BS 5938-1:1984
Current
The latest, up-to-date edition.
Cores for inductors and transformers for telecommunications Methods of measurement
Hardcopy , PDF
English
31-10-1984
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.
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 |
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.
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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