ASTM D4245在干90℃/湿75℃时电线和电缆的耐臭氧热塑性弹性体绝缘的标准规范

ASTM D4245 Standard Specification for Ozone-Resistant Thermoplastic Elastomer Insulation For Wire and Cable, 90°C Dry/75°C Wet Operation
ASTM D4245 在干90℃/湿75℃时电线和电缆的耐臭氧热塑性弹性体绝缘的标准规范

This specification covers ozone-resistant thermoplastic elastomer insulation for electrical wires and cables operating continuously at specified conductor temperatures, within the specified voltage range, and under wet or dry conditions. The prescribed tests cannot be performed unless the insulation is formed around a conductor, but these are done solely to determine the insulation properties and not to test the conductor or completed cable. Each test sample should be subjected to ac and dc voltage withstand tests as well as insulation resistance tests and should comply with the required values for aging, heat distortion, electrical permittivity, increase in capacitance, stability factor, and accelerated water absorption.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

1. Scope
1.1 This specification covers an ozone-resistant insulating compound for electrical wire and cables 14 AWG and larger. This compound consists substantially of a thermoplastic elastomer.
1.2 This type of insulation is suitable for continuous operation at conductor temperatures not exceeding 90 °C in dry locations and 75 °C in wet locations. Operating voltages are not to exceed 2000 V. The minimum installation temperature is ?40 °C.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.4 In many instances the insulation material cannot be tested unless it has been formed around a conductor or cable. Therefore, tests are done on insulated wire or cable in this document solely to determine the relevant property of the insulation material and not to test the conductor or completed cable.

2. Referenced Documents (purchase separately)
ASTM Standards
ASTM D470 Test Methods for Crosslinked Insulations and Jackets for Wire and Cable
ASTM D1711 Terminology Relating to Electrical Insulation
ASTM D2633 Test Methods for Thermoplastic Insulations and Jackets for Wire and Cable
Index Terms
accelerated water absorption; ac voltage test; dc voltage test; insulation; insulation resistance; 90 °C dry/75 °C wet insulation; ozone-resistant; thermoplastic elastomer; thermoplastic elastomer insulation; Elastomeric materials/applications--specifications; Electrical insulating materials--specifications; Insulated wire and cable--specifications; Ozone (O3)-resistant insulation--specifications; Thermoplastic elastomers (TPE)--specifications; Thermoplastic insulation materials/applications--specifications; Accelerated aging/testing--insulation ;
 
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 来源：防火网　发布时间：12/24/2013 点击次数：1375