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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

► Anchoring Spiraling Cable Costs

June 18th, 2014

CNW 933 Sinusoidal Wave Filter overcomes interference problems and other issues

The cost of cables is rising in manufacturing as the result of the need for lengthy shielded cable to tackle attenuation and electromagnetic compatibility (EMC) issues. Compounded by increasing commodity prices, this is leading many original equipment manufacturers (OEMs) to look for cost effective solutions. OEMs can anchor spiraling cable costs by using REO-USA sine wave filters.
comparing with/without sinusoidal filter
The REO sinusoidal filter converts the distorted voltage waveform from the frequency inverter into a smooth sinusoidal curve. In particular the ripple caused by the fast switching of the power semiconductors is smoothed, typically down to 3-5%. When used in conjunction with a screened cable, this type of filter will remove most symmetric and asymmetric noise, except in extreme cases.

The demand for cable lengths in industrial environments can be high. Variable speed devices (VSDs) and long cable runs over 165 feet between the VSD and the motor are common, but can conspire to create further electrical interference.

Three phase induction motor control has been greatly enhanced in recent years by the use of VSDs. The rotary speed of the induction motor can be easily manipulated by altering the frequency of the supply current. The result is a fixed voltage, variable frequency output. Although the benefit of the VSD is to lower cost by increasing efficiency, the process has some drawbacks.

Pulse with modulation (PWM), the process used to switch the VSD inverter typically between 8-16 kHz, produces a series of output pulses that average to a sine wave. The power conversion process creates unwanted frequency components such as harmonic currents which, in substantive quantities, can lead to electromagnetic interference (EMI).

The degradation caused by EMI can be significant and varied, wearing down the ability of components to operate at optimal performance and potentially even lead to machine failure. The damage ranges from overheating transformers, windings and capacitors, to interference affecting telecommunication equipment and metering apparatus. more

► The newest, certified safety-compliant power with an energy-saving edge from REO-USA

June 3rd, 2014

REOMED 3rd Edition isolation transformers exceed latest IEC 60601-1:2005 and UL 2601 standards while reducing energy losses nearly 50% or more

Compromising safety is never a good idea, especially when patients and practitioners as well as costly medical equipment may be at risk. That's why the International Electrotechnical Commission amended IEC 60601-1:2005 (3rd Edition), broadening the standard to include a wide range of home health care and point-of-use medical devices.
REOMED 1000 medical isolation transformerREOMED 3rd edition - Available in a wide range of standard isolation transformer power capacity options with up to 9 outlets

It's also why REO-USA has certified its REOMED line of medical isolation transformers to comply with IEC 60601-1:2005 (3rd Edition), as well as the UL 2601 standards for safe use in medical applications.

"Leakage is the critical safety issue," says Rick Jones, Sr. Director of Engineering for the Indianapolis, Indiana-based firm. "Leakage of electrical current during applications of electro-medical technologies creates a hazard for patients and practitioners alike."

"A small amount of current can cause a large amount of damage in medical applications. And most medical examination as well as surgical procedures today involves electricity, from body scanning and electrocardiograms (EKG) to dental treatment."

Exceeding safety standards while delivering a huge efficiency edge

IEC 60601-1:2005 (3rd Edition) and subsequent amendments establish global standards designed to ensure risk-free operation. According to Jones, REO-USA's REOMED 3rd Edition and REOMED II isolation transformers not only conform to the latest standards, but exceed them by a large margin.

"IEC 60601 calls for leakage to be under 1000 microamps (μA)," Jones says. "REOMED 3rd Edition transformers are less than 500 μA, providing more than twice the required safety margin. And REOMED II units are more than 10 times lower: less than 100 μA."

Jones says that, while some American companies are working towards complying with the IEC and equivalent UL standard, growing awareness of safety issues may make certified compliance a must as electrical medical devices continue to proliferate. "Why risk dangers that can be readily avoided, when standards have been set - and met - by firms such as REO-USA?"

Energy efficiency, however, is where medical equipment manufacturers often look for an edge. This is another area, Jones contends, where REOMED isolation transformers also shine.
comparing REOMED toroidal transformer performance with conventional transformer
Far more efficient, far less loss of energy is evident when comparing REOMED toroidal transformer performance with conventional transformer designs.

"Our toroidal core transformers reduce energy losses to about half the loss incurred with conventional transformers, at every power capacity level. The symmetry of our design, which constrains virtually of the magnetic field to the core, plus the quality of material we use, contributes to the high efficiency these transformers deliver." more

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