Information technology - Guidance for the use of database language SQL - Part 10: SQL model (Guide/M...
This document describes the model of database language SQL as defined in ISO/IEC 9075-1, ISO/IEC 9075-2, and ISO/IEC 9075-11. The meanings of and the relationships between various concepts of that model are described in text and illustrated graphically. Background in the form of some historical review and a brief overview of key SQL features is included.
NOTE 2 — In spite of the fact that the…
Environmental testing – Part 2-87: Tests – UV-C exposure of materials and components to simulate ult...
IEC 60068-2-87:2024 describes exposures of materials and components to UV-C radiation during ultraviolet germicidal irradiation (UVGI) treatments or other processes that require UV‑C exposure and test procedures to simulate those environments. Severities representing various frequencies and intensities of UV-C exposures are described. Test conditions are described and limited to devices that…
Essais d'environnement - Partie 2-87: Essais - Exposition des matériaux et composants aux UV-C ...
L'IEC 60068-2-87:2024 décrit les expositions de matériaux et composants aux rayonnements UV-C lors de traitements par irradiation germicide aux ultraviolets (UVGI) ou d'autres processus qui exigent une exposition aux UV‑C, ainsi que les procédures d'essai pour simuler ces environnements. Les sévérités qui représentent différentes fréquences et intensités d'exposition aux UV-C…
Smart cities - Application of IEC SRD 63235 - Concept system building for energy challenge
IEC SRD 63520:2024, which is a Systems Reference Deliverable (SRD), provides the concept system of energy challenges in smart cities, using the methodology framework and development processes in IEC SRD 63235.
This document is applicable to development and improvement of the terms and concepts relevant to energy challenges in smart cities.
As global climate change and energy scarcity become…
Specifications for particular types of winding wires - Part 27-1: Paper tape covered round copper wi...
IEC 60317-27-1:2020+AMD1:2024 CSV specifies the requirements of paper tape covered round copper winding wires. This covering consists of two or more layers of paper tape and is primarily intended for winding coils for oil immersed transformers. The range of nominal conductor diameters covered by this document is:
– 0,500 mm up to and including 5,000 mm.
The nominal conductor diameters are…
Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC - Equipment fo...
IEC 61557-1:2019+AMD1:2024 CSV specifies the general requirements applicable to measuring and monitoring equipment for testing the electrical safety in low-voltage distribution systems with nominal voltages up to 1 000 V AC and 1 500 V DC. When measuring equipment or measuring installations involve measurement tasks of various measuring equipment covered by this series of standards, then the part…
