Classification

Explosion-proof lamps are generally classified according to the selected light source, explosion-proof structure type and use method. According to the light source classification, there are explosion-proof incandescent lamps, explosion-proof high-pressure mercury lamps, explosion-proof low-voltage fluorescent lamps, mixed light source lamps, etc.; according to the type of explosion-proof structure, there are explosion-proof lamps, increased safety lamps, composite lamps, etc.; Explosion-proof lamps and portable explosion-proof lamps.

Type

According to the explosion-proof type, it is divided into five main types: flameproof type, increased safety type, positive pressure type, non-sparking type and dust explosion-proof type. It can also be combined with other explosion-proof types and the above-mentioned various types of explosion-proof type or compound type and special type .

Flameproof type d

All the parts of the equipment that may ignite the explosive gas mixture are enclosed in a shell, and the shell can withstand the flammable mixture that penetrates through any joint surface or structural gap of the shell, and the flammable mixture penetrates into the shell without being damaged. As the flame gas propagates through the gap, the energy is reduced enough to detonate the gas of the enclosure.

Increased safety e

Electrical equipment that does not produce arcs and sparks under normal operating conditions takes some additional measures to improve its safety and prevent the possibility of dangerous temperatures, arcs and sparks from its internal and external parts. Explosion-proof type, further adopted in structure Protective measures to improve the reliability and safety of the equipment.

positive pressure p

Protect the electrical equipment from a static positive pressure inside the system by maintaining the pressure of the shielding gas inside the equipment enclosure above the pressure of the surrounding explosion-proof environment to a safe level or by maintaining a continuous flow of air or inert gas to limit the ingress of flammable mixtures into the interior of the enclosure. Take away the flammable gas that enters the casing when the equipment is not under positive pressure to prevent the formation of flammable mixtures in the casing.

This placement I

All circuits inside the equipment are intrinsically safe circuits in the specified explosion-proof gas atmosphere under standard specified conditions (including normal operation and specified fault conditions).

Encapsulation type m

The electrical components that may generate sparks, arcs or dangerous temperature parts that may ignite explosive mixtures are encapsulated in a potting agent (composite) so that it cannot ignite surrounding explosive mixtures. The use of potting measures can prevent electrical components Short circuit, cure electrical insulation, avoid sparks on the circuit and ignition such as arcing and dangerous temperatures, prevent the intrusion of explosive mixtures, and control surface temperatures under normal and fault conditions.