DC-Link chokes N CNW 891
Single-phase DC link choke (1 conductor) Description Compact & Efficient Reduce mains interference – save energy costs. The DC link choke is used to smooth the DC link current and reduce mains feedback in voltage DC link converters. The typical combinations of rectifiers and capacitors place a considerable load on the supply network. Due to its function, the current consumption of the power supplies or converters is not sinusoidal, but pulse-shaped at the moment of the voltage maximum. DC link chokes reduce the harmonics and relieve the supply network in a similar way to the mains choke. In addition, the DC link choke dampens the charging current peaks of the DC link capacitors. A DC link choke reduces the burden on the supply network with harmonic reactive power. Improvement of the efficiency of a converter (Power Factor Correction). Inrush currents and current peaks are damped by up to 70%. Mains chokes help to comply with the international PowerQuality standards IEEE 519 or EN 61000-3-2. Typical application Drive technology for motor drives, e.g. mechanical engineering, elevators, escalators, pumps, conveyor technology, ventilation and air conditioning, robotics, automation technology, power supplies, wind turbines Advantages Reduction of harmonic overtones Damping of current peaks up to 70% compact design Advantages compared to the mains choke: smaller size lower material costs / price lower power dissipation Production according to UL insulation system E251513 possible Technical data Nominal voltage: U ≤ 600 V According to: EN 60289 / EN 61558 Test voltage: L-PE 4000 V, AC/50Hz, 60s Insulation class: T40/F Protection class: IP00 Climate category: DIN IEC 60068-1 Overload: 1.5 x INominal 1 min / h Design: standing on foot bracket Technical data Type Nominal voltage U [V] Nominal current [A] Inductance [mH] Power dissipation [W] Mass [kg] Mass Cu [kg] N CNW 891 / 8 600 50 / 60 Hz 8 9,4 14 1,4 0,3 N CNW 891 /11 600 50 / 60 Hz 11 6,2 15 2 0,3 N CNW 891 / 15 600 50 / 60 Hz 15 4,8 20 2,8 0,6 N CNW 891 / 20 800 50 / 60 Hz 20 3,3 19 3,6 0,6 N CNW 891 /28 800 50 / 60 Hz 28 2,4 22 3,6 0,8 N CNW 891 / 34 800 50 / 60 Hz 34 2,0 29 4,5 0,8 N CNW 891 / 40 800 50 / 60 Hz 40 1,6 31 7 1 N CNW 891 / 55 800 50 / 60 Hz 55 1,2 43 8 1,2 N CNW 891 / 70 800 50 / 60 Hz 70 0,98 49 10,5 1,4 N CNW 891 / 85 800 50 / 60 Hz 85 0,81 60 13,6 1,8 N CNW 891 / 100 800 50 / 60 Hz 100 0,67 70 14 2,5 Dimensions in mm Type Length L1 (mm) Width B1 (mm) Width B2 (mm) Height max. H (mm) Mounting N1 (mm) Mounting N2 (mm) Mounting D1 (mm x mm) Connection terminal/ cable lug [mm²] PE connection Connection A1 (mm) Image N CNW 891 / 8 84 76 62 80 64 48 5 x 8 2,5 Flat connector 6.3 x 0.8 1 N CNW 891 /11 84 90 76 80 64 62 5 x 8 2,5 Flat connector 6.3 x 0.8 1 N CNW 891 / 15 96 95 88 85 84 72 6 x 11 2,5 Flat connector 6.3 x 0.8 1 N CNW 891 / 20 96 138 102 85 84 85 6 x 11 10 (m5) M5 40 2 N CNW 891 /28 96 138 102 85 84 85 6 x 11 16 (M5) M5 40 2 N CNW 891 / 34 105 138 105 95 84 87 6 x 11 16 (M5) M5 40 2 N CNW 891 / 40 120 155 120 105 90 105 6 x 11 16 (M5) M6 45 2 N CNW 891 / 55 150 138,5 107,5 135 122 87,5 7 x 13 16 (M5) M6 45 2 N CNW 891 / 70 150 159 124,5 135 122 104,5 7 x 13 25 (M8) M6 45 2 N CNW 891 / 85 150 185,5 150,5 135 122 130,5 7 x 13 25 (M8) M6 45 2 N CNW 891 / 100 174 162,5 121 150 135 101 7 x 13 35 (M8) M8 50 2 Datasheet All data and configurations can be found in our product datasheet. Download Datasheet Certifications
REO AG Continues Tradition as a Sponsor within the Framework of the Deutschlandstipendium (Germany Scholarship)
For 7 years now, REO AG has been supporting qualified and talented students with a Deutschlandstipendium.
