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CONTENTS
PUBLISHER
Danny J. Salchert OFFICE MANAGER
Anita Salchert NATIONAL SALES MANAGER
Jerry DiChiara jerryd@epsmag.net CREATIVE DIRECTOR
Derek Gaylard CONTRIBUTING WRITERS
Ken Whiteside • Glenn T. Keates Justin S. Weinberg • Jeff Jowett CIRCULATION DIRECTOR
Pam Fulmer
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FEATURES 6 Making Sense of Solar Training By Ken Whiteside
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Protecting Personnel from Arc Flash with Time-Delay Switching By Glenn T. Keates, PE and Justin S. Weinberg, EIT
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Clamp-on Ground Testing By Jeff Jowett
DEPARTMENTS 26 33 40
Industry News Product Focus Ad Index
ON THE COVER Cover photography provided by Megger
PRESIDENT
Danny J. Salchert Executive and Advertising Offices 3591 Cahaba Beach Road Birmingham, AL 35242 toll free: 800.981.4541 phone: 205.981.4541 fax: 205.981.4544 www.epsmag.net • danny@epsmag.net Electrical Products & Solutions™ is published twelve times a year on a monthly basis by ABD Communications, Inc., 3591 Cahaba Beach Road, Birmingham, Alabama, 35242, USA. Electrical Products & Solutions™ is distributed free to qualified subscribers. Non-qualified subscription rates are $57.00 per year in the U.S. and Canada and $84.00 per year for foreign subscribers (surface mail). U.S. Postage paid at Birmingham, Alabama and additional mailing offices. Electrical Products & Solutions™ is distributed to qualified readers in the electrical contracting industry. Publisher is not liable for all content (including editorial and illustrations provided by advertisers) of advertisements published and does not accept responsibility for any claims made against the publisher. It is the advertiser’s or agency’s responsibility to obtain appropriate releases on any item or individuals pictured in an advertisement. Reproduction of this magazine in whole or in part is prohibited without prior written permission from the publisher. POSTMASTER: Send address changes to ABD Communications, Inc., P.O. Box 382885 Birmingham, Alabama 35238-2885 PRINTED IN THE USA
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Electrical Products & Solutions • May 2011
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FEATURE • Ontility
Making Sense of By Ken Whiteside
Solar Training
Y
ou want to expand your business. You’re looking for new career paths. You’ve heard a lot about solar energy, but aren’t quite sure its right for you and you don’t’ know how to get started. Start by understanding the opportunities. A number of recent surveys and research reports show some very positive trends. Let’s look at five of them. 1. Solar will continue to grow in the U.S. by leaps and bounds in 2011 and beyond. Most forecasts indicate a market growth rate of 50-60% per year. While homeowners continue to buy solar at a phenomenal rate, commercial property owners are seeing the income potential. Corporations are seeing the savings potential. And investors are lining up to fund solar projects. 2. It won’t just be California making solar headlines. The majority of states — 29, according to the Database of State Incentives for Renewables and Efficiency — have enacted a Renewable Portfolio Standard (RPS) and 7 more have RPS goals in place. As utilities and power producers race to meet the requirements, large-scale photovoltaic projects are likely to start springing up all over the place. From Connecticut and New York through Ohio, Iowa and Missouri to Arizona, the solar industry is booming.
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3. Major firms will enter the solar market in 2011. The entrance of these and other companies show that the industry is reaching new levels of maturity and the big boys want to get in before its too late. For instance, General Electric is reentering the solar market in 2011. The company previously offered PV modules but stopped selling them. Starting in 2011 it will offer two new types of thin-film PV material. “GE’s CdTe panels are available in more limited quantity through 2011,
Electrical Products & Solutions • May 2011
whereas GE’s CIGS panels will be more widely available,” said a General Electric spokesperson. Similarly, Boeing will introduce more efficient photovoltaic panels in 2011 that could displace SunPower as the world’s most efficient commercially available solar modules. And Dow Chemicals will introduce its Powerhouse Solar Shingles for commercial availability in 2011. 4. Fossil fuel prices will increase, making solar more attractive. Continued on page 8
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Across the board, from oil, to coal and natural gas, the cost of digging up deteriorated dinosaur remains is going to get more expensive. Gasoline has recently hit the $3 per gallon mark again and shows no signs of stopping its climb. According to Dennis Markatos-Soriano, director of the East Coast Greenway Alliance, coal prices will also increase, “Supply increases take time so the tight global market will likely push spot market coal prices above $150/ton, potentially challenging mid-2008 levels above $175/ton.” And even with all the recent shale gas discoveries, there are numerous indicators that natural gas prices will rise significantly this year. 5. Solar prices will drop. Both equipment and installation costs are under intense scrutiny and are the subject of major research efforts. Technological advances will continue to drive down the cost of modules, inverters and other equipment and advances in mounting hardware and 8
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installation processes continue to make installation more efficient, reducing the labor cost for systems. Now understand how to get started. You see the opportunities. You need to fully prepare yourself for a new venture. That starts with training. There is an enormous variety of ways to get that training, but here is a description of three simple paths – paths that have been chosen by more than 1,000 electricians, contractors and entrepreneurs. Most people start with ONTILITY S103, Entry Level Solar Electric Training. This highly concentrated 40-hour course provides the solar PV foundation for electricians, contractors, sales, management, estimators and business principals. It’s efficient, it’s effective, it’s a great way to start. A convenient alternative is ONTILITY S105: Entry Level Solar Training (Solar Fundamentals, ONLINE). This is the first three days of S103, captured on video and packaged for self-paced use. So if you want to take a bit more time to absorb the material, S105 is an excellent choice. And paired with one of ONTILITY’s two in-
Electrical Products & Solutions • May 2011
stallation labs, S106: Residential and S107: Commercial, you earn the full 40 hours of instruction required for NABCEP certification. For electricians who want a quick start, S108, Solar Electric Training for Electricians is a great starting point. This two day overview is for electricians only and assumes you already know the difference between series and parallel wiring. Pair it with ONTILITY AS110 Advanced Solar Design for a truly fast track to solar success. Renewable energy is the best hope for full economic recovery, reducing our dependence on foreign oil and launching a career that can’t be outsourced. Your success in this exciting industry depends on excellent training, a reliable supply chain and solid support. ONTILITY can provide all three. Seize the opportunity: learn solar and be part of the next generation of energy in America. ❏ Ken Whiteside is the Director of Education at ONTILITY. He can be reached by e-mail at ken.whiteiside@ontility.com. www.ontility.com
