Pahū ʻo Shenhai
Pono e hoʻolālā ʻia ka hoʻolālā ʻana o nā mea kukui pahū-hōʻoia i ka ʻāpana kikoʻī a me kahi o nā wahi kinoea pahū.. ʻo kahi laʻana, ma Zone 1 mau wahi, pale ahi (pahū-pale) pono nā lako kukui; ma Zone 2, hiki ke hoʻohana ʻia nā mea pale ahi a hoʻonui i ka palekana no ke kukui paʻa, while portable lighting must be flameproof. The selected explosion-proof lighting’s level or group should not be lower than the level and group of the explosive mixtures present in the hazardous environment. Eia hou, the impact of the environment on explosion-proof lighting should be considered, including requirements for ambient mahana wela, air humidity, and resistance to corrosive or contaminant substances. The choice of protection and corrosion resistance ratings for lighting fixtures is critical, especially in pahū gas environments with corrosive gases.
Historically, in petrochemical industries, pale ahi lighting fixtures were predominantly used in hazardous areas. Eia naʻe, with the widespread application of increased-safety electrical equipment in Zone 2 nā wahi pōʻino, increased-safety and composite lighting fixtures are increasingly being used. Compared to flameproof fixtures, increased-safety fixtures offer advantages like lighter weight, lower cost, easier installation and maintenance, and longer service life. The commonly used composite electrical equipment in petrochemical industries combines flameproof and increased-safety features, typically consisting of flameproof components, increased-safety terminals, and an increased-safety enclosure. This composite design offers the safety of flameproof fixtures along with the benefits of increased-safety models.
In LED explosion-proof lighting, both flameproof and increased-safety properties are utilized. For portable fixtures, flameproof components are used. Regardless of the type of explosion-proof component, the level of explosion protection must not be lower than the level and group of the explosive mixtures in the hazardous environment. ʻae nō hoʻi, when using LED explosion-proof lighting, nā mea e like me ke kaiapuni hoʻonohonoho, ka wela ambient, air humidity, and control of corrosive and contaminant substances should also be considered.