Isolating transformers for medical technology – ed 3.2
REO AG has successfully completed certification for the new 3.2 edition of its REOMED isolating transformers. This certification will be mandatory from October 2024 and underlines the quality and reliability of the REOMED series, which was specially developed for medical technology. The REOMED series of isolating transformers offer the highest levels of safety and reliability, which are essential for use in medical devices. These transformers are used in a wide range of medical applications worldwide, from hospital equipment to complex medical imaging systems. The REOMED transformers are characterised by their excellent insulation capability and low electromagnetic interference, which ensures safe and reliable operation. One example of the products in this series is the REOMED 2200, which is unique with its nominal output power of 2200 VA and represents a unique selling point. The REOMED 2200 stands out due to its compact design and high efficiency. Thanks to REO AG’s many years of experience and technical expertise, this isolating transformer offers improved voltage stability and optimised heat dissipation, resulting in an extended service life and increased operational reliability. With the successful testing of the 3.2 edition, REOMED isolating transformers are ideally prepared for the future requirements of the market. This certification shows that REO AG continues to offer reliable and safe solutions for the medical technology sector.
Mechanical Engineering Network Bergisch Land
The Mechanical Engineering Network Bergisch Land is an association of companies, individuals, and public authorities. Its purpose is to strengthen the mechanical engineering industry in the economic region of the Bergisch City Triangle to secure competitiveness, locations, and employment. The currently more than thirty-five members – small and large companies, institutions, and educational service providers – can exchange ideas and information in various ways on this platform. In addition to the network-promoted interaction between companies and the transfer of knowledge between industry and research, the skilled labor situation is also among the central topics. REO AG is now pleased to be part of this network. As part of the first network meeting with REO AG, board member Mr. Jörg Rohden participated in the excursion to the Machine Tool Laboratory WZL Smart Automation Lab at RWTH Aachen University. The Smart Automation Lab focuses on the continuous improvement of production processes to increase productivity, enhance flexibility, and reduce resource consumption. The Automation and Control Technology department showcased applications and projects on topics such as smart robotics, artificial intelligence in production processes, and collaborative assembly of small parts, using numerous demonstrators. A very exciting look at the state of the art and an outlook on what we can expect in the future.
REO DC Chokes in New Berlin U-Bahn Trains
The unveiling of Stadler’s new JK series subway train marks a significant step in the development of the Berlin rail network. Compared to the trains that are over three decades old, the new train represents a leap into a new technological age. While there are hardly any noteworthy differences on the outside, the JK series impresses with a wealth of innovations on the inside. An improved sense of space, more generous space for standing passengers, and vertical grab bars that make gripping ceiling bars unnecessary are just some of the highlights. The angled grab bars also make it easier for wheelchair users to pass through the aisles. In addition, space-saving screens and an integrated size indication on the signs indicating spaces for the severely disabled are part of the modernized interior. The first test cars have been rolling through the Berlin subway network since January, before being used for the first time in regular passenger service from late summer 2024. The introduction of this new subway train series represents a significant advance in railway technology and lays the foundation for further innovations in the future. Technological advancement is driven by the collaboration between REO TPM and its customer, ABB. Together, a special DC grid Drossel was developed at the end of 2021 to be integrated into the new subway cars. As an essential component of the drive train, this Drossel provides important protection against circuit-related current peaks and reduces harmful mains feedback. A special feature of the DC grid Drossel is its EMC compliance, which is ensured by surrounding the Drossel with thick iron sheets. This ensures that electromagnetic interference is reduced to a minimum, which in turn increases the safety and reliability of the subway operation.
High Current Transformers for Resistance Welding
High Current Transformers for Resistance Welding UK-born engineer Elihu Thomson discovered in 1876 that copper could be fused together, but it wasn’t until 1885 that a resistance welding process was proposed. Direct energy spot welding is a resistance welding process that joins metals by applying pressure while simultaneously supplying electrical current to the weld area. Resistance spot welding has evolved into a fast and cost-effective welding method widely used in sheet metal fabrication. The automotive sector has benefited from this technique through the use of spot welding robots, enabling higher production and assembly speeds. Although this technique is primarily used for welding steel, there is an increasing trend to substitute steel with aluminum to achieve mass optimization over time. The market is estimated to reach nearly $500 million by 2031. Power Supply in Welding Spot welding machines typically operate with AC voltage. The specific power for a given welding application is determined by process development and optimization based on material properties, desired weld quality, material thickness, and speed requirements. The heart of the welding machine’s power supply is a high-current transformer, designed for the maximum power and load that can be expected for the application. REO’s RFT-HS toroidal transformers use multiple toroidal cores to achieve the required power. The units have a standard wired input and use a copper busbar as the secondary side. The toroidal design can be up to 40% more efficient than conventional EI transformers, which is crucial in price-sensitive applications. REO’s toroidal transformers offer further advantages: they can be encapsulated to achieve an ingress protection (IP) rating of up to IP20, and the REO design allows for quick assembly in devices or control cabinets, saving time and thus money. They have been specifically developed to outperform standard EI transformers and offer lower losses. Applications of Spot Welding Automotive Industry As mentioned, spot welding is a key component of the automotive industry due to its cost-effectiveness, reliability, and speed. Manufacturing companies can easily automate assembly lines by using spot welding robots. A sheet metal or pressed panel made of steel or aluminum can be transformed into a functional part in seconds. Electronics Since this welding process prevents overheating of electronic components, many components such as switches, potentiometers, relays, circuit boards, and batteries are well-suited for spot welding. Nail Manufacturing This is a continuous high-speed spot welding process that converts carbon steel coils into thousands of nails per minute. Kitchen Appliances Spot welding is commonly used to manufacture door and cabinet handles, spatulas, and certain kitchen utensils like cookie cutters. Medical Industry The medical industry also benefits from the welding quality and speed of this process. In orthodontics, for example, spot welding is used for the secure attachment of dental implants. Advantages of Spot Welding Spot welding is considered one of the fastest and cleanest welding methods. The process is easy to understand. Unlike other methods such as arc or TIG welding, there is no open flame. The process is easily automated. Multiple workpieces can be joined simultaneously. No use of filler materials required. There is no need for the use of shielding gases. Disadvantages of Spot Welding Workpiece alignment and pressure are critical. Spot welding can cause deformation in some areas of the base metal. It is generally not possible to weld material thicknesses greater than 3 mm. The joints produced can be weaker than with some other welding methods. The welding current can be diverted (shunted) from the electrodes to other welds on the workpiece, leading to poor welding performance. As the optimization of production techniques continues, especially with the increasing use of aluminum in automotive and aircraft production, making products lighter and more fuel-efficient, resistance welding is likely to remain an important manufacturing process for many years to come.
