IEC 61225:2005

FOREWORD
0 Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 System requirements
   4.1 Function and description
   4.2 System divisions
   4.3 System boundaries
5 Requirements for redundancy, physical separation,
   and independence
   5.1 General
   5.2 Redundancy
   5.3 Physical separation
   5.4 Independence
   5.5 Reliability
6 Functional requirements for I&C power supplies
   6.1 Power supplies for I&C systems important to safety
   6.2 Batteries and chargers
   6.3 Inverters and converters
7 Requirements for distribution system design
   7.1 System aspects
   7.2 Load allocation
   7.3 Electrical aspects
8 Effects of loads on supply quality
   8.1 Electromagnetic interference
   8.2 Transients
   8.3 Load current
   8.4 Safety loads and non-safety loads
9 Characteristics of supplies given to individual loads
   9.1 DC supplies
   9.2 AC supplies
10 Monitoring and protection
   10.1 Monitoring
   10.2 Protection
11 Qualification of equipment
12 Testing
13 Maintenance
Annex A (informative) Examples of specifications

Specifies the performance and the functional characteristics of the electrical supply systems required for the instrumentation and control (I&C) systems important to safety of a nuclear power plant. Gives also guidance on the possible use of these supplies for other I&C systems. Defines the methods of application of the relevant IAEA Safety Guide NS-G-1.3.