Shenhai e fakamoʻoni fakaʻauha
ʻI he puipuituʻa ʻo e pressurized meʻangaue fakaʻuhila, hokohoko atu hono vakaiʻi ʻo e founga maluʻi pressurization ʻoku tuʻu ia ko ha sitepu mahuʻinga ʻi hono tauhi ʻo e ngaahi meʻa maluʻi ʻo e meʻangaue. ʻOku faʻu ʻe he tafaʻaki ko ʻeni ha ʻulungaanga mahuʻinga ʻo pressurized ngaahi meʻangaue fakaʻuhila.
Ko e meʻangaue maluʻi fakahangatonu ʻi he founga maluʻi pressurization, tasked with monitoring and managing the system’s operational status, must not become an ignition source for combustible gases. It should either meet specific explosion-proof standards or be located in areas free from fakafepakiʻi ngaahi fakatuʻutāmakí. Designers must prioritize this factor in their planning.
When integrating explosion-proof automatic safety devices, designers should follow these guidelines:
1. He “pb” class pressurized electrical equipment, the automatic safety device’s explosion-proof classification can utilize various types conforming to Ga “Fineʻeiki” or Gb “Fineʻeiki” protection levels.
2. He “PC” class pressurized electrical equipment, different explosion-proof classifications can be used for automatic safety devices, each corresponding to varying levels of explosion-proof protection.
ʻIkai ngata ai, it’s crucial to recognize that various automatic safety devices are indispensable components of the pressurization protection system. They must consistently provide reliable
“service” ki muʻa ʻi he, lolotonga e, and after the system operates. Ko ia, the power source for these safety devices should not coincide with the main circuit. Ko hono moʻoni, it should be placed before the main circuit’s fetongi ʻo e fakamoʻoni fakaʻauha or power switch to ensure uninterrupted service, even in the event of a main circuit power outage.