ASTM A697/A697M-13
(Test Method)Standard Test Method for Alternating Current Magnetic Properties of Laminated Core Specimen Using Voltmeter-Ammeter-Wattmeter Methods
Standard Test Method for Alternating Current Magnetic Properties of Laminated Core Specimen Using Voltmeter-Ammeter-Wattmeter Methods
SIGNIFICANCE AND USE
5.1 This test method was developed for evaluating the ac magnetic properties of laminated cores made from flat-rolled magnetic materials.
5.2 The reproducibility and repeatability of this test method are such that this test method is suitable for design, specification acceptance, service evaluation, and research and development.
SCOPE
1.1 This test method covers the determination of several ac magnetic properties of laminated cores made from flat-rolled magnetic materials.
1.2 This test method covers test equipment and procedures for the determination of impedance permeability and exciting power from voltage and current measurements, and core loss from wattmeter measurements. These tests are made under conditions of sinusoidal flux.
1.3 This test method covers tests for two general categories (1 and 2) of cores based on size and application.
1.4 Tests are provided for power and control size cores (Category 1) operating at inductions of 10 to 15 kG [1.0 to 1.5 T] and at frequencies of 50, 60, and 400 Hz.
1.5 Procedures and tests are provided for coupling and matching type transformer cores (Category 2) over the range of inductions from 100 G [0.01 T] or lower to 10 kG [1.0 T] and above at 50 to 60 Hz or above when covered by suitable procurement specifications.
1.6 This test method also covers tests for core loss and ac impedance permeability under incremental test conditions (ac magnetization superimposed on dc magnetization) for the above core types and at inductions up to those that cause the ac exciting current to become excessively distorted or reach values that exceed the limits of the individual test equipment components.
1.7 This test method shall be used in conjunction with Practice A34/A34M and Terminology A340. It depends upon these designated documents for detailed information which will not be repeated in this test method.
1.8 The values and equations stated in customary (cgs-emu and inch-pound) or SI units are to be regarded separately as standard. Within this standard, SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with this standard.
1.9 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: A697/A697M − 13
Standard Test Method for
Alternating Current Magnetic Properties of Laminated Core
1
Specimen Using Voltmeter-Ammeter-Wattmeter Methods
This standard is issued under the fixed designationA697/A697M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope The values stated in each system may not be exact equivalents;
therefore,eachsystemshallbeusedindependentlyoftheother.
1.1 This test method covers the determination of several ac
Combining values from the two systems may result in noncon-
magnetic properties of laminated cores made from flat-rolled
formance with this standard.
magnetic materials.
1.9 This standard does not purport to address all of the
1.2 This test method covers test equipment and procedures
safety concerns, if any, associated with its use. It is the
for the determination of impedance permeability and exciting
responsibility of the user of this standard to establish appro-
power from voltage and current measurements, and core loss
priate safety and health practices and determine the applica-
from wattmeter measurements. These tests are made under
bility of regulatory limitations prior to use.
conditions of sinusoidal flux.
1.3 This test method covers tests for two general categories 2. Referenced Documents
2
(1 and 2) of cores based on size and application.
2.1 ASTM Standards:
1.4 Tests are provided for power and control size cores A34/A34M Practice for Sampling and Procurement Testing
(Category 1) operating at inductions of 10 to 15 kG [1.0 to 1.5 of Magnetic Materials
T] and at frequencies of 50, 60, and 400 Hz. A340 Terminology of Symbols and Definitions Relating to
Magnetic Testing
1.5 Procedures and tests are provided for coupling and
matchingtypetransformercores(Category2)overtherangeof
3. Terminology
inductions from 100 G [0.01 T] or lower to 10 kG [1.0 T] and
3.1 The terms and symbols listed below apply only to this
above at 50 to 60 Hz or above when covered by suitable
test method.The official list of symbols and definitions may be
procurement specifications.
found in Terminology A340.
1.6 This test method also covers tests for core loss and ac
3.2 Symbols:
impedance permeability under incremental test conditions (ac
A = E lamination surface area, one side only,
magnetization superimposed on dc magnetization) for the
s
A = EI lamination surface area, one side only,
ss
above core types and at inductions up to those that cause the ac
h = lamination stack height,
exciting current to become excessively distorted or reach
A = dc ammeter,
dc
values that exceed the limits of the individual test equipment I = dc current,
dc
N = primary turns,
1
components.
N = secondary turns,
2
N = tertiary turns,
1.7 This test method shall be used in conjunction with 3
R = ammeter shunt resistance,
1
Practice A34/A34M and Terminology A340. It depends upon
V = flux voltmeter,
f
these designated documents for detailed information which
w = lamination center leg width,
W = wattmeter, and
will not be repeated in this test method.
