No Preview

E DIN IEC 61888 VDE 0491-4-1:2026-02

Nuclear power plants

Instrumentation important to safety – Determination and maintenance of trip setpoints

(IEC 45A/1625/CDV:2025); Text in German and English
Class/Status: Draft, valid
Released: 2026 -02   Published: 2026-01 -16
VDE Art. No.: 1400619
End of objection deadline: 2026-03-16

Note: You can pre-order this document (delivery subject to availability). Valid from 2026-02-01.

This document defines the requirements for assuring that automatic setpoints for nuclear safety system instrumentation, are established and maintained within specified limits in nuclear power plants and nuclear reactor facilities. This document addresses known contributing errors in the channel from the process (including the primary element and sensor) through to and including the final setpoint device. This document applies to the determination of setpoints used for automatic actions. The recommendations may also be used to determine indicator uncertainties for testing or operator decisions.