EN 60947-3 specifies the requirements for switches, disconnectors, switch-disconnectors, and fuse-combination units intended for use in low-voltage circuits. These devices are used primarily for industrial and similar applications, operating at a voltage not exceeding 1,000 V AC or 1,500 V DC. The standard covers performance criteria, operational characteristics, and testing methods to ensure the safety, reliability, and durability of these components under various conditions. It also includes guidelines for their installation, marking, and user information to ensure proper usage and maintenance.