Reliable, Economical Back-Up Power for Critical Loads

S&C PureWave UPS ™ System313 to 2500 kVA—208 to 600 Volts

2

Sensitive Electronic Equipment Can’t Tolerate Power Quality DisturbancesData centers aren’t the only facilities susceptible to power quality problems. Today, more and more sensitive electronic equipment is being used in automated manufacturing plants, continuous process industries, healthcare facilities, and laboratories. Users everywhere are being confronted with a proliferation of loads which cannot tolerate power quality disturbances such as voltage sags and swells, momentary interruptions, and frequency excursions.

To make matters worse, with the decreasing size and increasing capabilities of this equipment, the density of such equipment has grown dramatically in affected facilities, greatly increasing the cost of power. The air conditioning system for this equipment must now be considered part of the critical load.

S&C’s PureWave UPS™ System Is the Best Answer With their low operating efficiencies, air conditioning requirements, and battery maintenance needs, conventional UPS systems are costly to own and operate. And conventional systems require lots of valuable indoor space for their power modules, switchgear, batteries, and air conditioning units.

S&C has a better solution . . . the energy-efficient PureWave UPS System. It’s a self-contained, modular, low-voltage uninterruptible power supply system that can be applied indoors or outdoors without modification. It provides 60 seconds of protection at full load.

In case you’re wondering whether 60 seconds of power protection is adequate . . .

The scatter plot below illustrates the results of a nationwide EPRI study on distribution-system voltage disturbances. This study showed that 98% of disturbances are attributable to voltage sags and momentary interruptions lasting 16 seconds or less.

The 60 seconds of protection provided by the PureWave UPS System protects sensitive loads from 99% of all power quality disturbances. In many cases, a back-up generator may not be required.

CBEMA Magnitude—Duration Scatter Plot175

150

125

100

75

50

25

0

Total Events: 5445Events Below: 5365Events Above: 80Below CBEMA: 2267Above CBEMA: 79

10-1c1.6 ms

10-0c16 ms

10-1c160 ms

10-2c1.66 s

10-3c16.6 s

10-4c166 s

Duration of Disturbance in 60-Hertz Cycles (c) and Seconds (s)

Per

cent

of N

omin

al V

olta

ge (R

MS

or

Pea

k E

quiv

alen

t)

Results of EPRI study on distribution-system voltage disturbances. (EPRI Commissioned Report RP 3098-1.)

3

What the PureWave UPS System Can Do for YouThe PureWave UPS System has been applied around the world, providing facility-wide protection from power disturbances that can otherwise cause devastating financial losses.

Here are the ways in which a PureWave UPS System can improve the productivity and service levels of your operation:

Data Centers• Higher energy efficiency

• Lower energy costs

• Protects air conditioner and chiller loads

• Can be installed outdoors to conserve raised indoor floor space

• Reduces battery maintenance expense

• Easily expands to accommodate future load growth

• Promotes objectives of The Green Grid™ through increased energy efficiency

• Reduces “carbon footprint” . . . the emission of CO2 and other greenhouse gases

Hospitals/Healthcare• Improves patient service

• Provides backup for small downstream UPSs

• Eliminates blackout during transfer to emergency generator

• Facilitates routine generator testing

• Extends protected power to non-emergency circuits

• Installs outdoors, saving valuable interior space

Continuous Process Manufacturing• Increases/extends plant capacity, delaying need to

invest in additional production equipment

• Improves quality and reduces scrap

• Ensures “just-in-time” deliveries

• Improves operating efficiency

Pharmaceutical Manufacturing• Maintains product quality

• Maintains regulatory compliance

• Reduces product scrap

• Increases effective capacity

Semiconductor Fabrication• Increases plant yield

• Reduces scrap

• Increases capacity

• Ensures “just-in-time” deliveries and enhances ability to meet customer commitments

• Saves interior floor space

4

The PureWave UPS System Offers Unique Benefits • Mostenergy-efficientsystemintheindustry.

The PureWave UPS System consumes less power, creates less building heat, and presents a smaller carbon footprint than conventional UPSs, resulting in real savings.

• Noneedtouseupvaluableair-conditionedindoorspace. The PureWave UPS System features a NEMA 3R enclosure that can be installed indoors or outdoors without modification. By placing the system outdoors, the cost of a separate, dedicated battery room is eliminated, providing the lowest installed cost of any UPS system.

• Readilyexpandable. The PureWave UPS System is available in capacities from 313 kVA/250 kW to 2500 kVA/2000 kW. Just purchase the number of battery and inverter modules required for your present critical load. Additional modules can be added as the critical load grows, up to the rating of the system.

• Batteriesaren’texposedtotheharmfuleffectofdcripple. Unlike conventional battery-based UPS systems, in the PureWave UPS System the batteries are maintained in a true open-circuit state, enhancing their operating life.

• Minimalmaintenancerequirements.Just replace the batteries every five years. The integral automatic bypass feature makes maintenance easy.

• Industry’sstrongestwarranty. The PureWave UPS System includes an unsurpassed five-year non-prorated warranty on the battery string.

Big Savings in Energy CostThe PureWave UPS System offers the highest efficiency of any system available: 98.5%, including air conditioning. It’s the least costly system to operate. Compared to a 92%-efficient conventional UPS system, a PureWave UPS System serving an 1800-kW load will save over $90,000 per year in energy costs, based on a rate of $.08/kWHr.

But conventional UPSs are typically run at lower capacity levels, leading to efficiencies less than 92% . . . so a PureWave UPS System saves even more money in comparison.

100.0

96.0

92.0

88.0

84.0

80.00 20 40 60 80 100

LOAD, %

EF

FIC

IEN

CY,

%

PUREWAVE

Operating efficiencies of various UPS technologies, including cooling losses.

5

Outdoor Installation Is a Big PlusConventional battery-based UPS systems take up a good deal of space because of the large number of wet-cell batteries they use. The battery banks require a separate, dedicated room with special attention to ventilation, the possibility of corrosive effects, and temperature monitoring. A costly addition to the facilities must often be constructed.

Conventional battery-based UPS systems also generate substantial heat, so additional space must be allocated for dedicated, redundant air conditioning units.

The PureWave UPS System, on the other hand, can be installed outdoors on a pad, as shown below. Valuable floor space isn’t needed.

1250-kVA/1000-kW PureWave UPS System installed outdoors, adjacent to service entrance point.

6

Truly Maintenance-Free BatteriesThe PureWave UPS System utilizes up to eight battery and inverter modules, as determined by the size of the critical load. Additional modules can be added at any time, as the load grows.

Unlike conventional battery-based UPS systems, in the PureWave UPS System the batteries aren’t continuously connected to the dc bus. The batteries thus do not experience dc ripple current, which creates heat that degrades performance. The batteries are automatically recharged, equalize-charged, and continuously monitored to ensure system availability. The unique PureWave battery management system takes energy storage to its highest level of reliability in the industry.

The PureWave UPS System is the only three-phase UPS system designed completely around the performance parameters of the batteries. The factory-sealed batteries don’t require topping off with electrolyte, or any other maintenance.

The PureWave UPS System is also the only UPS system with a five-year/625-megajoule non-prorated battery warranty. In a typical application, that translates to over 1,000 power disturbances in 5 years. Replacement of the battery strings is recommended in the sixth year.

PureWave UPS System battery module and inverter module.

Seamless Generator Connection, Reduced Generator SizingThe PureWave UPS System allows critical-load users to plan for seamless protection from extended power outages. Ride-through time can be tailored to permit start-up of a new or existing back-up generator. Transfers to and from the back-up generator are “covered” by the PureWave UPS System.

In applications using conventional UPSs, the back-up generator must be oversized to accommodate the on-line inefficiencies . . . typically 140% of the protected load. But with its off-line design, the PureWave UPS System presents a very small load profile to the generator. The generator can be sized at only 100% to 105% of the protected load . . . saving on both initial cost and ongoing operating cost.

Lowest Total Cost of OwnershipWhen installed outdoors, the PureWave UPS System eliminates the substantial expenses associated with modification to the building’s interior, including construction of dedicated battery rooms.

And after installation, the higher efficiency and lesser maintenance requirements of the PureWave UPS System reduce ongoing energy usage and provide faster return on investment.

7

How It WorksShown below is a typical single-line diagram of a PureWave UPS System applied with a back-up generator.

During normal operation, the load is powered by the utility source through the normally closed PureWave Power-Electronic Switch.

Voltage is continuously monitored on all three phases of the source. If the utility disturbance monitor senses a disturbance exceeding 610% of nominal voltage, it sends an “open” signal to the power-electronic switch, coincident with a “run” signal to the inverter module(s). Load is transferred to the stored-energy source—typically in two to four milliseconds . . . fast enough for computers and other sensitive electronic devices to ride through.

