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Systems of Insulating Materials - General
UL 1446
1 Scope
1.1 These requirements cover test procedures to be used in the evaluation of Class 120(E) or higher electrical insulation systems intended for connection to the low voltage side of the distribution network where the voltage is limited to 1000 V or less and where the thermal factor and not transient overvoltages or partial discharge is the dominating aging factor. These requirements also cover the investigation of the substitution of minor components of insulation in a previously evaluated insulation system and also the test procedures to be used in the evaluation of magnet wire coatings, magnet wires, and varnishes.
1.1 revised January 30, 2008
1.2 These requirements do not cover a single insulating material or a simple combination of materials, such as a laminate or a varnished cloth, printed circuit boards, or planar transformers.
1.3 These requirements do not cover insulation systems exposed to radiation or operating in oils, refrigerants, soaps, or other media that potentially degrade insulating materials.
1.4 These requirements shall be modified or supplemented as determined by the applicable requirements in the end-product standard covering the device, appliance, or equipment in which the insulation system is used.
Table of Contents for UL 1446
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Cover
Transmittal
Table of Contents
Body
INTRODUCTION
1 Scope
2 Reference Publications
3 Units of Measurement
4 Glossary
PERFORMANCE CRITERIA
5 Magnet Wire
5.1 Magnet wire coatings
5.2 Magnet wire evaluation
6 Varnishes
7 Insulation Systems
7.1 General
7.2 System components
8 Substitutions or Modification to an Insulation System
8.1 General
8.2 Minor components
8.3 Magnet wire
8.4 Varnish
8.5 Encapsulants, ground, and interwinding insulation
PERFORMANCE TESTS
9 Magnet Wire Coatings/Magnet Wires
10 Varnishes - Thermal Aging
11 Insulation Systems -
11.1 General
11.2 Samples
11.3 Exposures
11.4 Diagnostic tests - determination of end of test-life
11.5 Analysis and evaluation
12 Insulation Systems -
12.1 General
12.2 Samples, exposures, and tests
12.3 Analysis and evaluation
13 Insulation Systems -
13.1 General
13.2 Samples, exposures, and tests
13.3 Analysis and evaluation
14 Sealed Tube Testing
14.1 General
14.2 Samples
14.3 Conditioning
14.4 Interpretation of results of non-bondable wire
14.5 Interpretation of results for bondable wire
15 Infrared Analysis Tests
MARKING
16 Details
Appendix A - Information for Magnet Wire Substitution
Superseded List |
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