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October 13th, 2017

APTA EXPO 2017 - the year of the electric bus


Back from APTA 2017 in Atlanta. It was a great event to continue developing existing relationships and forge new ones ...more



September 15th, 2017

REO-USA at the APTA EXPO 2017 in Atlanta, Georgia.


REO-USA is exhibiting at the APTA EXPO 2017 October 9 - 11 2017 in Atlanta, GA.
We are exhibiting our latest technology of Components for Railway applications. ...more



August 29th, 2017

REO-USA at the Corrosion Technology Week (CTW) in Indianapolis, Indiana



REO-USA is participating in the Corrosion Technology Week 2017, September 10-14 2017 ...more



REO-USA - News

► Shock and Awe    

February 8th, 2016

REO-USA reactor aces shock and vibration tests to help Siemens electric drive system boost megaton mine-truck speed

REO-USA has a long history of developing three-phase transformers and air chokes for large mining trucks. They also lead in air chokes for traction applications in the railroad industry where vibration can rattle even the toughest components, providing reactors able to handle it and come back for more.

That experience triggered a design concept which helped them garner an assignment from Siemens Industry Inc., global leader in control systems, for a reactor that blends know-how from both industries: Line chokes for drive systems in mining industry haul trucks - and also, importantly, for use with an overhead trolley.

Winning the Request for Proposal competition, however, was only the beginning.

Large mining truck with air chokes from REO-USA

Mining haul trucks similar to this can move up to 360 'short tons' (720,000 lbs.) of uranium per load. New drive systems from Siemens Industry Inc. incorporate specially designed line choke reactors from REO-USA, which are able to withstand extraordinary vibrations incurred on these applications.




"The REO-USA concept closely matched what the Truck Product Manager, Xiaobin Wang visualized the reactor box to be," says Don Willis, Procurement Manager at Siemens. Wang concurred, noting the traction application for trains is very similar to mining.

"However, it needs to be much more robust," asserts Wang. "Railway vibrations are minimal compared to those generated by Mining Haul Trucks."

Ultra-tough to handle shocks from mega-ton hauls

These are among the industry's larger haul trucks, climbing out of coal, copper, iron ore or other mines with 330- and 360- short ton loads. The world's largest haul truck, which also utilizes Siemens technology, carries 500 short tons - or one million pounds - on every single trip.

The trucks operate in Namibia on Africa's west coast, just below Angola and above South Africa, Botswana is to the east. Here, the mine being developed by Swakop Uranium for nuclear power plants began production in December 2015. It is expected to become the world's second largest uranium mine, with the potential to produce 15 million pounds (7,500 short tons) per year for the next two decades.

No one gets a speeding ticket working this mine - six mph is considered good. Picking up the pace could pay big dividends in volume of ore hauled per day, per week and beyond. In fact, faster hauls are one of Siemens' key goals in seeking new, advanced technology. That's where the trolley system in particular comes in.

...read more



► Think big, build small with confidence

October 28th, 2015

New-generation REOWAVE®passive harmonic filters from REO-USA raise the bar on lowering distortion, expand design options

Good news for manufacturers of equipment going into commercial HVAC installations, pumping stations, wind turbines or anywhere else where harmonics can cause machine malfunctions, excess energy consumption and shorten equipment life. Now engineers can design smaller, less costly and more efficient systems using thyristors or frequency converters and concurrently combat harmonics from these non-linear loads by incorporating REO-USA's new-generation REOWAVE®passive harmonic filters.

REOWAVE®passive harmonic filters

Special housing provides extra protection for a range of REOWAVE®passive filter sizes designed to handle current from 6A to 1200 A.


"Specially designed circuitry enables REOWAVEpassive filters to dramatically limit non-linear power distortion in variable frequency drives (VFDs) and motors," says Alex Ward, Technical Sales Engineer for the Indianapolis, Indiana-based firm. "This gives users greater flexibility to engineer products with higher current ratings as well as less power loss, without rampant harmonic content impeding product performance."

...read more



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