Laboratory power supply!

REO  has refreshed its REOLINE range of portable power supplies for laboratory, test and factory applications. The range provides an adjustable low-loss output voltage, integrated short-circuit protection and does not generate electromagnetic interference (EMI), ensuring that the power supply is consistent and reliable.

REOLINE allows for stepless adjustment of voltage from absolute zero to maximum output. Each unit is robust in design and able to operate under high inrush currents, as well as withstand sustained overloads, without a detrimental impact on overall performance.

In the test and research industry, it is vital that output voltage can be accurately adjusted and monitored to prevent unreliable results. The toroidal transformers used in REOLINE are stepless, meaning that the output can be adjusted to every voltage within the model’s range. This allows input voltage limitations to be measured more precisely.

“Research labs and test departments simply cannot operate effectively without variable voltage,” explained Steve Hughes, managing director of REO UK. “Reliability is vital to avoid falsified results. Inaccuracies can lead unsafe and improper power ratings.

“For example, a quality assurance department must be able to test at a variety of clearly defined voltages. This allows for correct measurement of minimum and maximum input voltages of a given piece of equipment, without which reliable parameters cannot be set. Without that accuracy, equipment may be subject to insufficient testing and incorrect rating — causing problems for end users after it enters the market.”

REOLINE makes use of REO’s REOVAR range of variable transformers for test and measurement facilities. This means that the REOLINE units are able to offer protection from power quality problems that arise in the sector, such as semiconductor switching noise. Electrical noise can reduce equipment electrical efficiency, as well as unpredictable current fluctuations.

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The REOLINE range is available in a number of versions, with a choice of alternating current (AC) or direct current (DC) models to meet the electrical requirements of any facility. AC models offer a max output voltage of 200V, while DC models provide up to 250V. Engineers can also specify whether they want digital or analogue products, as well as separate or auto-windings.

Each model is designed to be easily implemented into existing test facilities, often on benchtops for ease of access and use. REO UK also offers engineers the opportunity to modify products, with isolated outputs as well as current-monitoring meters, to deliver the specific power needs of their application.

Flexible range of current transformers.

REO has launched a new range of current transformers designed to ensure high power efficiency and quality by offering highly accurate linear current sensing and electricity metering. These transformers come in a selection of power ranges to suit industry sectors including automation, railway engineering and renewable energy.

As electrical control systems get faster, they become responsible for higher currents and frequencies. This is driving demand for current transformers that can provide precise measurement even at these increased levels of operation and regardless of current type.

To meet this demand, REO’s range of current transformers are able to accurately measure currents up to 3000A and frequencies up to 150kHz while providing superior linearity and overcurrent protection. Each series of transformers is designed to deliver reliable power quality catering to a specific industrial sector; for example, the series IE is ideal for use under high currents in the rail sector.

Depending on the application in which it is being used, there are different electrical expectations for each current transformer. As an increasing number of electronic devices begin to operate on higher working frequencies, applications that involve such devices will require a current transformer with an extended frequency range, such as REO’s IN series of instrument transformers.

“As they are used in a wide range of applications it is essential that current transformers offer versatility,” explained Steve Hughes, managing director of REO UK. “Both in terms of technical and mechanical properties, a current transformer must be a perfect fit for a circuit before it can benefit the application.

“Housing and termination casing can be just as important to an application as the electrical characteristics of the transformer itself. Finding a product with the ideal frequency range isn't beneficial if it lacks suitable connections and fittings to be successfully implemented into a specific system.”

To ensure that companies get the best power quality solution, REO UK also offers a bespoke design service to develop application specific transformers. These transformers are designed and manufactured to be used in a specific system, allowing for optimal performance.

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New range of 5-limb chokes target EMC problems.

A new range of 5-limb chokes targeting electromagnetic interference (EMI) problems in industrial applications has been launched by REO. The CNW range is available in two variants, the liquid cooled series-835 motor choke and the series-915 three-phase line choke. Offering a 40 per cent weight and volume reduction on previous models, the new CNW range features high thermal dissipation and a maximum current rating of 1200 A.

CNW MD 835

The recent rise of non-linear loads such as variable speed drives (VSDs), used to improve efficiency and energy savings, has caused an increase in electromagnetic interference (EMI) and as facilities have grown, so has the tendency for longer cable runs. These issues have led to problems such as overheating windings, harmonic currents and voltage distortion, resulting in shorter product lifetimes and fines.

The new CNW series dampens current peaks and voltage drops on the network caused by high frequency switching, smoothing the waveform and providing a clean sinusoidal current output.

"The 5-limb design of these new chokes is pivotal in tackling EMI," explained Steve Hughes, managing director of REO UK. "The design uses a combination of wound and unwound limbs to ensure that the choke can transfer and attenuate the EMI without unwanted thermal loading, which, if not dealt with, can lead to magnetic field leakage and cause common-mode and radio frequency interference (RFI) on nearby equipment.

"On top of this, we've optimised the design to remove excess material, resulting in a choke that is 40 per cent lighter and more compact than a typical setup with three separate single chokes. For use in motors the CNW series-835 also gains the use of liquid cooling for ultimate heat dissipation."

The new range of 5-limb chokes is part of REO's drive to make a complete and high-performance range of electromagnetically compatible (EMC) products available for applications ranging from industrial automation, food and beverage processing and packaging.