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  • VIEWS & OPINION: more >>

  • LIGHTING: more >>

    • Quantum dot lighting offers new opportunities for low energy lighting systems

      by Mike Rycroft: EE Publishers

      LED lighting has advanced considerably in the past few years, but still has problems with the quality of light produced and lighting device control. Quantum dot (QD) technology offers a solution to many of the problems with current LED lighting products. This technology was initially applied to luminous displays and television (video) screens but is […]

    • How to measure thermal resistance of LED emitters and arrays Part 2

      Information from Lumileds

      The process used to determine thermal resistance values from the LED junction-to-case and LED junction to Ts reference point. Part 1 of this article discusses measuring junction-to-case thermal resistance; determining the K-factor and testing Rth J-C (see Vector, March 2019, page 25). Thermal performance is the most critical aspect of a well-designed LED lighting system. […]

    • How to measure thermal resistance of LED emitters and arrays: Part 1

      Information from Lumileds

      The process used to determine thermal resistance values from the LED junction to case and LED junction to Ts reference point. Thermal performance is the most critical aspect of a well-designed LED lighting system. Lighting installations with proper thermal designs have higher efficacy, meaning more light can be extracted using less energy, providing better long-term […]

  • SWITCHGEAR & DRIVES: more >>

    • Copper rotor motors and energy efficiency: a case study

      Electrical losses in AC induction motors can be reduced by adding more copper to the stator windings. NYCO Minerals produces wollastonite, a form of calcium silicate used widely in industrial applications such as reinforcing filler in injection-molded plastics. The company’s USA operations are headquartered in Willsboro, New York, where it mines and processes approximately 100 […]

    • What currents tell us about vibrations

      by James Ottewill, ABB Poland

      Valuable condition monitoring data, relevant for an entire drive-train, can be unlocked using electrical signals in motors. Advances in sensing, connectivity, cloud and computing technologies are driving the digitisation of industry at an ever-increasing rate. Add analytics algorithms to the mix and customers can extract considerable additional value from their devices, systems and plants. Digitisation […]

    • Defining short-circuit values for circuit breakers

      by Joachim Becker, ABB

      Power distribution requires distribution switchgear to protect installations but “short-circuit current” often varies. Distribution switchgear is needed to deliver electrical power safely to the end-user. Such switchgear and distribution boards must be designed to protect the installation by interrupting faulty circuits and guaranteeing continued operation for non-affected circuits. Breaker types Short-circuits place equipment under great […]

  • MECHANICAL TECHNOLOGY: more >>

    • Measurement parameters for burner and boiler systems

      Information from Testo

      This article discusses influencing factors and measurement parameters for burner and boiler systems and their importance for optimising efficiency and emissions. Boiler systems provide the necessary thermal energy for power generation, the heating of buildings, cement and glass manufacture and many other industrial applications. With fuels such as coal, oil or gas, boilers are capable […]

    • Using waste heat to generate baseload power

      by Johan Enslin, Heat Recovery Micro Systems

      A new power generation technology could provide baseload power while reducing CO2 emissions. Many countries have accepted the United Nations Framework Convention on Climate Change (UNFCCC) Paris Agreement on mitigating climate change. The agreement, which came into force on 4 November 2016, seeks to strengthen the global response to the threat of climate change by […]

    • Bearing and seal design considerations for tunnel boring machines

      Information from SKF

      The safe, reliable operation of tunnel boring equipment relies on the integrity of critical bearings and seals. Once construction starts, there’s no going back. A tunnel boring machine (TBM) is not equipped with a reverse gear, so it is imperative that the machine is able to complete its job without suffering any significant mechanical failure […]

  • INSTALLATION & CONTRACTING: more >>

    • Safety for cable networks, remote and sound signals and interactive services

      Information from DEHN

      Where antennas are installed, IEC 60728-11 calls for earthing measures in addition to bonding of the cable network. Conventional satellite and terrestrial antennas are almost exclusively installed on the roofs of buildings. Therefore, the IEC 60728-11 (EN 60728-1) standard calls for earthing measures in addition to equipotential bonding and lightning equipotential bonding of the cable […]

    • Parking and charging management for electro-mobility

      by Thorsten Temme, Phoenix Contact

      The challenge behind Germany’s largest electric filling station was to integrate 50 charging points into a parking garage with specific structural conditions and to supply it with PV power. Increasingly more companies in Germany want to electrify their vehicle fleets. Bechtle, the country’s largest IT systems house, has incorporated the issue into its sustainability strategy. […]

    • Monitoring surge protection devices intelligently

      by Holger Heckler, Phoenix Contact Germany

      The options available for monitoring and inspection of surge protective devices. The status of surge protective devices is transmitted and evaluated throughout the system or between systems to able these devices to react quickly to overloads or failures. Sensitive electronic devices are increasingly being installed in areas where high system availability is required. Surge protective […]