General requirements for differential (residual) current operated protective devices

This standard outlines the general requirements for residual current operated protective devices. It specifies the performance, testing, and marking criteria to ensure the proper functioning and safety of such equipment. The document covers essential aspects including electrical characteristics, mechanical durability, and environmental resistance. It also defines the conditions under which these devices should operate effectively. The standard provides detailed guidelines for manufacturers and users to follow in order to meet the necessary safety and performance standards. Additionally, it includes information on the classification and application of these protective devices in various electrical systems. The content is structured to facilitate compliance and ensure consistent quality across different products.