Low-voltage switchgear and controlgear - Part 6-1: Multiple function equipment; Automatic transfer switching equipment

This document outlines specific technical requirements and test methods for automatic transfer switching equipment used within low-voltage power systems. It is part of a broader series dedicated to low-voltage switchgear and controlgear, focusing specifically on multifunctional devices designed to ensure continuity of supply. The text details the general rules applicable to equipment intended to automatically switch between power sources in the event of a failure or maintenance requirement. Parameters such as making and breaking capacities, short-circuit withstand strengths, and mechanical endurance are addressed to ensure reliability under fault conditions. It covers the constructional requirements necessary for safe operation and specifies the testing procedures that manufacturers must follow to demonstrate compliance. The provisions include guidelines for ratings, insulation properties, and protection against electric shock and thermal effects. This publication serves as a foundational reference for designers, manufacturers, and regulatory bodies involved in the certification and deployment of automatic transfer switches. It aims to harmonize technical criteria to promote safety and interoperability across different market regions without imposing direct performance mandates beyond the defined testing framework.