绝缘液体.工频击穿电压的测定.试验方法

[中文适用范围]： 该文件规定了在工频下测定绝缘液体介电击穿电压的方法。试验程序在规定的装置中进行，油样经受逐渐增加的交流电场，直到发生击穿。该方法适用于粘度标称值高达40°C时350 mm²/s的所有类型绝缘液体。该方法适用于新油交付时的验收测试，也适用于确定在设备监测和维护中取样时样品的状态。 [外文原描述]： IEC 60156:2018 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 60156:2018 specifies the method for determining the dielectric breakdown voltage of insulating liquids at power frequency. The test procedure is performed in a specified apparatus, where the oil sample is subjected to an increasing AC electrical field until breakdown occurs. The method applies to all types of insulating liquids of nominal viscosity up to 350 mm2/s at 40 °C. It is appropriate both for acceptance testing on unused liquids at the time of their delivery and for establishing the condition of samples taken in monitoring and maintenance of equipment. This third edition cancels and replaces the second edition published in 1995. This edition constitutes a technical revision and, mainly, confirms the content of the previous edition even if some advances are included. The test method has not been changed for practical reason due to the very large number of instrumentation disseminated around the world, even if the use of stirring is now recommended.