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April 11th, 2017

Corrosion 2017 New Orleans - A Success

REO USA was proud to display the next generation technology for Cathodic Protection ...more

February 28th, 2017

REO-USA at Corrosion 2017 - Conference & Expo

Please visit our booth at CORROSION 2017, March 26-30 in New Orleans, Louisiana. ...more

February 1st, 2017

REO AG all set to exhibit at MIDDLE EAST ELECTRICYTY Dubai

Visit us at the MIDDLE EAST ELECTRICITY, Feb 14 - 16 2017 at the at the Dubai World Trade Center, UAE - Hall H3, Booth H10. ...more

REO-USA - News

► REO-USA CNW 903 and CNW 905 Line Reactors provide key performance and market advantages

July 8th, 2014

Patented technology and an inductance edge can deliver documented ROI

REO-USA has a pair of line reactors that other manufacturers can't match. Like many in the marketplace, the CNW 903 and CNW 905 address voltage and current issues and attenuate harmonics in variable frequency drive (VFD) systems, helping to extend VFD and motor service life. But the company and its parent corporation have gone the extra step for OEM prospects, panel builders and system integrators.

3-phase line filter CNW 903
Payback in 5 weeks ~$1,000 1st-year energy savings: Not bad for a single REO-USA CNW 903 Line Reactor on a 4kW VFD, with more savings year after year while the reactor combats voltage spikes and current issues.

Whether incoming facility power sources are nearby or relatively distant, REO-USA line reactors do more than parrot their counterparts. They can pay big dividends, including energy savings, based on measuring what happens in actual installations. In a typical example, energy savings with a CNW 903 line reactor on a 4kW VFD paid for itself in less than five weeks, achieving savings of nearly $1,000 for the first year alone.

"In an industry where precious little down-line data exists on actual application ROI, it's not about how much it costs up-front. It's how much it pays long-term," remarked REO-USA Technical Sales Engineer Alex Ward. "Whether such savings with your own VFD installations are higher or lower, they keep accumulating year after year and that's the difference with our line reactors."

The first line of defense in the component chain, line reactor performance affects all components thereafter. Indicative of the commoditized approach common in the industry, however, many manufacturers' line reactors and load reactors are exactly the same product, right down to the part numbers. Flip a coin and it's either "line" or "load", but not so with REO-USA says Ward.

"We make line and load reactors differently. We put more carefully selected 'build' material into our 3-phase line reactors, providing more inductance per phase," revealed Ward. "They're specifically designed to more effectively handle line-side voltage and current issues, reduce harmonic ripple and minimize distortion from EMI (electromagnetic interference)." more

► 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

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