標準編號:	GB/T 2951.51-2008
中文名稱:	電纜和光纜絕緣和護套材料通用試驗方法 第51部分：填充膏專用試驗方法 滴點 油分離 低溫脆性 總酸值 腐蝕性23℃時的介電常數 23℃和100℃時的直流電阻率
英文名稱:	Common test methods for insulating and sheathing materials of electric and optical cables - Part 51: Methods specific to filling compounds - Drop point - Separation of oil - Lower te
中標分類:	K31    低壓配電電器
行業分類:	GB    國家標準
ICS分類:	29.060 29.060    電線和電纜 29.060
發布機構:	中華人民共和國國家質量監督檢驗檢疫總局 中國家標準化管理委員會
發布日期:	2008-6-26
實施日期:	2009-4-1
標準狀態:	valid
替代舊標準:	GB/T 2951.10-1997 電纜絕緣和護套材料通用試驗方法 第5部分:填充膏專用試驗方法 第1節:滴點--油分離--低溫脆性--總酸值--腐蝕性--23°C時的介電常數--23°C和100°C時的直流電阻率
翻譯語言:	英文
文件格式:	PDF
中文字符數:	12000 字
翻譯價格(元):	720.0
交付時間:	付款后 1 個工作日

1 General 1.1 Scope This part of GB/T 2951 specifies the test methods for filling compounds of electric and optical cables used with telecommunications equipment, including cables used in ships and in offshore applications This part of GB/T 2951 specifies the methods for drop-point, separation of oil, lower temperature brittleness, total acid number, absence of corrosive components, permittivity at 23 °C, d.c. resistivity at 23 °C and 100 °C. 1.2 Normative References The following normative document contains provisions which, through reference in this text, constitute provisions of this part of GB/T 2951. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent edition of the normative document indicated below. For undated references, the latest edition of the normative document referred to applies. GB/T 5654-2007 Insulating Liquids — Measurement of Relative Permittivity Dielectric Dissipation Factor (tanδ) and D.C. Resistivity (IEC 60247:2004, IDT) 2 Test Values Any test requirements which are given in this part may be modified by the relevant cable standard to suit the needs of a particular type of cable. 3 Applicability Conditioning values and testing parameters are either specified in the materials specifications or in the product specifications. 4 Drop-point Note: These tests are intended for classification purposes only.

Foreword II 1 General 1.1 Scope 1.2 Normative References 2 Terms and Definitions 3 Test Values 4 Applicability 5 Type Tests and Other Tests 6 Pre-conditioning 7 Median Value 8 Tensile Strength and Elongation at Break After Conditioning at Elevated Temperature 8.1 General 8.2 Conditioning Procedure 8.3 Tensile Strength and Elongation Tests After Conditioning at Elevated Temperature 8.4 Expression of Results 9 Wrapping Test After Conditioning at Elevated Temperature 9.1 General 9.2 Conditioning Procedure 9.3 Test Procedure 9.4 Evaluation of Results 10 Wrapping Test After Thermal Ageing in Air 10.1 General 10.2 Apparatus 10.3 Sampling 10.4 Ageing Procedure 10.5 Test Procedure 10.6 Evaluation of Results 11 Mass Increase of Insulation 11.1 General 11.2 Sampling 11.3 Test Procedure 11.4 Calculation Annex A (Normative) Long-term Stability Test Annex B (Normative) Test Method for Copper-catalyzed Oxidative Degradation of Polyolefin Insulated Conductors [Oxidation Induction Time (OIT) Test]