2001 Power Plus Revs

ISO 9001 Certified
Transforming the
Future of Power Technology
Product Bulletin
PowerPlus Series
High-Frequency Power Conversion Technology
™
PowerPlus—A Totally New Technology that Provides a Better,
More Cost-Efficient Way to Collect Particulate
NWL’s PowerPlus Series represents an entirely new way of thinking about electrostatic
precipitator (ESP) power supplies. This exciting new approach uses state-of-the-art, threephase, high-frequency, solid-state switchmode technology for collecting the particulate
matter in ESPs.
The PowerPlus is not just a T/R and Controller, but a complete Power System. This new
technology offers significant advantages over conventional Transformer/Rectifier.
• More efficient—puts up to 30% more power into the ESP
• Combines T/R, controller, and ground switch in one package
• Requires less input current
• Easier to install
• Field serviceable
• Smaller and lighter than traditional (T/R's)
• Limited duct work required
Units in the PowerPlus Series
weigh less than 25% of conventional systems while occupying
only 55% of their footprint and
40% of their volume. Yet these
units will provide superior performance with dramatically
reduced operational costs.
The PowerPlus Series is now
available in three different kW
ratings. All models can be run at
70 kV. Their amperage output is
400ma, 800ma and 1000ma,
respectively
PowerPlus represents more
than just the next generation of
power supplies for pollution
control, but a quantum technological leap in performance and
economy—all in a smaller,
more-manageable package.
Product Bulletin
2
■ Greater efficiency—The PowerPlus Series can dramatically improve collection efficiency by delivering higher average kV and more current to the ESP.
Traditional T/Rs generate higher peak voltages due to higher ripple that causes sparking in the ESP collection field, thus limiting the average voltage to electrodes.
The PowerPlus Series allows the ESP to operate at higher average voltage and current
(Less ripple) up to the point at which sparking occurs. The PowerPlus improves overall
system efficiency.
■ More cost effective—PowerPlus requires less input KVA then the conventional T/R
and control systems, while delivering the same kW output. PowerPlus also allows faster
arc shutdown so less energy from the source is sent to the ESP during arcing.
In addition, the Series requires less transformer fluid, reducing containment problems.
The chance of fluid ignition is also reduced due to the high speed of its Insulated Gate
Bipolar Transistor (IGBT) control devices and the defined impedance of the resonant
circuit.
Since their reduced size and weight facilitate faster installation and there is no separate control cabinet to install, savings can occur even prior to operation.
■ Better control—Since they operate at frequencies much higher than the input line,
power to the ESP can be controlled within microseconds, independent of the line frequency.
As a result, more advanced control strategies can be employed than with phase-controlled SCRs. For example, PowerPlus allows faster, more precise control of voltage
recovery following an arc, and intermittent energization timing is not tied to the line frequency and modulation of the output voltage.
The PowerPlus Series also offers greater control options and flexibility, whether locally as a standalone display/control system, or when connected with NWL’s PCAMS
(Precipitator Control and Monitoring System). PCAMS provides real-time monitoring
and control of all ESP, Power, and Rapping parameters of one or multiple ESPs from a
personal computer.
■ An integrated system—Each PowerPlus System is delivered ready for convenient
installation as an integrated, three-phase input, DC-output package that includes the
controller and optional ground switches.
■ Field-serviceable—PowerPlus units are designed for easy field replacement of all
major components so the complete unit should never need to be removed from the precipitator. All assemblies, except the transformer/rectifier tank, weigh less than 45
pounds. The tank assembly weighs 500 pounds, which will be much easier to field
replace than conventional 60Hz TR sets.
■ Total technical support—While PowerPlus is a radically different product for ESPs, it
draws upon NWL’s extensive design and manufacturing experience. For more than 20
years NWL has provided high-frequency transformers/rectifiers and other components
for a wide variety of industrial and military applications. The products also rely on
innovative capacitor technology from NWL’s Snow Hill, NC Capacitor Division.
With NWL, you also get expert 24/7 technical support and diagnostics from a singlesource supplier, a company that has been serving the power and process industries with
power systems for more than 50 years.
■ Trial offer—NWL offers trial installations of three months to allow you to evaluate this
new technology, along with a variety of options and accessories. For more information
contact NWL (Tel: 609-298-7300; Fax: 609-298-8235); Email: hherder@nwl.com; or
visit our Website www.nwl.com
.
Product Bulletin
3
Key Parameter Comparison: PowerPlus Series vs. Conventional T/R Systems
70kW Model
Parameter
PowerPlus 70kW
Conventional T/R System
kVdc
70
65
mAdc
1000
1000
Peak kV
71.8
109.2
Output kW
70
65
Input kVA
78.7
109
Input Vac
460
460
3
1
Iline (AAC)
98.8
237
Power factor
0.94
0.63
25 kHz
60 Hz
Losses (kW)
4.0
3.5
% Ripple (kVp-p)
3-5
35-45
30 usec
8.33 msec
Forced Air
Natural Convection
22
60
8
18
27 Gal/102 L
135
1000 Lb/454 Kg
3860
Factory
Field
Phases
Operating frequency
Arc shutdown time
Cooling
Volume Envelope (cubic feet)
Plan Envelope (square feet)
Gallons of fluid
Weight (lb.)
Wiring from T/R to control
NWL
Transforming the
Future of Power Technology
NWL has specialized in the custom design and manufacture of
power-conversion systems for more than 60 years. We are dedicated to the highest standards of quality and service—and to
finding the best solutions to our customers’ needs.
NWL maintains a high degree of control over all products
that is unusual in today’s “built elsewhere, assembled here”
environment. We develop, design, manufacture, distribute and
support all our products from start to finish. This assures compatibility of components, preserves design integrity and delivers
a consistent level of quality.
It also means that when you need support on our products, or
require adaptation to your specific needs, we will have the
answers. You won’t encounter finger-pointing, or a referral to
the “real” maker. We are the real maker.
NWL’s expertise ensures that you will get maximum performance and value from our products. Cross-industry experience
lets us adapt proven techniques from one market discipline to
the needs of customers in others—with a library of over 40,000
proprietary designs to draw on.
For more than 60 years, customers have looked to NWL for
innovative solutions and solid reliability in components, power
supplies, controls and related products. We are the power
conversion specialists, committed to providing a total solution
that meets or exceeds the needs of system integrators, OEMs
and end users—our customers.
Transforming the
Future of Power Technology
NWL • 312 Rising Sun Road • Bordentown, New Jersey 08505 • USA • Tel: 1 800 742-5695 • Fax: 609 298-1982 • www.nwl.com
NWL Europe • via per Ghevio n˚19 • 28046 Meina (NO) • Italy • Tel/Fax: 390-322-669914 • E-Mail: TEMA-NWL@intercom.it
NWL Pacific • 253-9, ShinKee-Ri • Seowoon-Myun • Anseong-Si • KyungKee-Do 456-850 • Korea • Tel: 82-334-6726240 • Fax: 82-334-6726246
ET 127 12/01