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FEATURE • Electroswitch
Protecting Personnel from Arc Flash with Time-Delay Switching
By Glenn T. Keates, PE and Justin S. Weinberg, EIT
Introduction National Fire Protection Association (NFPA) Standard 70E-2009 requires protection of electrical personnel against the hazards of arc flash. When applied to existing low-voltage installations, this standard can make areas previously considered safe “non-approachable.” Louvers, grates, and other ventilation openings in the housings of certain switchgear commonly used in factories, office buildings, etc., tend to raise the risk level to the standard’s Category 4 or higher. This case study deals with such a problem at the Michigan headquarters of a major health-care insurer. Hired by the insurer to find a cost-effective solution, we conducted a study of this facility’s short-circuit device coordination and arc flash/shock hazard and found its serviceentrance equipment to be “non-approachable” with respect to the NFPA standard. The Problem: “Non-Approachable” Circuit Breakers Since the energy released by an arc flash can be high enough to vaporize metal, some such events have been known to spew molten metal and hot gases, ultimately destroying the equipment. In general, arc flash hazard is abated by de-energizing the electrical equipment involved. The ideal solution is to design the equipment to reduce the risk from the outset. Over the years, NFPA standards have required equipment warning labels as well as guidance for work practices, calculating danger zones, and other preventive measures in the ongoing quest to minimize the risk of arc-flash injury. Circuit breakers are complex mechanical devices that can, without warning, come apart violently upon failure. Rodent infestation, contamination, and other such anomalies can lead to a breaker failure and produce an arc flash event. As defined in the literature, an arc flash event 12
Electroswitch TD-CSR Time Delay Control Switch Relay
can occur when there are “exposed, live parts.” In this case, the exposed parts are circuit breakers that are visible through expanded-metal ventilation louvers. The equipment in question is a doubleended, 480Y/277-volt substation in a “main-tie-main” configuration, fed by a 2000kVA transformer. The available three-phase fault current was calculated to be 42,712 amperessym. The main
Electrical Products & Solutions • May 2011
breaker is 4000 amperes with the long time setting of 1.00. As a point of reference, the breakers in question are General Electric models TC-4000 and 4040 Power Break with GE MicroVersaTrip™ RMS-9 trip units. Using the calculation method described in IEEE 1584-2002, we found that an energy level greater than 40.00 cal/cm2 could be experienced during an arc flash event. Continued on page 14
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FEATURE • Electroswitch
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TD-CSR Switch installed in completed panel
Under Table 130.7(C)(10) of NFPA 70E2009, this made the equipment “non-approachable.”
Proposed Solutions After reviewing the conclusions of our study, the healthcare insurer requested that this situation be mitigated to achieve an NFPA 70E Category 2 environment or better. Among the measures we considered were the following: 1. New switchgear. This option would have cost considerably more than the healthcare insurer wished to spend.
ing into and out of the bus. Under normal conditions, the two currents would be equal, but if a fault occurred at the bus these relays would sense the imbalance and send a trip signal to the breaker. The cost of this option was prohibitive, however. 4. Arc flash/photo-optic relays. With this solution, photo-optic sensors coupled with a conventional instantaneous over-current element would detect an arc flash as it occurred and would trip the corresponding breakers. Once again, the cost to implement this solution was greater than the amount budgeted for the project. 5. Remote switching. This option involved the installation of a remote switching panel located outside the switchgear room. Due to the costs of running the control cables, connecting the fabrication, and securing the cabinet in what would have been a public space, the idea was rejected.
handles of existing switches and operated by wire from a distance when an arc flash is anticipated. This idea was rejected for two reasons: 1) The concern that in the heat of the moment these switches would not be used; and 2) The fact that they were not easily adaptable to the existing switches.
A Unique, Cost-Effective Solution
The idea of using a permanent time-delay switch was then raised. Although it would not lower the risk category as orig2. The addition of an instantaneous elinally planned, it would render the safety ement on the main breaker. This issue moot, since it would allow the opwould have reduced the energy levels erator to be out of the room when the on the tie breaker and main bus, but breaker actually closed or opened. Annot on the line sides of the main other advantage was that it would not be breakers. Nuisance tripping was also in the tripping (protective) portion of the a concern, so the plan was discarded. circuit. 3. Differential protection. The use of All agreed the unit should be a utilityoverlapping bus differential protection grade product. The first relays we conwas reviewed and found to be a viable sidered under these criteria were too large; solution, on the basis that an arc flash they would have either taken up too much event would result in a differential opWe then explored less expensive alter- space in the switchgear or required a seperation. Differential relays would be natives. These included the use of me- arate panel and associated conduit and installed to monitor the currents flow- chanical remote operators, placed over the control wires. Continued on page 16 14
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FEATURE • Electroswitch We then evaluated the Electroswitch Time Delay Control Switch Relay (Model TD-CSR) and found it to have the following advantages: a) It is a utility-grade switch with builtin time delay; b) It is suitable for permanent installation; c) It allows a manually initiated time-delayed trip or close operation with a flashing LED that warns the operator to evacuate the arc flash area. The unit delays a trip or close operation for 10 seconds following initiation, with an option to easily cancel the pending operation. To prevent inadvertent operation, buttons must be depressed for 4 continuous seconds to activate the 10-second delay. (Other settings are available.) d) Its intuitive pushbutton design simplifies personnel training; e) No special wiring is required for installation; f) Its reliable, self-cleaning, double-wip-
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ing contacts with silver or silver alloy surfaces provide very low contact resistance; g) Its rugged, screw-type terminals are rated for 30A/600V continuous current; h) It would replace some existing “lowend” switches with higher quality, more reliable switches.
