Cover story Power decentralisation made easy
Kamil Buczek, Product Manager Rugged Products, Sebastian Lederer, New Product and Application Engineer, and Maximilian Hülsebusch, Marketing Communications Specialist from PULS consider design techniques for achieving optimised power decentralisation.
T
he demand for fl exible, modular systems is shaping the world of automation, control and machine building.
Decentralisation of system components has proven to be an important factor in this growing trend. It speeds up the system planning process, simplifi es installation and maintenance and facilitates future expansion. For many system builders and
installers, the power supply has been an obstacle on the path to consistent decentralisation. In particular, where functions such as selective current distribution, protection and condition monitoring need to be implemented whilst providing maximum reliability and uptime.
Decentralised power supply To meet the challenges in achieving a decentralised power supply, an obvious solution is to design a system that can be mounted directly onto a machine
Figure 1: Decentralised power supplies by PULS
or installation. The power supply and other standard components such as electronic fuses, communication terminals, distributor blocks or switches are relocated from the central control cabinet to smaller enclosures directly in the fi eld. The installation of these components outside of a fully environmentally- protected central cabinet means they will require a high IP rating individually, to ensure protection against dust and moisture. Providing protection to class IP54, IP65 or IP67 may be required, depending on the application. The result will be a small, decentralised on-site cabinet for which the individual components have to be selected, ordered, stored, assembled and installed, which is a time-consuming and complex task. In most cases there is very little space available on a machine to locate a control system, so fi nding a location for this cabinet can be
problematic. Engineers often must be creative, positioning the cabinets above or below the system making access sometimes difficult for installation and service technicians. However, compact all-in-one solutions for decentralised applications are available, such as those from Puls. Its FIEPOS Field power supply family is based on a modular platform developed specifi cally for use outside of a cabinet. All models are based on either 1-phase or 3-phase input power, with either a 300W or 500W output rating. All devices in the FIEPOS family
provide 120% power continuously (up to 45°C) and 200% for 5s, making them suitable loads with a demanding start-up cycle. With a housing size of only 182 x 183 x 57mm (W x H x D), they can be installed even in applications where space is at a premium. The units can be mounted via DIN-rail or in place using a variety of mounting holes.
06 July/August 2023
www.electronicsworld.co.ukw
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