Cores for inductors and transformers for telecommunications Methods of measurement

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

31-10-1984

Publisher

British Standards Institution

National foreword
Committees responsible
Section one - General
1 Scope
2 Object
3 Environmental conditions
4 General precautions for methods involving
    permeability measurements
5 General precautions for loss measurement at low
    flux density
6 Magnetic conditioning
7 Inductance measurement
Section two - Common measuring methods
8 Disaccommodation
9 Variation of permeability with temperature
10 Range of inductance adjustment
11 Losses
Section three - Specialized measuring methods
12 Third harmonic distortion
13 Magnetic shock sensitivity
14 Contribution of the adjusting device to the core
    instability
15 Influence of a static magnetic field
16 Magnetic properties under pulse conditions
17 (Effective) Amplitude permeability
Appendices
A Apparatus for magnetic conditioning with capacitor
    discharge
B Power amplifier for magnetic conditioning
C Apparatus for magnetic conditioning based on the
    alternating field method
D Thermal method for magnetic conditioning
E Guide for the design of inductance measuring coils
    for newly developed types of cores
F Methods of expressing temperature dependence
G Damped oscillation method for loss measurement
    calibration
H Transmission method for loss measurement calibration
J Examples of circuits for measuring total core loss
K Example of a circuit for measuring third harmonic
    distortion (low impedance method)
L Methods of inductance measurement in the presence of
    a static magnetic field
M Examples of circuits for pulse measurements
N Examples of circuits for measuring (effective)
    amplitude permeability

Gives guidance on drafting those parts of specifications for magnetic cores concerned with measuring methods for magnetic and electrical properties of cores made primarily of magnetic oxides or metallic powders, and used in inductors and transformers for telecommunication and similar equipment.

This standard applies to magnetic cores, mainly made of magnetic oxides or metallic powders, used in inductors and transformers for telecommunication equipment and electronic devices employing similar techniques.

Some of the methods described in this standard may also be suitable for magnetic cores used in other components.

Committee	EPL/51
DevelopmentNote	Also numbered as IEC 60367-1 Supersedes 79/30812 DC, 79/29950 DC and 80/33077 DC (09/2005)
DocumentType	Standard
Pages	72
PublisherName	British Standards Institution
Status	Current
Supersedes	BS 5938-1:1980

BS 9925-03.0:1988	Harmonized system of quality assessment for electronic components. Inductor and transformer cores for telecommunications Sectional specification: Magnetic oxide cores for transformers and chokes for power applications
BS 9925-02.0:1987	Harmonized system of quality assessment for electronic components. Inductor and transformer cores for telecommunications Sectional specification: magnetic oxide cores for broad-band transformers
BS 9925-0:1984	Harmonized system of quality assessment for electronic components. Inductor and transformer cores for telecommunications Generic specification
BS 9720:1983	Specification for custom-built transformers and inductors of assessed quality: generic data and methods of test
BS EN 60431:1997	Specification for dimensions of square cores (RM-cores) made of magnetic oxides and associated parts
BS 9720:1989	Specification for custom-built transformers and inductors of assessed quality: generic data and methods of test
BS 9925-03.01:1988	Harmonized system of quality assessment for electronic components. Inductor and transformer cores for telecommunications Blank detail specification: magnetic oxide cores for transformers and chokes for power applications. Assessment level A
BS EN 125500:1996	Harmonized system of quality assessment for electronic components. Sectional specification: magnetic oxide ring cores for interference suppression and low level signal transformer applications
BS 9925-01.0:1984	Harmonized system of quality assessment for electronic components. Inductor and transformer cores for telecommunications Sectional specification: magnetic oxide cores for inductor applications
BS EN 125400:1993	Harmonized system of quality assessment for electronic components: sectional specification: adjusters used with magnetic oxide cores for use in inductors and tuned transformers
BS CECC 25300:1981	Harmonized system of quality assessment for electronic components: sectional specification: magnetic oxide cores for power applications
BS 9730:1986	Sectional specification for power transformers of assessed quality for switched mode power supplies (SMPS) for use in electronic equipment for capability approval

BS 2011-2.1A:1977	Environmental testing. Tests Tests A. Cold
BS 2011-2.1B:1977	Environmental testing. Tests Tests B. Dry Heat
BS 6454:1983	Method for calculation of the effective parameters of magnetic piece parts
BS 4738-1:1971	Specification for enamelled copper conductors with an additional heat-bonding coating. Round wire

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BS 5938-1:1984

Cores for inductors and transformers for telecommunications Methods of measurement

Table of Contents

Abstract

Scope

General Product Information

Standards Referenced By This Book

Standards Referencing This Book

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