Shenhai Ho phatloha-Bopaki
Lisebelisoa tsa mabone tse thibelang ho phatloha ke sehlopha sa mabone a entsoeng ka likarolo tse sireletsang ho phatloha, tšoauoa ka “Ex” seka. Lisebelisoa tsena li na le thepa e khethehileng ea ho tiisa le mehato e meng ea tšireletso mohahong oa tsona, joalo ka ha ho laetsoe ke maemo a naha. Ho fapana le mabone a sa phatloheng, ba khomarela litlhoko tse 'maloa tse ikhethang:
1. Sehlopha se thibelang ho phatloha, Kereiti, and Temperature Group: These are defined by national standards.
2. Types of Explosion-proof Protection:
There are five main types – e thibelang mollo, tshireletso e eketsehileng, khatello e ntle, e sa hlabeng, and dust explosion-proof. They can also be a combination of these types or be of a composite or special kind.
3. Tšireletso ea Tšireletso ea Motlakase:
Classified into three categories – I, II, le III. The purpose is to prevent electric shocks from accessible parts or conductors at different potentials, which might ignite qhoma metsoako.
Mofuta oa I: Based on basic insulation, conductive parts that are normally non-live and accessible are connected to a protective earth conductor in the fixed wiring.
Mofuta oa II: Uses double or reinforced insulation as safety measures, without grounding.
Mofuta oa III: Operates on a safe voltage not exceeding 50V and doesn’t produce higher voltages.
Mofuta 0: Relies solely on basic insulation for protection.
Most explosion-proof lighting fixtures fall under Type I, with a few being Type II or III, such as all-plastic explosion-proof lights or explosion-proof flashlights.
4. Sebaka sa Ts'ireletso ea Letlapa:
Various protection methods for the enclosure are used to prevent the ingress of dust, solid objects, le metsi, which could lead to sparking, short-circuiting, or compromising the electrical insulation. Characterized by “IP” followed by two digits, the first digit represents protection against contact, tse tiileng, or dust (ho tloha ho 0-6), 'me ea bobeli khahlanong le metsi (ho tloha ho 0-8). As sealed fixtures, explosion-proof lights have at least a level 4 dust protection.
5. Material of Mounting Surface:
Indoor explosion-proof lights might be mounted on ordinary combustible surfaces like wooden walls and ceilings. These surfaces must not exceed a safe mocheso due to the light fixtures.
Based on whether they can be mounted directly on ordinary combustible materials, they are categorized into two types.
Summary – “How are explosion-proof lights different from regular lights?”: Regular lights are used in non-hazardous locations without e ka chang likhase kapa lerole. Unlike explosion-proof lights, they lack explosion-proof grades and types. Regular lights mainly serve illumination purposes, while explosion-proof lights not only provide illumination but also offer explosion protection, ensuring the safety of personnel and preventing property damage.