1.1 本规程涵盖了变压器绝缘液上方气体的采样。气体取样瓶从正压气体空间收集气体样本。 1.2 采集代表性气体样品进行分析，以确定其成分。 1.3 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 2.1 变压器和其他电力设备中绝缘液上方的气体样本可用于早期指示正在发展的故障条件。可燃气体是绝缘材料在热应力和电应力下击穿形成的。可燃气体浓度过高表明需要采取适当措施。 2.2 重要的是，应从液位正上方的气体空间采集设备的气体样本，而不是从遥远的膨胀室（如储罐支撑带）采集。 2.3 应仔细遵循所述程序，以确保样品不会被空气或氮气稀释，或被取样瓶中的残留物质污染。

1.1 This practice covers the sampling of gas above the insulating liquid of a transformer. A gas sampling bottle collects the gas sample from the gas space that is at a positive pressure. 1.2 Representative samples of gas are taken for analysis to determine their compositions. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 2.1 A gas sample from above the insulating liquid in transformers and other electrical power apparatus can be used to give an early indication of developing fault conditions. Combustible gases are formed from the breakdown of the insulating materials under thermal and electrical stress. Excessive concentrations of combustible gases indicate the need to take appropriate action. 2.2 It is important that gas samples from equipment be taken from the gas space directly above the liquid level, and not from remote expansion compartments, such as tank bracing bands. 2.3 The procedure described should be carefully followed to ensure that the sample is not diluted by air or nitrogen, or contaminated by residual materials in the sampling bottle.