TS IEC 60050-131/A2

TS IEC 60050-131/A2 is an amendment to Part 131 of the International Electrotechnical Vocabulary, which is devoted to circuit theory. This update relates to the general terminology used in the theory of electric and magnetic circuits, covering circuit elements and their characteristics, network topology, n-port and two-port networks, and the general terms used for methods of circuit theory.

As a vocabulary standard, this document is concerned with the meaning and coordinated use of terms rather than prescribing calculation procedures. In circuit theory, concepts such as element, network, topology, and two-port describe different technical levels: elements are the building blocks of circuits, topology describes how they are interconnected, and n-port structures provide a way to model multi-terminal behaviour. The stated purpose is to keep this terminology consistent with the other specialised parts of the IEV.

How the terminology fits together

In broader engineering practice, this terminology provides a shared language for both electric and magnetic circuits. N-port and two-port networks are central abstractions for analysing filters, amplifiers, interconnections, and other systems where input-output behaviour matters, while network topology supports analysis based on the arrangement of connections. The scope also notes that the polyphase-circuits material from the first edition of “Electric and magnetic circuits” will be developed in a separate part of IEC 60050, reflecting a further division of the subject into more specialised terminology.

• This is an amendment, so it updates the vocabulary framework associated with the parent part rather than standing as a full standalone theory text.
• It covers general terms for electric and magnetic circuits, circuit elements, and network structures.
• It includes terminology for n-port and two-port networks used in multi-terminal system analysis.
• The terminology is intended to remain consistent with other specialised parts of the IEV.