Standards

During the last few years , all major wind turbine manufacture have made desiccated efforts towards development adequate lighting protection systems, and the first experiences with these new designs are beginning to be seen . It is therefore reasonable at the this time to consider and prepare for a standardization effort that will give both manufactures and operators a common framework for appropriate lighting protection of wind turbines.

This International standard covers those aspects to be considered when electrical/electronic/programmable electronic systems (E/E/PESs) are used to carry out safety functions. A major objective of this standard is to facilitate the development of application sector international standards by the technical committees responsible for the application sector. This will allow all the relevant factors, associated whit the applications, to be fully taken into account and thereby meet the specific needs of the application sectors. A dual objective of this standard is to enable the development of electrical/electronic/programmable electronic (E/E/PE) safety-related systems where application sector international standard may not exist.

This part of the IEC 61508 is intended to be used only after a through understanding of IEC 61508-1 which provides the overall framework for the achievement of functional safety.

This part of IEC 61508 - Is intended to be utilized only after a thorough understanding of IEC 61508 -1 and IEC 61508-2. - applies to any soft wear forming part of a safety - related system or used to develop a safety - related systems within the scope of IEC 61508 - 1 and IEC 61508-2 . Such software is termed safety-related software.

This part of the IEC 61508 contains the definitions and explanation of items that are used in part 1 to 7 of the standard 1.1 The definitions are grouped under general headings do that related terms can be understood within the content of each other . But it should be noted that these headings are not intended to add meaning to the definitions , and in this sense the headings should be disregarded.

This standard of IEC 61508 provides information -the underlying concepts of risk and the safety integrity levels for the E/E/PE safety -related systems , other technology safety-related systems and external risk reduction facilities to be determination (see annexes B, C, D, and E)

This part of IEC 61508 contains an overview of various safety techniques and techniques and measures relevant to IEC 61508 and IEC 61508 -3

This part of IEC 61508 contains information and guidelines on IEC 61508-2 IEC 61508-3 - Annex A gives a brief overview of the requirements of IEC 61508-2 and IEC 61508-3 and sets out the functional steps in their application.

This International standard gives requirements for the specification , design, installation, operation and maintenance of a safety instrumented system, so that it can be confidently entrusted to place and /or maintain the process in a safe state. This standard has been developed as a process sector implementation of IEC 61508.

This part of IEC 61606 specifies the basic measurement methods of a linear PCM signal for an audio part of personal computers (PCs) and applies to both desktop and portable computers. The common measuring conditions and methods are described in IEC 61606-1 specific conditions and methods of measurement for PCs are given in this standard.