but wear due to excessive switching, batteries that

fall out of spec, or simple lack of sensitivity will almost inevitably cause it to

fail, right when it’s needed the most.

UST manufactures a full line of industrial-grade power conditioners - electronic

voltage regulators (EVR) with patented microprocessor-controlled tap switch-

ing technology - that offer far more reliable power protection than battery-

based UPS systems.

When you place a UST power conditioner between the grid and your critical

equipment, you can be assured that common electrical anomalies, of any

intensity or duration, will be stopped and corrected within a single cycle.

Data centers deploy large and

expensive battery-based Uninter-

ruptible Power Supply (UPS) systems

to ensure continuous service to a

demanding customer base.

To meet expectations for 100% up-

time, facility managers trade electri-

cal efficiency for the assurance of

knowing that their backup systems

will start the millisecond they are

needed.

However, there is a significant weak-

ness in the legacy design of power-

backup systems at data centers.

Developed before the advent of

modern electronic voltage regula-

tors (EVR), data center UPS systems

are designed to do double duty -

supply backup power in the event of

a blackout, and continuously moni-

tor and condition power.

The typical UPS system is called upon

40 to 60 times a year, but only a

handful of those events are in

response to a total power loss or

deep voltage sag. Up to 90% of the

time, the UPS system is responding

to events that could be more reliably

and economically managed by vol-

tage regulation technologies. This

excessive switching stresses UPS

systems, and exposes data centers to

high incidence of UPS failure.

Within the last decade, UST power

conditioners equipped with elec-

tronic on-load tap changers have

proven capable of reliably and

efficiently compensating for varia-

tions in incoming voltage.

UST power conditioners minimize

and balance variations in voltage to

protect equipment, ensuring

consistent voltage.

UST power conditioners “sense”

even the smallest voltage fluctuation

within a single cycle and adjust elec-

trical output by transforming the

voltage coming in from the grid

before passing it through to the

loads they serve.

When an EVR is placed between the

source and the load, up to 90% of

the electrical events that cause tra-

ditional backup systems to engage

can be safely bridged.

Placing an EVR equipped with a

static switch ahead of the battery-

based UPS system would allow a

data center to remain safely con-

nected to the load while reducing

stress on the UPS.

The EVR is a fully electronic device,

with no moving parts, no significant

maintenance requirements, and a

solid, field-tested record of relia-

bility. It is literally “enabled” upon

installation.

An EVR compensates for voltage

sags, swells and brownouts. It can-

not compensate during periods of

total power loss or blackout.

The UST power conditioners com-

bine the best qualities of typical

mechanical and electronic voltage

regulators while eliminating their

weaknesses.

Mechanical voltage regulators are

valued for their high overload

capacity and good voltage regula-

tion, but these qualities are offset by

their slow correction speed and the

need for regular maintenance of

moving parts. Similarly, electronic

voltage regulators are known for

their fast correction speed, but

suffer from poor overload capacity.

The UST power conditioners provide

high overload capacity for loads

with large inrush-current require-

ments. At the same time, it provides

consistent voltage regulation and

fast correction without regular

maintenance or moving parts.

The inclusion of an EVR in the

powerbackup and power-conditio-

ning system at data centers will lead

to a clear and significant reduction

in data center operating costs of

38% when measured over 10 years

(the typical lifespan of a UPS

backup system).

Payback is guaranteed in less than 3

years. However, factoring in the

likelihood of at least one prevented

UPS outage during the 10-year

lifespan of a system, total savings

will be greater, and payback could

be realized even sooner.

Significant reduction in data center operating costs of 38%

We Save Power performs energy

audits including all aspects of power

quality and EMC.

Based on measurements, we can

translate our knowledge and under-

standing of electrical installations,

electrical equipment and electronics,

motor- and drive-technology into a

clear reporting about the ‘health’ of

your power supply, including advice

for any necessary improvement.

Neither power control and power

quality protection, nor the lack of it,

are without cost. An important part

of assessing power quality related

costs is determining what specifically

is being affected and where, or in

what aspects of business operations,

these costs show up. The benefits of

good power control and power

quality vary from energy savings up

to damage protection. Prevention is

relatively cheap ranging from simple

good practice to the installation of

support equipment.

The UST Electronic Voltage Regulators feature:

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Fast voltage regulation corrects under/over voltage, sags, and swells

High fault-clearing capacity permits reliable operation of other

protective devices

Built-in surge suppression for surges and spikes

Line isolation minimizes transients

Transformer shielding reduces line noise to deliver clean power

Independent phase regulation to correct voltage imbalance

Input circuit breaker protects against damaging over-current and

short circuits

Automatic failsafe electronic bypass keeps the load powered

We Save Power

790 Route d’Annecy

74600 Quintal

France

T +33 457 413 141

E info@wesavepower.com

www.wesavepower.com