Upon detection of an extended power outage, the PureWave UPS System provides “soft” load transfer to the back-up generator. This feature allows users to take advantage of lower interruptible service rates available from most electric utilities.

The PureWave UPS System provides seamless transfer between the utility source and the back-up generator without the need for costly utility paralleling switchgear. And the generator can be sized up to 35% smaller than with conventional UPS systems.

When utility source voltage returns to its normal limits, the PureWave UPS System synchronizes output voltage with that of the utility source, and sends a “close” signal to the power-electronic switch along with a “stop” signal to the inverter module(s). After a few seconds, the battery chargers turn on to restore the batteries to 100% capacity.

Single-line diagram of PureWave UPS System applied with back-up generator.

B a tte ry

Transferswitch

Utility Input

Bypass

Back-up generator

PureWave UPS SystemCritical load

Diesel or natural gas engine

ACgen

Control

Systemcontrol

Batterymodule

ACinverter

Batterycharger AC

caps Isolationtransformer

Input

PES

Output

Up to eight batteryand inverter modules

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Easy-to-Use Monitoring SystemThe Windows®-based PureWave monitoring software is simple to set up and run. At your remote location, the graphical interface gives you real-time system status information, the status of each inverter

module, power outage data, load voltage and current, power factor, and a variety of alarm indicators. Remote alarm monitoring is available too. Real time status information is also available via Modbus/TCP server.

PureWave monitoring system status screen.

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Evaluating Your NeedsEvery distribution system is different and power quality requirements vary widely. A comprehensive assessment of equipment cost and payback is essential.

S&C can help by providing power quality measurements, application studies, short-circuit and coordination studies, and load-flow and voltage-regulation studies. And we can also help in

determining the UPS solution best suited for your application: a single PureWave UPS System serving the entire facilities . . . or distributed PureWave UPS Systems.

S&C offers turnkey installation, project management, preventive maintenance, training, and technical seminars to assist with your power quality needs.

PureWave UPS System 50/60-Hertz Ratings1, Dimensions, and Weights

System Rating, kW

Voltage, Volts2

Capacity Current, Amperes

Energy Efficiency, %

Dimensions, Inches (mm)Estimated

Shipping Weight Lbs. (kg)kVA kW Full-Load

Short-Circuit, Sym.

Width Depth Height

250

208380415480

135250270313

135250250250

  37635 000  98 120 (3048) 42 (1060) 96 (2438) 10 500 (4757)

600 313 250   301

500

208380415480

271500541625

271500500500

75250 000  98 190 (4826) 42 (1060) 96 (2438) 15 500 (7031)

600 625 500 601

750

208380415480

406750811938

406750750750

112865 000r  98 329 (8331) 42 (1060) 96 (2438) 25 200 (11 416)

600 938 750 1203

1000

208380415480

542100010811250

542100010001000

150465 000r  98 398 (10 109) 42 (1060) 96 (2438) 31 700 (14 360)

600 1250 1000 1203

1250

380415480600

1563 1250

2374217418791503

65 000r  98

1500

380415480600

1875 1500

2849260922551804

65 000r  98

1750

380415480600

1974215621882188

1750

3000300026312105

65 000r  98

2000

380415480600

1974215625002500

1974200020002000

3000300030002406

65 000r  98

1  60-Hz systems are listed per Underwriters Laboratories Standard UL 1778, “Uninterruptible Power Supply Equipment, 2nd Edition.”

2 Systems are available at other voltages. Contact your nearest S&C Sales Office.

3 Dimensions and weights shown apply to all systems rated 1250 kW through 2000 kW.

r Circuit breakers rated 100 kA interrupting current are available. Contact your nearest S&C Sales Office.

d Applies to system rated 2500 kVA.

Energy Storage Container3

372 (9449) 77 (1955) 135 (3429) 55 000 (25 000)d

Power-Electronic Switch (including hood)3

124 (3150) 122 (3099) 138 (3505) 11 000 (4990)

Power-Electronic Switch (less hood)3

80 (2032) 80 (2032) 138 (3505) 11 800 (5353)

Offices Worldwide f www.sandc.com

Descriptive Bulletin 653-30 December 17, 2007©

Prin

ted 

in U

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