For more information on the Electroswitch TD-CSR, click on the following link: http://www.electroswitch.com/ electroswitchesandrelays/default.htm. Or contact Electroswitch at (781) 335-5200 or info@electroswitch.com. Glenn T. Keates, PE, and Justin Weinberg, EIT, are Chief Engineer and Electrical Engineer, respectively, at Dymax Engineering in Ann Arbor, Michigan. Electroswitch is the industry leader in the design, manufacture, and marketing of premium-quality switches, relays, and Conclusion related electrical products for high-reliaWhen a “non-approachable” arc-flash bility utility, industrial, and military situation was discovered at the headquar- applications. With all these features in its favor, the TD-CSR was chosen as the solution by both management and the technical crew. Shortly thereafter, the new panel containing the Electroswitch TD-CSR was successfully tested in the Dymax Engineering shop in nearby Ann Arbor. During a scheduled downtime, it was installed and successfully tested on site in August of 2010. It has been in service since then.
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ters of a major health insurer, the engineering firm hired to assess and remedy the problem recommended a unique application of a utility-grade device. The time-delay switch not only provided a cost-effective solution, but also required no change to the facility’s existing relay protection. ❏
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FEATURE • Megger
Clamp-on Ground Testing
By Jeff Jowett
C
lamp-on ground testing has been a controversial technology. At its appearance, circa 1990, it was welcomed as a speedy alternative to the established and time-consuming method of walking out long leads and driving probes into the ground. But there were significant limitations to the method and issues with the technology that presented a backlash in some quarters. The advantages, however, proved compelling and the use of clamp-on testers continued to grow, sometimes to the advan-
Fig. 1
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tage of the user and sometimes not so. To begin at ground level, the testing of grounding electrodes is the measurement of the resistance to “remote earth”, that is to say, to some variable distance beyond which there is no appreciable increase. The aim is to have the resistance of the grounding electrode as low as possible, meeting a design specification, so that fault currents can be passed from the electrical system into the soil without causing damage to equipment, fire on the premises, or a danger to personnel. Although in theory the entire planet exerts a resistance, all but an infinitesimal part of this is concentrated in the area around the electrode. This area can be comparatively small or large, depending on soil composition, local
Electrical Products & Solutions • May 2011
conditions and, of course, the construction of the electrode. In order to reliably measure the associated resistance, the standard ground tester was introduced. Traditional ground testers employ three or four terminals, long test leads, and probes driven into the soil (Fig. 1). The terminals separate test current from voltage detection, as in a Kelvin bridge. By enabling the voltage probe to move independently of the current probe, resistance could be plotted to various points independent of the contact resistance associated with the current probe. Ideally, the graph would show the increase in resistance as the measurements are made farther and farther from the test ground. The point at which the earth is adding no additional resistance can be recognized, and this is the value that marks the effectiveness of the electrode Continued on page 20
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under test. Finally, the superfluous resistance associated with the current probe can be recognized separately at the end of the graph. The technique is well known as Fall of Potential (Fig. 2). This method is rigorous and reliable, defines the design parameters for ground testers, and continues as the standard today. The problem is, it’s a lot of work. And for nearly a century, there was nothing else. The closest thing to a shortcut alternative was the “Dead Earth” test, whereby the tester’s terminals were shunted into a two-terminal configuration and leads connected to the test ground and an arbitrary remote return. This was often the water-pipe system but could also be something like a fence post or an auxiliary rod driven for the purpose (Fig. 3). When energized, the tester would measure the series loop resistance of the entire system. Accuracy would depend on the extent to which the other elements beside the soil contributed to the reading. “Dead Earth” was adopted as a betterthan-nothing test, and gained limited acceptance, with appropriate caveats, from the IEEE Standard 81, “Guide for Measuring Earth Resistivity, Ground Impedance, and Earth Surface Potentials of a Ground System.” However, the limitations were severe. Using a ground tester afforded the advantage of an AC test signal (alternating square wave), and the testers came provided with the long leads
Fig. 2
necessary to reach the remote return. But the other elements being measured, especially the resistance of the remote return, added considerable potential error to the reading. The presumption was built in that something like the water-pipe system would not contribute appreciable added resistance, but this is not necessarily true. Furthermore, the two resistance fields could be overlapping and there could be a coupling effect. If performing a standard
Fig. 3
three-terminal test, as described above, the graph would reveal this contingency and it could be corrected by simply repositioning the probes. But a “Dead Earth” measurement had to be accepted at face value. Ground testing was circumscribed in this manner until the late-20th century introduction of the clamp-on method. This was an extension of clamp-on current measurement with a second winding added to the jaws. When clamped around a ground rod or grounding conductor and energized, one winding inductively establishes current flow while the other senses voltage drop around the circuit. The primary voltage of the test current inducing core is kept constant so the current actually induced into the test circuit is directly proportional to the loop resistance. The loop resistance of the entire circuit is then calculated by Ohm’s Law and the Law of Parallel Resistances: V/I = Rx + ____1_____ where, usually Rx >> ____1____ n n k=1 1 k=1 1 Rk Rk
In this equation, Rx is the ground under test, while the remaining term is the parallel resistance of the reference ground used to return the current to the tester. Obviously, the lower the reference ground resistance, the more accurate the reading of the test ground (Fig. 4). Note the sigContinued on page 22 nificance of the “much 20
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FEATURE • Megger
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greater than” (>>) symbol. The concept works best when the multi-grounded utility is providing the return path. The induced current on the test ground travels through the soil and seeks its own return through the electrical system. Many parallel grounds, as in for instance a line of pole grounds, can complete the circuit with little added resistance. But the reading will
always be a bit high because this factor cannot be eliminated. The error, at least, is on the right side, since a ground resistance pass/fail is defined as at or below, not at or above. The operator should not lose sight of this factor when comparing readings taken with a traditional test, which will not always agree. The two methods aren’t measuring precisely the
Fig. 4
Fig. 5
same thing. But even in such cases, clampon readings taken on a comparative basis can be a valuable tool in troubleshooting an electrical system. Accordingly, the clamp-on technology has eliminated (as in reduced to relative insignificance) the biggest problem with Dead Earth, the added resistance of the return. To be clear, the Dead Earth method requires a test lead and a physical connection, as by an alligator clip, to the selected reference ground, which therefore limits the connection to only one. Clamp-on, because the current can wander freely and seek its own return, can take advantage of as many paths as exist and thereby dramatically reduce the extraneous resistance from the measurement. The issue still exists as to the distance the current travels through soil and whether this represents the complete electrical field of the test ground. A return path too close could produce a deceptively low reading, and the operator must understand the electrical system and exercise good judgment (Figs. 5 & 6). But there’s another problem. Traditional testers employ a square wave test current. Frequency is normally Continued on page 24 close to a utility FOR FREE INFO, CIRCLE 31 ON READER SERVICE CARD
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Fig. 6
frequency or harmonic, but distinct enough to be recognizable by the tester so as to eliminate interference. Induced current from a clamp-on, however, must be at high frequency, in units of kilo-Hertz. This makes interference a problem, both from extraneous sources and between the two windings lying in close proximity within the tester jaws. The first wave of instruments some twenty years ago had great difficulty coping and had a tendency to produce erroneous readings. This was quickly noted in the field, and the method called into question. Studies were made comparing readings by both methods, with results that cast doubt on the clamp-on’s reliability. In some quarters, it became an outcast. However, years of field R&D have improved the shielding and reduced or eliminated this problem in top quality modern instruments. Added shielding relied initially on increased distance between the windings, which tended to make the heads bulky and difficult to utilize in tight situations. This issue too has been significantly reduced in modern testers by sophisticated shielding methods that don’t rely purely on increased bulk. Modern testers have solved the technology issues. They’ve introduced ergonomic, safety, and convenience features. Designs adapted to field concerns now permit easy manipulation in tight spaces and clamping of ground buses. The all-important safety features go as high as CAT IV arc flash protection and automatic warning of current on the grounding electrode. New convenience features like limit alarms make 24
Fig. 7
testing quicker and simpler in difficult environments, and include storage and downloading of results. But there still are, and always will be, operational limitations that must be understood and properly handled. Most important, a clampon tester cannot be used to test an isolated ground, as in a commissioning test of a new system, for instance. It relies on connection to the utility, or some suitable substitute, to provide the necessary return path. A mere rod driven into the ground reads as an “open”. A temporary return can be established by stringing a wire (Fig. 7), but this is often impractical. Note conversely, however, that where a traditional tester requires lifting the connection to the utility in order to test the site ground, a clamp-on does not. More difficult are situations where a complex grounding system provides multiple return paths through the metal structure, without the test current entering the soil at all. A substation, for example, with all metal structures tied together at equipotential, offers no point at which current must enter the soil in order to complete its circuit (Fig. 8). A nice low reading will result, but it is only the continuity of the structure. It may be all too easy to locate a convenient point for a low reading, but the operator must be aware of the system design. Properly equipped with this informa-
Electrical Products & Solutions • May 2011
Fig. 8
tion, the operator can use the clamp-on for quick and easy bonding checks of welds and connections. Clamp-on readings are not verifiable. All the operator does is clamp and energize; the tester does the rest. The reading must therefore be accepted on its own terms. By contrast, a traditional test, where the operator places the probes and thereby controls what is measured, can produce either a graph or a mathematical test that will reveal if the result is inconclusive and the test repeated. No such assurance exists with a clamp-on. Accordingly, the clampon method does not presently enjoy the benefit of acceptance by any standards organization. Once understood, the benefits of clampon ground testing easily match or outweigh the limitations, and the instrument will quickly pay for itself in saved manhours. ❏
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Industry NEWS
Green Learning: Conergy completes three solar installations at CA school sites 400 kilowatts of clean solar energy for students at Muroc Joint Unified School District
W
ith the new Conergy solar energy system, students of all ages at the Muroc Unified School District will now experience clean solar energy and learn about sustainable energy generation. The three installations, with a total power output of nearly 400 kilowatts, are on the grounds of the schools’ district office, the West Boron Elementary school and the Boron Senior High school. The solar energy systems will provide 80% of the school district’s energy consumption, reducing its utility bill by 95%. These benefits are made possible by Conergy’s clean solar power systems, comprising nearly 1,700 Conergy modules. Total expected savings to the district over the system’s 30 years expected lifespan is approximately $3 million— with no out of pocket or up front expenses to the district. Solar energy finance company, Efinity, delivered funding for the project through a Power Purchase Agreement. “We are glad to have the opportunity to install solar power on Muroc’s school grounds”, says Conergy’s David Vincent, Project Development Manager. “Being exposed to solar energy, the students get a feel for the effectiveness and accessibil-
