Obecné elektrotechnické normy

Oblast zaměření: Hliníkové elektrické vodiče
Komise : IEC/SC 46F (RF and microwave passive components)
Původce: ISO\IEC\CEN\CENELEC
K připomínkám do: 1.12.2020
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This specification defines general requirements and test methods for waveguide to coaxial adapters. It includes terms and definitions, design and construction, ratings and characteristics, climatic categories, IEC type designation, requirements and test methods, quality assessment, marking, and etc.

It provides the basis for establishing the sectional specifications for various waveguide to coaxial adapters.

This part applies to waveguide to coaxial adapters (short name adapter).

For the purpose of this specification, according to ends, adapters are classified as the following:

Class Ⅰ:Waveguide to coaxial connector adapter, waveguide at one end, and coaxial connector at the other end;

Class Ⅱ:Waveguide to coaxial cable adapter, waveguide at one end,and coaxial cable at the other end;

Class Ⅲ:Waveguide to coaxial cabled connector adapter, waveguide at one end,and coaxial cabled connector at the other end.

According to whether the inner conductor probe of coaxial end is connected with the inner wall of waveguide cavity or not, adapters are classified as the following:

Connected adapter: Inner conductor probe of coaxial end is connected with inner wall of waveguide cavity;

Disconnected adapter: inner conductor probe of coaxial end is disconnected with inner wall of waveguide cavity.

Komise : IEC/TC 112 (Evaluation and qualification of electrical insulating materials and systems)
Původce: ISO\IEC\CEN\CENELEC
K připomínkám do: 22.12.2020
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This standard describes two test methods for the evaluation of electrical insulating materials for use under severe ambient conditions at power frequencies (45 Hz to 65 Hz) by the evaluation of the resistance to tracking and erosion, using a liquid contaminant and inclined plane specimens. The two methods are:

–   Method 1: test at constant voltage,

–   Method 2: test at stepwise increased voltage.

Method 1 is the most widely used method as there is less need for continual inspection.

The test conditions are designed to accelerate the production of the effects, but do not reproduce all the conditions encountered in service.

Komise : IEC/TC 3 (Documentation, graphical symbols and representations of technical information)
Původce: ISO\IEC\CEN\CENELEC
K připomínkám do: 29.12.2020
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This International Standarddocument specifies methods and rules for the designation of phase difference between two items in a three-phase AC system. The designations are intended to be applied in the technical documentation of industrial installations, equipment and products, and also on markings of equipment and products.

Komise : IEC/TC 112 (Evaluation and qualification of electrical insulating materials and systems)
Původce: ISO\IEC\CEN\CENELEC
K připomínkám do: 12.01.2021
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This part of IEC 62631 covers a method of test for the determination of volume resistance and volume resistivity of electrical insulating materials by applying a DC voltage.

Komise : IEC/TC 3 (Documentation, graphical symbols and representations of technical information)
Původce: ISO\IEC\CEN\CENELEC
K připomínkám do: 12.01.2021
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This document applies to the identification and marking of terminals of electrical equipment such as resistors, fuses, relays, contactors, transformers, rotating machines and, wherever applicable, to combinations of such equipment (e.g. assemblies), and also applies to the identification of terminations of certain designated conductors. It also provides general rules for the use of certain colours or alphanumeric notations to identify conductors with the aim of avoiding ambiguity and ensuring safe operation. These conductor colours or alphanumeric notations are intended to be applied in cables or cores, busbars, electrical equipment and installations.

This basic safety publication is primarily intended for use by technical committees in the preparation of standards in accordance with the principles laid down in IEC Guide 104 and ISO/IEC Guide 51.

It is not intended for use by manufacturers or certification bodies. One of the responsibilities of a technical committee is, wherever applicable, to make use of basic safety publications in the preparation of its publications. The requirements of this basic safety publication will not apply unless specifically referred to or included in the relevant publications.

Komise : IEC/SC 77C (High power transient phenomena)
Původce: ISO\IEC\CEN\CENELEC
K připomínkám do: 19.01.2021
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This document defines the high-altitude electromagnetic pulse (HEMP) conducted environment that is one of the consequences of a high-altitude nuclear explosion.

Those dealing with this subject consider two cases:

–   high-altitude nuclear explosions;

–   low-altitude nuclear explosions.

For civil systems the most important case is the high-altitude nuclear explosion. In this case, the other effects of the nuclear explosion: blast, ground shock, thermal and nuclear ionizing radiation are not present at the ground level.

However, the electromagnetic pulse associated with the explosion may cause disruption of, and damage to, communication, electronic and electric power systems thereby upsetting the stability of modern society.

The object of this document is to establish a common reference for the conducted HEMP environment in order to select realistic stresses to apply to victim equipment for evaluating their performance.

Komise : IEC/TC 3 (Documentation, graphical symbols and representations of technical information)
Původce: ISO\IEC\CEN\CENELEC
K připomínkám do: 19.01.2021
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This part of IEC 81346, published jointly by IEC and ISO, establishes general principles for the structuring of systems including structuring of the information about systems.

Based on these principles, rules and guidance are given for the formulation of unambiguous reference designations for objects in any system.

The reference designation identifies objects for the purpose of creation and retrieval of information about an object, and where realized about its corresponding component.

A reference designation labelled at a component is the key to find information about that object among different kinds of documents.

The principles are general and are applicable to all technical areas (for example mechanical engineering, electrical engineering, construction engineering, process engineering). They can be used for systems based on different technologies or for systems combining several technologies.

This document is also a horizontal publication intended for use by technical committees in preparation of publications related to reference designations in accordance with the principles laid down in IEC Guide 108.