防火网
本站  
設為首頁 加入收藏 網站地圖  中文版 繁体 English
 
測試服務: 機車材料防火測試 | 建築產品防火測試 | 船舶防火測試 | 飛機防火測試 | 耐火測試 | 噴射火測試 | 其他測試
   
用戶名:
密碼:
驗證碼:
   
 
主要阻燃防火認證標準
火車船舶汽車建材
 
相關測試方法 更多>>
EN ISO 9239-1:2010地
EN ISO 1182:2010
NF P 92-501
NF P 92-507
法标F级测试
法标I级测试
法国M级测试
EN ISO 1182
EN ISO 9239-1
EN 13501-1
 
首頁   美国   ASTM D6180在电气放电情况下原油来源绝缘油稳定性标准试验方法
 

ASTM D6180在电气放电情况下原油来源绝缘油稳定性标准试验方法

ASTM D6180 Standard Test Method for Stability of Insulating Oils of Petroleum Origin Under Electrical Discharge
ASTM D6180在电气放电情况下原油来源绝缘油稳定性标准试验方法

During this test, insulating oil in an evacuated cell is subjected to a high voltage discharge between two electrodes. The discharge generates free electrons. These electrons collide with the oil molecules causing many of them to become electronically excited. Some of these molecules lose this energy as a quanta of light emitting fluorescent radiation. Some of the other excited molecules decompose into gases, ionized molecules and free radicals. These changes can provide an indication of the stability of oils under the conditions of this test method. The measures of these changes are the increase of the pressure in the test cell and the increase in the dissipation factor of the test specimen.
During the test, the gas content increases in the cell and the concentration of charge carriers increases in the oil.

1. Scope
1.1 This test method covers a laboratory technique that measures the stability of new, used, or reclaimed insulating oils, similar to those described in Specification D 3487 in the presence of a controlled electric discharge. When subjected to this type of discharge, insulating oils absorb energy and produce gases as well as ionized molecules (charge carriers). The quantity of these decay products can be measured and can provide an indication of the stability of oils under the conditions of this test.
1.2 The gases are retained in the discharge cell and their pressure measured. The charge carriers remain in the test specimen. The change in the dissipation factor before and after the discharge is determined.
1.3 The values stated in SI units are to be regarded as the standard. The values stated in parentheses are for information only.
1.4 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. Specific cautionary statements are given in and .

2. Referenced Documents (purchase separately)
ASTM Standards
ASTM D923 Practice for Sampling Electrical Insulating Liquids
ASTM D924 Test Method for Dissipation Factor (or Power Factor) and Relative Permittivity (Dielectric Constant) of Electrical Insulating Liquids
ASTM D3487 Specification for Mineral Insulating Oil Used in Electrical Apparatus
IEEE Standard
4–1995 IEEE Standard Techniques for High-Voltage Testing
Index Terms
dissipation factor; electrical discharge; gas formation; gassing tendency; insulating oil; oxidation stability; stability;

更多防火阻燃测试认证,请咨询中国防火网
电话:400-666-7290
网址:www.firete.com
邮箱:info@firete.com

...


 來源:防火網 發布時間:11/14/2013 點擊次數:1253

 上一條: ASTM D6113用锥形量热计对电缆或光缆中绝缘材料的着火试验反应特性测定的标准试验方法

 下一條: ASTM D6181源自石油的矿物绝缘油中混浊度测量的标准试验方法
 
 
網站首頁 | 測試服務 | 各國標準 | 新聞資訊 | 防火材料 | 會展信息 | 認證服務 | 在線咨詢 | 聯系我們
Copyright © 2009-2023 Firete.com All Right Reserved 蘇公網安備 32010502010088號
服務熱線:+86 25-86583475   備案號:苏ICP备10201999号-1 DIN5510-2 DIN5510 防火網博客