IEC 61225:2025 pdf download,Nuclear power plants – Instrumentation, control and electrical power systems – Requirements for static uninterruptible DC and AC power supply systems.

IEC 61225:2025 outlines the performance and functional characteristics of low voltage static uninterruptible power supply (SUPS) systems specifically designed for use in nuclear power plants (NPPs) and, where applicable, in other nuclear facilities. An uninterruptible power supply (UPS) is a type of electrical equipment that draws energy from a source, stores it, and ensures a continuous supply in a specified format through internal mechanisms to its output terminals. Unlike traditional UPS systems, a SUPS operates without any rotating components, relying instead on static technology to fulfill its functions.

This standard details the performance criteria and functional requirements necessary for the effective operation of SUPS systems within the nuclear sector. It also references specific design requirements for the components of the power supply system, which are governed by IEC standards and other relevant standards cited in the normative references. However, it is important to note that the document does not cover specific design requirements at the component level, as these fall outside its scope.

By establishing these guidelines, IEC 61225:2025 aims to enhance the reliability and safety of power supply systems in nuclear environments, ensuring that critical operations can continue uninterrupted even in the event of power disturbances. This standard is essential for manufacturers, operators, and regulatory bodies involved in the design, implementation, and maintenance of SUPS systems in nuclear facilities.