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ity of sustainable energy while increasing their environmental awareness. In sunny California in general, and Muroc in particular, the clean energy future is becoming a reality.” Pupils and school staff are proud of their solar plant. “The three Conergy installations produce a total of around 705 megawatthours of clean solar energy per year; avoiding the emission of more than 500,000 lbs of harmful CO2 greenhouse gases”, explains Byron Johnson, Muroc Unified School District Assistant-Superintendent. “This is as much electricity as one hundred Californian households consume annually. By creating our own energy, students and staff become more aware of their energy use and are inspired to use energy wisely. This helps us to encourage ‘green learning’, by producing clean energy and using less energy whenever possible.” ❏ About Conergy USA Only Conergy delivers solar energy systems from a single source. As a system manufacturer, Conergy produces all components for a solar installation and offers
Electrical Products & Solutions • May 2011
all services under one roof. With its modules, inverters and mounting systems, the solar expert creates Conergy System Technology, which is efficient and synchronized solar energy systems for private or commercial rooftops, as well as for multiMegawatt Parks. Conergy System Services deliver a “Worry-Free Package” for Conergy solar installations. Conergy’s experts not only install on-site turn-key solar projects, but they also manage the planning and financing, project implementation, system monitoring, operation and on-going maintenance of the project for maximum performance. With this comprehensive technology and service package, Conergy offers yield insurance for its installations. Conergy System Sales brings Conergy premium products to nearly 40 countries. The solar expert supports homeowners, installers, wholesalers and investors in their efforts to “go solar” through deep-rooted local operations in 18 countries. With sales activities on five continents, Conergy has close relationships with all its customers. Listed on the Frankfurt stock exchange, Conergy employs more than 1,700 people worldwide. Since Conergy’s founding in 1998, it has produced and sold more than 1.5 GW of clean solar power. Through its acquisition of well-established local companies, Conergy began operating as a distributor and project developer in North America in 2005 and currently has five offices, four warehouses and two production sites in the region. Conergy manufacturers mounting systems in Sacramento, CA. In Ontario, Canada Conergy produces mounting systems that meet local content requirements for the Provincial FIT. In addition, Conergy operates a Project Group that develops and operates large-scale systems. Through these activities, Conergy maintains expert knowledge about local market conditions and requirements.
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Industry NEWS
Lunera Lighting 5400 SERIES Commercial LED Fixture Wins Platinum ADEX Award Four-foot Grid Lay-In LED Fixture is Designed for Use in Armstrong® TechZone™ Ceilings
L
unera® Lighting, Inc., a Silicon Valley company that designs, manufactures, and markets next-generation LED lighting, is pleased to announce its 5400 SERIES has won a platinum ADEX 2011 award. Lunera partnered with Arm-
strong Ceiling and Wall Systems to deliver the 5400 SERIES, an edge-lit LED lighting fixture compatible with Armstrong TechZone Ceiling Systems. The sleek, energy efficient, linear fixture creates a clean, elegant ceiling visual and provides voluminous
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Electrical Products & Solutions • May 2011
light when installed in the six-inch-wide technical zone. "Lunera Lighting is delighted to receive the prestigious Design Journal Platinum ADEX 2011 award for its 5400 SERIES luminaire. The 5400 SERIES is the first LED luminaire available for installation in premium Armstrong TechZone ceilings. Its sleek design, daylight quality light, and precision engineering beautifully enhance the elegant TechZone ceiling experience. Unlike typical fluorescent solutions, the 5400 SERIES is energy efficient and provides a mercury-free, recyclable light source. Lunera is honored to be recognized by Design Journal for the second consecutive year, for our commitment to both excellence and leadership in LED luminaire design," said Rich Warmke, Lunera Director of Marketing. Manufactured in the U.S.A., Lunera’s 5400 SERIES of digital LED fixtures combined with the Armstrong TechZone Ceiling System creates a clean, linear visual appearance that greatly enhances the aesthetics of a room. By using Lunera’s truLITE™ Color Consistency Process, the light fixtures maintain uniformity of light across an entire installation creating a more productive and appealing interior environment. The Lunera 5400 SERIES fixture is available in 9/16” tegular and 9/16” and 15/16” lay-in form factors. “Armstrong is pleased to be a part of Lunera’s success with the 5400 SERIES. When combined with our ceiling system, the LED fixture helps organize the ‘clutter’ in a grid ceiling. The result is a cost-effective, clean, linear ceiling aesthetic using standardized components. Easy access to the fixture adds to the benefits of this noteworthy, energy saving combination by minimizing installation time and panel damage, since the technical zone houses all technical services,” said Gregg Maberry, Manager of Sales Integration for Armstrong Building Products. Similar to other Lunera products, the 5400 SERIES can reduce energy consumption by up to 50 percent compared to traditional installed lighting solutions, and offers a 12 to 15 year (50,000 hour) maintenance –free life in typical office applications. A hallmark of Lunera’s fixtures is the beautiful full-spectrum daylight quality light emitted through optics that volumetrically fills a room. ❏
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Industry NEWS
SMA Canada Production Underway at Ontario Manufacturing Facility Ontario FiT-Compliant Residential, Commercial and Utility-Scale Solar Inverters Available
P
roduction of the SMA Sunny Boy and Sunny Central solar inverters is underway in Ontario. These residential, commercial and utilityscale devices are being assembled by Celestica, a global leader in the delivery of end-to-end product lifecycle solutions, to meet Ontario’s microFiT and FiT domestic content requirements. Celestica will initially produce the SMA Sunny Boy 3000-US, 4000-US, 5000-US, 6000-US, 7000-US and 8000-US inverters, as well as the Sunny Central 500HE model. Celestica’s operations will follow a flexible concept, with the ability to quickly adjust production to meet the needs of Ontario’s fast-growing solar market.
