ASTM-D4881 Standard Test Method for Thermal Endurance of Varnished Fibrous- or Film-Wrapped Magnet Wire

ASTM-D4881 - 2005 R17 EDITION - CURRENT
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Standard Test Method for Thermal Endurance of Varnished Fibrous- or Film-Wrapped Magnet Wire
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Scope

1.1 This test method covers the determination of thermal endurance of rectangular and square fibrous- or film-wrapped magnet wire coated with an insulating varnish.

1.2 The values given in SI units are the standard. The values given in parentheses are for information only.

1.3 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. A specific precautionary statement is given in Section 5.

Note 1: There is no similar or equivalent IEC Standard.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Significance and Use

4.1 Individual varnishes behave differently when applied to the same fibrous- or film-wrapped magnet wire when exposed to elevated temperatures. Likewise, a varnish does not always behave the same when applied to different types of fibrous or film-wrapped magnet wires and when exposed to elevated temperatures.

FIG. 1 Jig for Forming Wire

 Jig for Forming Wire Jig for Forming Wire

Keywords

electrical insulating; fibrous-wrapped wire; film-wrapped wire; thermal endurance; varnish;; ICS Number Code 29.060.10 (Wires)

To find similar documents by ASTM Volume:

10.02 (Electrical Insulation (II): D2518 - latest)

To find similar documents by classification:

29.060.10 (Wires Including electric rods, busbars, etc.)

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Document Number

ASTM-D4881-05(2017)

Revision Level

2005 R17 EDITION

Status

Current

Modification Type

Reapproval

Publication Date

Sept. 1, 2017

Document Type

Test Method

Page Count

2 pages

Committee Number

D09.01