REO AG at the SPS in Nuremberg
After a long break, we are looking forward to personal and exciting conversations with you at SPS 2022 in Nuremberg. Get to know our new and forward-looking chokes and EMC filter series. Talk to us about our new production methods – all in the spirit of sustainable energy and reduced CO2 emissions. In addition to developments in drive technology, you can also expect many new innovations in vibration conveyor technology. Together with REO Digital Connect 4.0, we will present our latest innovations to you. Meet us at SPS 2022 in Hall 4 – Stand 148 from November 8 – 10, 2022 and join us in starting the future together. (Image: Mesago Messe Frankfurt GmbH / Malte Kirchner)
VISIT REO AT INNOTRANS 2022
REO welcomes you under the motto HEAVYDUTY at Innotrans 2022! The Executive Board of REO AG and the division managers of the exhibiting departments today inaugurated the new exhibition stand at Innotrans 2022. In a modern design and with an appealing form language, the exhibition stand not only attracts attention, but also invites visitors to linger. Numerous exhibits, films and accompanying readings will give you a comprehensive insight into the world of REO. We look forward to your visit, interesting discussions and a lively exchange of ideas. You will find us in hall 17, booth 125
REO AG Launches Product Finder for Braking Resistors
REO AG launches an innovative power calculator with an integrated product finder at reohm.de. With the help of the new website, interested parties can quickly find the required nominal power, as well as the optimal REO product for their application through specific queries. When searching for a suitable braking resistor, developers repeatedly face the same questions: How do I correctly dimension the resistor? What continuous power do I need for cyclic operation with a specific duty cycle? How can I optimally design my resistor? The REO AG power calculator with integrated product finder offers solutions for this. On the website www.reohm.de, specially developed for this purpose, interested parties without technical background knowledge can find the right resistor in the shortest possible time. In addition to real-time power calculation, the optimal product for their requirements is directly suggested to the interested party, which reduces long consultation times or delays in product selection to a minimum. “In practice, it is repeatedly shown that customers use significantly oversized or, which is relevant for application safety, undersized braking resistors.”, notes product developer and board member Sven Reimann. With the help of reohm.de, interested parties can now calculate or enter the appropriate resistance or ohm value and the corresponding continuous power, and will be suggested the corresponding REO product. This can then be directly requested from the site. The product finder is suitable for compact resistors, air and liquid-cooled resistors, damping and charging resistors, and resistors for aggressive environments. Furthermore, individual special solutions are also available for interested parties to view. REO AG offers further calculations through a specification sheet specially developed for this purpose. The respective specialist department carries out the detailed calculations and contacts the interested party. With the new online offering, REO AG consistently drives innovations forward and clearly presents new technological concepts of various novel products to the market.
For Special Achievements in Physics: REO AG Awards the Physikus Prize
For the eleventh time in a row, REO AG is awarding the Physikus Prize for four extraordinary achievements in physics. The award winners were honored at the Schwertstraße Gymnasium in Solingen as part of the annual graduation ceremony. The Physikus Prize, which comes with a total prize money of 2,350 euros, is being awarded for the eleventh time to high school graduates of the Schwertstraße Gymnasium in Solingen. Extraordinary achievements in the physics advanced course are honored. “With our Physikus Prize, we inspire young people to get excited about the fascinating world of physics and make a major contribution to the future generation of researchers”, Jasminka Usein, member of the Management Board, summarizes the background of the Physikus Prize. The lucky winners of the REO Physikus Prize are delighted to receive prize money. The first prize is endowed with 1,000 euros, the second with 750 euros and the third with 300 euros. In addition to the prize money, all four prize winners also receive a certificate. With the presentation of the Physikus Prize, REO AG is committed to supporting local young talent at its headquarters in Solingen. As a global manufacturer of electrotechnical components and electronic devices, REO AG is also dependent on young, junior specialists and would like to maintain the interest of young people from Solingen in physics, mathematics and engineering in this way. The prize will also be awarded again in 2020 at the Schwertstraße Gymnasium in Solingen.