To comply with the area’s domestic content requirement, Celestica will assemble all of SMA’s products at its Toronto operation. “SMA chose to work with Celestica at its Canadian operations based on its reputation for highest-quality manufacturing and ability to rapidly scale-up with growing demand,” said Scott Crabtree, managing director of SMA Canada. ”We are very pleased to be working with such a capable group and look forward to a successful collaboration.” Crabtree, who leads SMA’s U.S.-based assembly in Denver, will also oversee the company’s Canadian efforts. SMA’s 3,000- to 8,000-watt Sunny
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Boy models, which are ULC (Underwriters Laboratories Canada) Certified, are part of the world’s most popular line of solar inverters. Not only does the Sunny Boy line feature class-leading efficiency and reliability, but the longevity of these inverters is enhanced via SMA’s patented OptiCool™ active temperature-management system and rugged cast-aluminum, outdoor-rated enclosure. They include a 10-year factory warranty, with the ability to extend up to 20 years. The utility-scale Sunny Central 500HE (high efficiency) features a maximum output of 550 kVA and integrated gridmanagement features. By connecting to an external medium-voltage transformer to accommodate long distance power feeds to distribution substations, the Sunny Central 500HE is ideal for utility installations. Its industry-leading maximum efficiency of 98.6 percent results in an outstanding energy yield. The Sunny Central 500HE is available with a 99 percent uptime guarantee. ❏
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Product FOCUS
New Steel City® 68-HP Floor Box Redefines Capabilities Available in Three-Gang Floor Box Thomas & Betts’ new Steel City® 68-HP Non-Metallic Floor Box redefines the traditional three-gang floor box: Instead of a large, rectangular box with multiple covers, the 68-HP is a six-inch round box with the capacity for three standard devices under a single, round cover. Voltage dividers allow any combination of power, data, and audio-visual devices to be installed, including four power outlets and six data jacks – a configuration only possible with the Steel City 68-HP Floor Box. The Steel City 68-HP Non-Metallic Floor Box also features an unobtrusive slide-latch cover that can be opened and closed easily without tools, lies out of the way and is flush to the floor while in use. Available in solid brass, solid aluminum and a variety of powder-coated finishes, the Steel City 68-HP Non-Metallic Floor Box complements any décor style. A cast-iron version is available to meet specification requirements for slab-on-grade applications or metal conduit systems. The box includes one-inch and one and a half-inch, in-line hubs for easy routing of power and communications cabling. A furniturefeed cover with one-inch and one and a half-inch hubs is also available for modular furniture applications. For more information, visit www.tnb.com
Electri-Flex Company Updates Full Product Catalog Electri-Flex has updated and re-released a full product catalog featuring their complete line of nearly 40 types of flexible metallic and non-metallic conduit. This 40 page catalog incorporates the following product categories: Jacketed Metallic / Liquatite®, EMI/RFI Shielding / Shield-Flex™, Unjacketed Metallic, and Non-metallic conduits. The catalog changes consist of updated information on existing products, as well as the following new products: • LTFG - a NSF Certified Component for Food Grade applications, flexible conduit; • Colored Conduits, available in a variety of jacketing types and colors ranging from red, green, blue, orange, yellow, white, and many more; • the Shield-Flex™ line of shielding conduit; • ABRH, a non-jacketed, CSA-Certified flexible aluminum conduit; • FSC, a non-UL, non-jacketed flexible steel conduit; • and Flexible Metal Pre-assembled Whips. For more information, visit www.electriflex.com
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Product FOCUS
Appleton Introduces Explosion-proof Outlet Box Appleton has introduced its new GRUSE100 one-inch pump jack fitting, targeted at the petrochemical industry. UL Listed and CSA certified for hazardous locations, the explosion-proof GRUSE100 enables the safe connection of conduit lengths via its three one-inch unions, while a spacious 29-cubic-inch interior allows easy pulling of wire and fast access for maintenance. The GRUSE100 further broadens Appleton's Unilet® outlet boxes and bodies to meet the diversified needs of both hazardous and non-hazardous industrial environments. Both the cover and body of the GRUSE100 are made from copper free aluminum with an epoxy powder coat finish providing superior corrosion resistance. The cover is externally threaded and supplied with a neoprene o-ring gasket while the box is supplied with a ground screw. Appleton GRUSE100 one-inch pump jack fittings are UL listed and CSA certified for Class I Groups C, D, Class II, Groups E, F, G, Class III, and for NEMA 3, 4. For more information, visit www.appletonelec.com
PV Analyzer Product Feature Verify PV Array Performance with Solmetric PV Analyzer The new Solmetric PVA-600 PV Analyzer is a complete electrical test solution for verifying photovoltaic array performance: • Demonstrate with confidence that your newly installed PV systems meet spec at commissioning • Quickly troubleshoot system problems • Create a track record of your system performance over time For each string or set of strings, the analyzer measures I-V curves, that is, current and power as a function of voltage. Measured results are compared to the performance predicted by advanced built-in models. This enables greater confidence in DC performance at startup and commissioning, faster installation and repairs, and detailed history of array performance over time. The PV Analyzer measures the DC parameters up to 600V and 20A. Sign up for the free webinar “Verifying PV Array Performance”, on our website. For more information, visit www.solmetric.com