Z = choke coil impedance.
1.8 The values and equations stated in customary (cgs-emu
4. Summary of Test Method
and inch-pound) or SI units are to be regarded separately as
standard. Within this standard, SI units are shown in brackets.
4.1 For Category 1 cores, the recommended tests are made
at a frequency of 60 Hz and at a test induction within the range
from 10 through 15 kG [1.0 to 1.5 T].
1
This test method is under the jurisdiction of ASTM Committee A06 on
MagneticPropertiesandisthedirectresponsibilityofSubcommitteeA06.01onTest
2
Methods. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Nov. 1, 2013. Published November 2013. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1974. Last previous edition approved in 2008 as A697/A697M – 03 Standards volume information, refer to the standard’s Document Summary page on
(2008). DOI: 10.1520/A0697_A0697M-13. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
A697/A697M − 13
4.2 For Category 2 cores, the recommended tests are made cores,havebeendesignedtohaveequalprimaryandsecondary
at a frequency of 50 or 60 Hz and at inductions of 40, 100 or turns and provide an induced voltage of 115 V when operating
200, 2000, 5000, 6000, 7000, and 10 000 G [0.004, 0.01 or at a peak flux density of 15 kG [1.5 T] at 60 Hz.
0.02, 0.2, 0.5, 0.6, 0.7, and 1.0 T]. Any or all may be requi
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A697/A697M − 03 (Reapproved 2008) A697/A697M − 13
Standard Test Method for
Alternating Current Magnetic Properties of Laminated Core
1
Specimen Using Voltmeter-Ammeter-Wattmeter Methods
This standard is issued under the fixed designation A697/A697M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method covers the determination of several ac magnetic properties of laminated cores made from flat-rolled
magnetic materials.
1.2 This test method covers test equipment and procedures for the determination of impedance permeability and exciting power
from voltage and current measurements, and core loss from wattmeter measurements. These tests are made under conditions of
sinusoidal flux.
1.3 This test method covers tests for two general categories (1 and 2) of cores based on size and application.
1.4 Tests are provided for power and control size cores (Category 1) operating at inductions of 10 to 15 kG [1.0 to 1.5 T] and
at frequencies of 50, 60, and 400 Hz.
1.5 Procedures and tests are provided for coupling and matching type transformer cores (Category 2) over the range of
inductions from 100 G [0.01 T] or lower to 10 kG [1.0 T] and above at 50 to 60 Hz or above when covered by suitable procurement
specifications.
1.6 This test method also covers tests for core loss and ac impedance permeability under incremental test conditions (ac
magnetization superimposed on dc magnetization) for the above core types and at inductions up to those that cause the ac exciting
current to become excessively distorted or reach values that exceed the limits of the individual test equipment components.
1.7 This test method shall be used in conjunction with Practice A34/A34M and Terminology A340. It depends upon these
designated documents and a related reference test manual for detailed information which will not be repeated in this test method.
1.8 The values and equations stated in customary (cgs-emu and inch-pound) or SI units are to be regarded separately as
standard. Within this standard, SI units are shown in brackets. The values stated in each system may not be exact equivalents;
therefore, each system shall be used independently of the other. Combining values from the two systems may result in
nonconformance with this standard.
1.9 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
A34/A34M Practice for Sampling and Procurement Testing of Magnetic Materials
A340 Terminology of Symbols and Definitions Relating to Magnetic Testing
3. Terminology
3.1 The terms and symbols listed below apply only to this test method. The official list of symbols and definitions may be found
in Terminology A340.
3.2 Symbols:
1
This test method is under the jurisdiction of ASTM Committee A06 on Magnetic Properties and is the direct responsibility of Subcommittee A06.01 on Test Methods.
Current edition approved Nov. 1, 2008Nov. 1, 2013. Published December 2008November 2013. Originally approved in 1974. Last previous edition approved in 20032008
as A697/A697M – 03.A697/A697M – 03 (2008). DOI: 10.1520/A0697_A0697M-03R08. 10.1520/A0697_A0697M-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
A697/A697M − 13
A = E lamination surface area, one side only,
s
A = EI lamination surface area, one side only,
ss
h = lamination stack height,
A = dc ammeter,
dc
I = dc current,
dc
N = primary turns,
1
N = secondary turns,
2
N = tertiary turns,
3
R = ammeter shunt resistance,
1
V = flux voltmeter,
f
w = lamination center leg width,
W = wattmeter, and
Z = choke coil impedance.
4. Summary of Test Method
4.1 For Category 1 cores, the recommended tests are made at a frequency of 60 Hz and at a test induction within th
...
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