GJB150.2A-2009 Environmental Test Methods for Military Equipment Laboratories Part 2: Low Pressure (Altitude) Test

Low pressure testing is one of the overlooked aspects in the traditional type inspection of secondary equipment in power systems, and its purpose is to determine the adaptability of the tested equipment to low-pressure environments during storage, transportation, and use. Today, with the comprehensive development of digital substation construction, many intelligent substations are located in high-altitude areas. The "high-altitude reaction" brought by high altitude to various devices has aroused people's attention to low-pressure testing.

For low-pressure testing, there are usually two methods: low-temperature low-pressure and high-temperature low-pressure. At an altitude of 3000m (70kPa), low-temperature environments mainly occur, so low-temperature low-pressure testing is used to investigate the equipment's adaptability to low-pressure environments.