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New IDEAL Coax Stripper Helps Prevent Poor Connections that Lead to Video Reception Problems Company Enlists Facebook Fans to Test New Tool More than 70 percent of video reception problems can be traced to a bad cable connection. Lots of times, the culprit is a badly stripped length of cable. IDEAL is helping to assure better connections by introducing its new 45-321 coax stripper expressly designed to perform cleaner, faster 1/4” x 1/4” strips of RG-6/6 quad and RG-59 coax cables used in the transmission of cable television, satellite broadcasting, and analog CCTV signals. The new stripper features a self-adjusting blade that instantly conforms to different diameter coax cables, resulting in higher accuracy at a lower overall cost of installation. The 45-321 has a Spinner Ring that orbits the full circumference of the cable to deliver faster stripping without compromising precision. Comfort is key to any successful hand tool. The 45-321 is ergonomically shaped, lightweight and easy to maneuver in tight spaces. It is also compact in size so it fits easily inside a pocket or tool tote. The introduction of the 45-321 marks the first time IDEAL has tested a tool by offering 25 free samples to its fans. Once the fans have tried out their 45-321 they’ll will post comments about their experience. The company plans to continue the Facebook fan sample program as part of future new product releases. For more information, visit www.idealindustries.com
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Product FOCUS
Platinum Tools® Features New 4Mapper Coax Tester at EDS 2011 Now Shipping, Platinum Tools’ 4Mapper Coax Tester is the Solution to Find and Identify Single or Multiple Coax Cables Connected to Televisions, Security Cameras, Splitters, Monitors or Routers Platinum Tools® (www.platinumtools.com), the leader in solutions for the preparation, installation and hand termination of wire and cable, is proud to announce that it will feature its new 4Mapper Coax Tester at EDS 2011, held in Las Vegas, Nev. at the Paris and Bally’s hotels from May 24-26, 2011, booth #4045. Now shipping, Platinum Tools will be demoing the 4Mapper, as well as its new VDV MapMaster tester, during the show. “Platinum Tools’ 4Mapper Coax Tester is the easy and quick solution to troubleshooting and identifying multiple coax cables connected to security cameras, televisions, monitors, routers, and splitters,” explained Lee Sachs, Platinum Tools, Inc. president and general manager. “Made in the USA and fast and easy to use, the individually identified custom remotes allow the user to track up to four connections at a time from the main cable box.” For more information, visit www.platinumtools.com
Thomas & Betts Introduces STAR TECK EXTREME DIRECTOR™ Cable Fitting, Industry’s First Adjustable, Range-Taking Fitting The STAR TECK EXTREME DIRECTOR™ Cable Fitting from Thomas & Betts is the industry’s first truly adjustable, range-taking fitting, used to terminate metal-clad and Teck cable. Featuring an exclusive swashplate design, the STAR TECK EXTREME DIRECTOR easily adjusts from 90 to 180 degrees, allowing faster, more cost-efficient installation. “The STAR TECK EXTREME DIRECTOR Cable Fitting is available in half- and three-quarter inch NPT hub sizes and covers a wider range of applications than other types of fittings,” said Tony Kolznak, product manager with Thomas & Betts. “Not only does the DIRECTOR accept a wider range of cable diameters, it also reduces the number of components required when making angle adjustments. These features allow you to reduce inventory and save time when on the job.” The STAR TECK EXTREME DIRECTOR Cable Fitting also occupies less space than 90degree elbows or LB conduit bodies, especially advantageous where space is limited. A full circular bore provides easy cable insertion, and alignment guides serve as handy reference points for ensuring that fittings are installed at the same angle. Additionally, the fitting requires no disassembly prior to installation and can be disconnected easily. Designed for optimum integrity in non-classified (Ordinary) applications, the STAR TECK EXTREME DIRECTOR Cable Fitting is NEMA Type 4 and meets NEC Class I Division 2 / Zone 2 and Class II Division 2 / Zone 2 when installed per articles 501.10/505.15 and 502.10/506.15. Other features include: • Compression nut for adjusting hub position is colored blue for better visibility • Removable armor stop makes fitting range taking • Elastomeric collar ring and cone-shaped bushing for a liquidtight seal and insulation grip • Stainless steel grounding ring with dual sets of grounding devices for a 360-degree, longterm, dependable grounding • Non-corrosive aluminum body and gland nut • Low-profile gland nut for tight spaces; can be installed with a screwdriver or wrench and serves as a cable-stripping gauge • Perimeter teethed for superior electrical bonding • Built-in sealing gasket for 360-degree seal, even with rough enclosure surface For more information, visit www.tnb.com
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ILSCO SureCrimp® UL 467 Listed SureCrimp® Copper Compression Connectors, from ILSCO, with a Conductor Range 1/0 – 8 are Now UL 467 Listed for Grounding and Bonding. SureCrimp is available in various configurations, including bent and narrow tang, standard and long barrel, with one hole or two hole tang, as well as sight hole or no sight hole. SureCrimp reduces inventory requirements; the connectors accept multiple conductor classes including fine stranded, flexible cable, DLO and building wire. UL Listed, CSA Certified, and range taking when installed with approved tools and dies. Circumferential dies produce strong, long-lasting crimps with a tight crimp profile for greater pull-out strength. The increased contact area reduces resistance and eliminates the potential for flash. Applications include: Wind Turbine, Solar Panel, Petroleum, Welding, Marine, Co-generation and more. ILSCO is your ClearChoice® for electrical connectors. For more information, visit www.ilsco.com
