Great interest was aroused by the sixth edition of the Lighting Open Day, which was held online on November 17th. The panel included four current topics which kept the attention of over 80 attendees. In fact, the first part of the morning dealt with the new Guide of the Technical Committee 64 on the “Choice of protections of luminaires for fixed installation” and the Updates on the publication of standards and their harmonisation in the field of EMC and RED Directives.
Instead, in the second part of the day it was given a speech on CEI Guide 34-189 – Guide for the extension of photometric data, and after then followed a topic about the preliminary analysis of the general criteria necessary for a proper lighting design in indoor workplaces, with particular regard to the novelties related to the new edition of the standard, the UNI EN 12464-1:2021 (Lighting of workplaces – Part 1: Indoor workplaces).
In introducing the event, ASSIL mentioned a study commissioned to the Politecnico di Milano, that will investigate all the possible incentives provided by the National Plan of Recovery and Resilience and related not only to energy efficiency issues, but also to improving the quality of life of all people operating inside the buildings. Without forgetting the theme of public lighting. The study will provide a general overview of the Lighting sector and will subsequently focus on various areas of application, including schools, hospitals, public offices, railway stations, ports, cultural and entertainment venues such as cinemas, theatres, museums, up to the entire hospitality sector.
Available from mid-December, the results of this study will then give important indications for “Formazione in Luce” next year’s training activity.
The new Guide of the Technical Committee 64 on the “Choice of protections of luminaires for fixed installation” is intended to provide guidance for the proper design of electrical installations in order to ensure adequate coordination between protective devices and luminaires with LED light sources. In particular, the soon to be published document provides useful information about the overvoltages that may occur on plants and the consequent choice of SPD suitable to ensure the protection of luminaires. The Guide also gives examples on the realization of the systems, useful to limit the risk of malfunctions due to the phenomenon of electrostatic discharges as well as indications regarding the criteria of choice of the circuit breakers so as to avoid sudden shots due to currents of high point.
To follow focus on the novelties introduced in the standard “UNI 10819 Outdoor lighting systems – lighting sizes and calculation procedures for the assessment of the dispersion of the light flux upwards”, as a result of the radical revision of the 1999 edition, with an outline of the methods of calculation and verification prescribed and intended for the assessment of the luminous flux dispersed, coming from the sources of artificial light of the lighting systems in external areas, in various fields of application. A new procedure for the evaluation of parameters for operating signs and advertising systems for the verification of the limits prescribed by various regional regulations has also been presented. The evaluation procedure with the relative calculation method of the intrusive light emitted by the lighting systems, both in public areas and in private areas, completed the picture of the new elements introduced by the 2021 edition as an integration for the lighting project and to assess the adequacy with any national and regional legislative requirements.
The evolution of the products, the increasingly massive use of remote-control technology and the continuous increase in energy efficiency values have led to reconsider some aspects related to the requirements of electromagnetic compatibility of the products. The harmonisation of standards for the purposes of European directives is also an important element in the selection of the most appropriate legislation for the evaluation of products. This topic includes the draft new standard 50705 for the safety assessment of products for the purposes of the RED Directive.
The possibility of varying countless parameters of an LED luminaire makes it virtually impossible to measure directly all the variants placed on the market of the same product. For example, versions of the same device may only differ for the power supply or the CCT, or for the CRI or simply because the LED used has been updated, which presents, under the same conditions, better performance. It is therefore important to be able to derive with certain and shared methods the characteristic data of variants starting from electrical and photometric measurements of the model taken as a basis. The IEC 34-189 Operating Guide answers these needs and explains how to perform the calculations and interpolations necessary for the extension of the measure.
Preliminary analysis of the general criteria necessary for a correct lighting design in indoor workplaces, with particular attention to the novelties related to the new edition of the standard UNI EN 12464-1:2021. In addition to the job aspects, the main requirements and recommendations provided by the new UNI TS 11826 presented, which rework, with an updated approach, what was already contained in the standard UNI 10380 (withdrawn in 2003) and specifically related to domestic environments only. The technical specification also integrates and reworks the indications already present in Appendix N of the technical report CEN/TR 15193-2.
