With the rapid development of the petroleum, chemical, and mining industries, lighting in production, storage, and rescue is becoming more widespread and varied. So It’s essential to produce a lamp which can work in these dangerous locations, as it’s related to our lives and safety.
Explosion-proof lamps use in dangerous places where combustible gases and dust exist, which can prevent the arcs, sparks, and high temperatures that may generate inside the light from igniting the combustible gases and dust in the surrounding environment to meet the requirements of explosion-proof.
The explosion-proof lighting is divided into different levels to meet different location’s requirements, and they also depend on a different standard; let’s learn about this basic knowledge about EX-proof lamps below:
1. The explosion-proof type is divided into explosion-proof, safety-enhancing, positive pressure, non-sparking, and dust explosion-proof, a total of five main types, but also by other explosion-proof types and the above explosion-proof combination of various types or composite type and particular type,
2. The protection type against electric shock can be divided into Ⅰ, Ⅱ, Ⅲ types. Protection against electric shock is to prevent explosion-proof lamps, and lanterns shell easy-to-touch parts charged so that human electrocution or different potential conductors connect the electrical spark and ignite the explosive mixture.
A. Class I —- based on essential insulation, easy to reach the regular operation of non-electric conductive parts are connected to the fixed line in the protective grounding conductor.
B. Class Ⅱ – Use double or reinforced insulation without grounding protection as a safety protection measure.
C. Class III – Use a safety voltage with a practical value of not more than 50v, in which no higher voltage value is generated.
D. 0 Class —- relies only on essential insulation as a safety protection measure.
The vast majority of explosion-proof luminaires are protected against electric shock in Class 1 fixtures, with only a few in Class II and III. For example, all-plastic explosion-proof lamps and lanterns, explosion-proof flashlight Jane.
3, according to the shell protection level: there are many different shell protections to protect the role of electrical insulation, as if the dust, solid foreign objects, and water come into the lamp cavity, touch or accumulate on the live parts to produce jump fire, short circuit or damage electrical insulation and other dangers, With the characteristic letter “IP” followed by two numbers to characterize its shell protection level. The first number indicates the ability to protect against people, solid foreign objects, or dust. There are 0-6 levels. Explosion-proof lightings are sealed in body structure, the dust-proof ability of at least the Fourth level, and the second number indicates the ability to protect against water, divided into 0-8 classes. For explosion-proof light, most of their waterproof level is more than 5th.
4, according to the luminaire design fix support surface material classification: Indoor explosion-proof luminaires may be installed in many ordinary combustible material surfaces, such as wood walls and ceilings. They do not allow explosion-proof luminaires to be installed on the surface of the temperature exceeding the safe value. Explosion-proof luminaires can be classified into two categories based on whether they can be installed directly on the surface of common combustible materials. One type is suitable for installation on non-combustible surfaces. The other category is ideal for direct installation on the surface of ordinary flammable materials, lamps, and lanterns, marked with symbols.
5. Can be divided into the boom, sidewall, ceiling, guardrail, flange, streetlamp, bracket, and floodlight bracket according to installation and use. You may search “installation” to see our article for more details about different installation ways.