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Product FOCUS New Control Six™ Online Interactive Tool Helps Identify “Best Fit” Energy-Efficient Lighting Control Solutions WattStopper has launched Control Six Online, a new free online tool to help users pinpoint ideal lighting control solutions for the six types of spaces most commonly found in commercial buildings. This interactive selector offers two levels of performance, with unlimited access to a single room Quick Selector and login access to a Multi-Room Selector developed for professional users. Both versions prompt users to input information about each space in order to recommend appropriate products. Control Six Online recommends lighting control solutions including wall switch and ceiling occupancy sensors, time switches and lighting control panels for the following areas: • Offices • Conference Rooms • Restrooms • Lunch/Break Rooms • Utility/Storage Rooms • Exteriors The Quick Selector provides easy-to-use drop-down menus and pre-populated options to guide the user to a robust control solution. Once a single room solution is identified, users can download PDF documentation including project identification, selected options and model numbers and photos of products needed. For more information, visit www.wattstopper.com/ControlSix
New Channellock® 8” 368 High-Leverage Lineman’s Plier Boosts Cutting Power for Professionals and DIYers Channellock Inc. is proud to announce the launch of its new 8” 368 high-leverage linemen’s plier, the latest in high-performance design from the company known worldwide for manufacturing quality pliers. The new plier’s high-leverage capability is achieved by positioning the rivet within fractions of an inch of the laser heat-treated cutting edges, giving it more power to cut through fish tape with less effort than competing professional-grade brands. “The new 368 is the second release from our high-leverage linemen’s pliers line that we will continue to expand throughout the year,” said Ryan DeArment, vice president of sales and marketing at Channellock Inc. “We’ve been working closely with electrical professionals and do-it-yourselfers to provide them with significantly enhanced linemen’s pliers that clearly provide more force and require less effort to use. So far, their feedback has been overwhelmingly positive.” With a measurement of 8.38” in length and a weight of less than one pound, the new 8” 368 highleverage linemen’s plier is perfect for those wiring on construction jobs where larger linemen’s pliers may not fit. Unlike competing brands, the new 8” 368 high-leverage linemen’s plier also provides noticeably more leverage and features knife-and-anvil cutters to ensure proper cutting edge alignment. This means less force is required to cut through high-tensile-strength fish tape or wire. The new 8” 368 high-leverage linemen’s plier also provides even more utility with its useful, built-in crushing area. Like all CHANNELLOCK® pliers, the new 8” 368 high-leverage linemen’s plier is fiercely made in Meadville, Pa. It features drop-forged, high-carbon C1080 steel and the signature CHANNELLOCK BLUE® comfort grips. For more information, visit www.channellock.com
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Shade Measurements in Hard-to-Reach Places In many situations, shade measurements are needed but you cannot get yourself into the right position. For example, roof access may be difficult or not allowed. Or a proposed solar structure is not yet built. Ladders and lifts can be expensive or dangerous, and calculations can be difficult and error-prone. The new SunEye Extension Kit enables accurate measurements with a Solmetric SunEye™ 210 up to 5.4m (17.7 feet) above ground level. It consists of a telescoping extension pole with a plate at the top to hold a Solmetric SunEye 210 securely. The full assembly is lightweight, rugged, and non-conductive. The Solmetric SunEye 210 is a handheld electronic instrument for measuring shade and evaluating a site for a solar energy system. When using the Extension Kit, SunEye measurements are captured by rotation of the pole combined with audio feedback from the SunEye. The SunEye will automatically correct the measurements for azimuth and tilt using inputs from the on-board sensors. For storage and transport the Extension Kit collapses to a length of 1.5 meters (4.9 feet). For more information, visit www.solmetric.com
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Advertiser INDEX This advertisers index is compiled as a courtesy to our readers. While every effort is made to provide a complete and accurate listing of companies, page numbers and reader service numbers, the publisher is not responsible for errors.
Company
PG#
RS#
AEE SOLAR
15
13
AEMC INSTRUMENTS
IFC
AMERICAN TECHNICAL PUBLISHERS
PG#
RS#
MASTERACK COMMERCIAL VEHICLE EQUIPMENT
35
35
1
MEGGER
19
15
22
31
NFPA SHOW 2011
32
33
ARPI OF USA
37
36
NORTHWEST LIGHTING SYSTEMS
25
18
BYTE BROTHERS
28
32
PG LIFELINK
IBC
2
CONDUIT REPAIR SYSTEMS
4
6
PHASE-A-MATIC
39
39
COPPER DEVELOPMENT ASSOCIATION
29
20
SOKKIA
5
7
30, 31
21
SOLAR UNIVERSE
10
10
EXTECH INSTRUMENTS/FLIR SYSTEMS
3, 9
5, 9
STEELMAN INDUSTRIES
35
34
E-Z METER
37
37
STRIP-TEC
16
30
GARVIN INDUSTRIES
27
19
THE HOME DEPOT
BC
3
GENERATOR INTERLOCK TECHNOLOGIES
7
8
TOSHIBA INTERNATIONAL CORP
13
12
HIOKI USA
11
11
UNDERGROUND DEVICES
40
40
ICC
17
14
UTILITY METALS
23
17
KRENZ & COMPANY
39
38
VERVE LIVING SYSTEMS
1
4
LAPP USA
21
16
DC POWER SYSTEMS
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