Need help? Chat now
Cart (0)
Search book title
Enter keywords for book title search
Search book content
Enter keywords for book content search
Filters:
FORMAT
BOOKS
PACKAGES
EDITION
to
PUBLISHER
(356)
(37)
(706)
(458)
(1211)
(68248)
(379)
(76)
(14)
(36)
(243)
(184)
(2831)
(119)
(1292)
(46)
(11)
(25)
(4)
 
(6)
(7)
(76)
(2)
(39)
(2)
(2)
(25)
(18)
(35)
(8)
(44)
(26)
(13)
(4)
(7)
(1)
(3)
(29)
(4)
(16)
CONTENT TYPE
 Act
 Admin Code
 Announcements
 Bill
 Book
 CADD File
 CAN
 Charter
 Checklist
 City Code
 Code
 Commentary
 Comprehensive Plan
 Conference Paper
 County Code
 Course
 Course & CEU
 DHS Documents
 Document
 Errata
 Executive Regulation
 Federal Guideline
 Firm Content
 Guideline
 Handbook
 Interpretation
 Journal
 Land Use and Development
 Law
 Legislative Rule
 Local Amendment
 Local Code
 Local Document
 Local Regulation
 Local Standards
 Manual
 Model Code
 Model Standard
 Notice
 Ordinance
 Other
 Paperback
 PASS
 PIN
 Plan
 Policy
 Product
 Program
 Provisions
 Requirements
 Revisions
 Rules & Regulations
 Standards
 State Amendment
 State Code
 State Manual
 State Plan
 State Standards
 Statute
 Study Guide
 Supplement
 Technical Bulletin
 All
  • ASTM
    A348/A348M-05(2011) Standard Test Method for Alternating Current Magnetic Properties of Materials Using the Wattmeter-Ammeter-Voltmeter Method, 100 to 10 000 Hz and 25-cm Epstein Frame
    Edition: 2011
    $65.00
    Unlimited Users - 1 Loc per year

Description of ASTM-A348 2011

ASTM A348 / A348M - 05(2011)

Standard Test Method for Alternating Current Magnetic Properties of Materials Using the Wattmeter-Ammeter-Voltmeter Method, 100 to 10 000 Hz and 25-cm Epstein Frame

Active Standard ASTM A348 / A348M | Developed by Subcommittee: A06.01

Book of Standards Volume: 03.04




ASTM A348 / A348M

Significance and Use

This test method evaluates the performance of flat-rolled magnetic materials over a wide frequency range of ac excitation with and without incremental dc bias, as used on transformers, motors, and other laminated core devices.

This test method is suitable for design, specification acceptance, service evaluation, and research.

The application of test results obtained with this test method to the design or evaluation of a particular magnetic device must recognize the influence of the magnetic circuitry upon its performance. Some specific items to consider are size, shape, holes, welding, staking, bolting, bracketing, shorting between laminations, ac waveform, adjacent magnetic fields, and stress.

1. Scope

1.1 This test method covers the determination of the magnetic properties of flat-rolled magnetic materials using Epstein test specimens with double-lap joints in the 25-cm Epstein frame. It covers determination of core loss, rms and peak exciting current, exciting power, magnetic field strength, and permeability. This test method is commonly used to test grain-oriented and nonoriented electrical steels but may also be used to test nickel-iron, cobalt-iron, and other flat-rolled magnetic materials.

1.2 This test method shall be used in conjunction with Practice A 34/A 34M and Test Method A 343/A 343M.

1.3 Tests under this test method may be conducted with either normal ac magnetization or with ac magnetization and superimposed dc bias (incremental magnetization).

1.4 In general, this test method has the following limitations:

1.4.1 FrequencyThe range of this test method normally covers frequencies from 100 to 10 000 Hz. With proper equipment, the test method may be extended above 10 000 Hz. When tests are limited to the use of power sources having frequencies below 100 Hz, they shall use the procedures of Test Method A 343/A 343M.

1.4.2 Magnetic Flux Density(may also be referred to as Flux Density )-The range of magnetic flux density for this test method is governed by the test specimen properties and by the available instruments and other equipment components. Normally, for many materials, the magnetic flux density range is from 1 to 15 kG [0.1 to 1.5 T].

1.4.3 Core Loss and Exciting PowerThese measurements are normally limited to test conditions that do not cause a test specimen temperature rise in excess of 50C or exceed 100 W/lb [220 W/kg].

1.4.4 ExcitationEither rms or peak values of exciting current may be measured at any test point that does not exceed the equipment limitations provided that the impedance of the ammeter shunt is low and its insertion into the test circuit does not cause appreciably increased voltage waveform distortion at the test magnetic flux density.

1.4.5 Incremental PropertiesMeasurement of incremental properties shall be limited to combinations of ac and dc excitations that do not cause secondary voltage waveform distortion, as determined by the form factor method, to exceed a shift of 10 % away from sine wave conditions.

1.5 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 except for the sections concerning calculations where there are separate sections for the respective unit systems. 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.

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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

A34/A34M Practice for Sampling and Procurement Testing of Magnetic Materials

A340 Terminology of Symbols and Definitions Relating to Magnetic Testing

A343/A343M Test Method for Alternating-Current Magnetic Properties of Materials at Power Frequencies Using Wattmeter-Ammeter-Voltmeter Method and 25-cm Epstein Test Frame


Keywords

alternating-current; ammeter; core loss; customary units; Epstein; exciting power; flux voltage; form factor; incremental magnetization; induction; magnetic; magnetic material; magnetic test; permeability; voltmeter; wattmeter;


ICS Code

ICS Number Code 29.030 (Magnetic materials)


DOI: 10.1520/A0348_A0348M-05R11

ASTM International is a member of CrossRef.

ASTM A348 / A348M

This book also exists in the following packages...

Year Publisher Title Annual Price
VAR
ASTM
[+] $4,082.00 Buy
VAR
ASTM
[+] $586.00 Buy
VAR
ASTM
[+] $3,070.00 Buy
VAR
ASTM
[+] $322.00 Buy

Subscription Information

MADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.

 

Some features of MADCAD.com ASTM Standards Subscriptions are:

- Online access: With MADCAD.com’ s web based subscription service no downloads or installations are required. Access ASTM Standards from any browser on your computer, tablet or smart phone.

- Immediate Access: As soon as the transaction is completed, your ASTM Standards Subscription will be ready for access.

 

For any further information on MADCAD.com ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.

 

About ASTM

ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.