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Distributed Energy
The Journal of Energy Efficiency & Reliability
P.O. Box 3100
Santa Barbara, CA 93130
Tel. (805) 682-1300

September-October 2010
Volume 8 - No. 5

Reaching Breakeven with Little Delay
Two case studies indicate that energy-efficient lighting
upgrades can result in a rapid financial payback.

By Don Talend

Regulating Fixture-to-Panel Electricity
One new lighting control system manufacturer custom-designs its system for each facility, and that controls the amount of electricity that flows from the lighting panel to individual high-intensity discharge or fluorescent fixtures after the fixture is first turned on, yielding a reported typical energy savings of 15%-35%, and a payback period of one year is said to be possible. The manufacturer, Magnetic & Transformer Technologies Corp., points out that it WattManager fixture requires more energy when first turned on; after warm-up, the fixture is ignited and stabilized at normal voltage. The manufacturer custom-designs the fixture for a proposed facility. After a predetermined warm-up period of 10-18 minutes, the voltage is decreased. The fixture is then powered by a constant voltage level, reportedly with no perceptible loss of light.

The system controls any ballast-based, gaseous lighting circuit of lighting system and interfaces with any dedicated lighting circuit of 120, 240, 277, 208, 480 V in load currents of 20 to 120 amperes for single phase or 20 to 150 amperes for three-phase systems. The appliance is installed directly before the electrical panel, and no relamping is necessary. The system reportedly works in conjunction with other energy saving devices, such as high-efficiency lamps, photoelectric switches, and other energy-management systems and down-line switching capability is also available.

Installation involves connecting three or four power wires from the fixture electrical panel to the system's unit enclosure box; the other system parameters are set up at the factory.

To read the original article published in the Distributed Energy
The Journal of Energy Efficiency & Reliability
Please click on the link below
Distributed Energy


Distributed Energy
The Journal of Energy Efficiency & Reliability
P.O. Box 3100
Santa Barbara, CA 93130
Tel. (805) 682-1300

March-April 2009
Volume 7 - No. 2

Bright Ideas
New-and-improved technologies help companies save on energy costs,
make work environments user-friendly, and reduce electrical grid loads.

By Katherine Holden

Controlling Consumption
From Robbinsville, NJ, comes the Lighting Voltage Controller "WattManager," from Magnetic & Transformer Technologies Corporation. The head engineer is Samir Fattohi. Born in Iraq and educated in Germany, he created and patented a simple one-step solution to controlling lighting energy consumption up to 28%, for use with high-intensity discharge (HID) and fluorescent lighting systems. "This is a huge market that has been completely ignored by energy saving retrofits until now," says Fattohi.

The WattManager is clever. HID lamps take from 10-18 minutes to warm up when first turned on. After that, the WattManager's circuitry lowers the voltage flowing from the lighting panel to individual fixtures. "When the lamp gets warm, we reduce the power, and customers save electricity," says Fattohi. "Then, after two or three hours, depending on the age of the lamp, it gains some of the lumens again. We say the brightness dims by 4% to 8%, but it could be 2% to 6%. It's all below the level of human perception. Another good thing is that some people have installed, let's say, a 250-watt lamp that is too big for their needs. With our unit, they can reduce the wattage without changing lamps."

The WattManager controls any ballast-based gaseous discharge lighting system. One WattManager can reduce the energy consumption of 1, 10, 100, or even 400 lighting fixtures, depending on the size of the appliance ordered. "You can measure the savings after 20 minutes from turning on the lights," says Fattohi. Running the lamps at a lower watt power reduces the operating temperature, therefore prolonging the life of the lamps and the ballast "by up to 40%," claims Fattohi.

Fattohi first applied for a patent on his WattManager in May 2004, and he received it six months later. His WattManager works on older fluorescent lamps, such as T-8's and T-12's, but not on the new T-5's. "T-12's account for 80% of the US Market for the last 30 to 40 years, and the T-8 is less than 30 years old," says Fattohi. "In the United States, T-5's are only a few years old, and we're still having trouble with them. We don't have enough experience with them yet."

Vic Avila, Facilities Manager of Maintenance Services-Facilities for the City of Hayward, CA, has WattManagers in two different city parking garages. The first installation involved the retrofit of a 300-car parking garage. The second was part of new construction. "We realized about a 10% to 12% savings in the retrofit," says Avila. "They said we'd have a 15%, but a 10% to 12% savings is still a 10% to 12% savings.

In 2007, we opened another parking lot with about 600,000 square feet that holds 360 cars. So, we have two different generations of WattManagers. I can't say what the savings are in the new lot, because it's always been there." So far the system has worked perfectly, adds Avila. He doesn't recall reaping any rebates, but says, "it's likely that we would today." Learning that the WattManager works beautifully in offices with T-8 fluorescent lamps, Avila remarks, "I'm going to look into it when I get the time."

To read the original article published in the Distributed Energy
The Journal of Energy Efficiency & Reliability
Please click on the link below
Distributed Energy


Energy Conservation For Cleaner Environment

7 Tanager Lane, Robbinsville, NJ 08691, USA *Tel. (609) 371-1258 *info@wattmanager.us