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Product Code:SAE ARP6157
Title:Pressure-Viscosity Coefficient Measurement
Issuing Committee:E-34 Propulsion Lubricants Committee
Scope: The rate at which viscosity increases with pressure is an inherent and fundamental property of lubricating oils. Viscosity increase with pressure contributes substantially to the generation of elastohydrodynamic (EHD) pressure that separate surfaces with an EHD film operating under high stress and relative motion. Viscosity rises exponentially with pressure and the rate of viscosity increase is generally given as an exponent, alpha, assigned to a pressure, p. The measurement of pressure-viscosity coefficient is accomplished by accurately measuring the thickness of a dynamic EHD film between lubricated surfaces under controlled speed, temperature and pressure conditions. The test method uses a WAM test machine available at bearing companies, acedemic institutions, small business and in some government laboratories. Film thickness is measured with optical interferometry using an optical system (AChILES) that provides high resolution 3D mapping of the oil film. Similar test machines with optical interference capability for measurement of dynamic EHD films can also be used. The test method identifies the recommended operating conditions for pressure-viscosity coefficient measurements.
Rationale: The rate at which viscosity increases with pressure is an inherent and fundamental property of lubricating oils. Viscosity increase with pressure contributes substantially to the generation of elastohydrodynamic (EHD) pressure that separate surfaces with an EHD film operating under high stress and relative motion. Viscosity rises exponentially with pressure and the rate of viscosity increase is generally given as an exponent, alpha, assigned to a pressure, p. The measurement of pressure-viscosity coefficient is accomplished by accurately measuring the thickness of a dynamic EHD film between lubricated surfaces under controlled speed, temperature and pressure conditions. The test method uses a WAM test machine available at bearing companies, acedemic institutions, small business and in some government laboratories. Film thickness is measured with optical interferometry using an optical system (AChILES) that provides high resolution 3D mapping of the oil film. Similar test machines with optical interference capability for measurement of dynamic EHD films can also be used. The test method identifies the recommended operating conditions for pressure-viscosity coefficient measurements.

标准名称：	高压并联电容器用放电线圈订货技术条件
英文名称：	Specification of discharge coils for high voltage shunt capacitor for order
中标分类：	电工 >> 输变电设备 >> 电力电容器
替代情况：	被DL/T 653-2009代替
发布部门：	中华人民共和国电力工业部
发布日期：	1998-03-19
实施日期：	1998-10-01
首发日期：	1900-01-01
作废日期：	2009-12-01
提出单位：	电力工业部电力电容器标准化技术委员会
归口单位：	电力工业部电力电容器标准化技术委员会
起草单位：	安徽省电力试验研究所和电力工业部武汉高压研究所
起草人：	江钧祥、盛国钊、史班、李学芳、陈自年、林浩、周国良
出版社：	中国电力出版社
出版日期：	1998-10-01
页数：	14页

本标准规定了高压并联电容器用放电线圈的定义、分类、命名、要求、试验方法、检验规则、标志、包装、运输和储存。
本标准适用于工频6-66 kV电力系统中高压并联电容器组所配用的单相放电线圈。放电线圈与高压并联电容器组并联连接，使电容器从电力系统切除后的剩余电荷能快速泄放，电容器的剩余电压在规定时间内达到要求值。当放电线圈有二次绕组时，可以兼作电气保护装置用。但不包括三相放电线圈的特殊要求。

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