The IEC 61811 Relay standard is a key guideline that ensures the performance, reliability, and safety of relays used in various electrical and control systems. This international standard, developed by the International Electrotechnical Commission (IEC), focuses on the specifications of time-delay relays and other types of relays used in industrial and automation applications. IEC 61811 defines the requirements for relays, particularly those that are time-sensitive, ensuring that they perform reliably and efficiently under diverse conditions.

Overview of IEC 61811 IEC 61811 is a multi-part standard that outlines the general requirements, testing procedures, and performance expectations for relays. The primary focus of the standard is to define how relays operate in terms of their electrical, mechanical, and environmental characteristics, with particular attention given to time-delay functions. The standard aims to ensure that relays can be safely used in industrial control systems, including machinery, electrical circuits, and automation processes, where precise control over the timing of operations is critical. The standard is divided into different sections, each addressing specific aspects of relay design and application: