What are the types of explosion-proof electrical equipment?

What are the types of explosion-proof electrical equipment

Explosion-proof electrical equipment types are:

1, explosion-proof safety type (mark A). Electrical equipment that does not produce sparks, arcing, or dangerous temperatures during normal operation to improve safety.

2, flameproof type (mark B). Its structure is completely enclosed. Even if it explodes inside the electrical equipment, it will not transmit the explosion to ignite the external explosive gas, thus eliminating the risk of fire and explosion, and flameproof motors are such structures.

3, explosion-proof oil-filled type (mark C). Electrical equipment that immerses live parts that may produce sparks, arcing, or dangerous temperatures that may become ignition sources into oil so that external combustible gases do not ignite and explode.

4,explosion-proof ventilation and inflation type (mark F), in the interior filled with air or inert gas, and make it maintain positive pressure to prevent external flammable gas into the internal electrical equipment.

5, explosion-proof safety spark type (mark H). In the circuit system, the electrical spark generated under normal circumstances will not ignite the explosive gas of the electrical equipment. The device is divided into I, II and III levels according to the minimum detonating current. This explosion-proof electrical device has very low current limits and is used for instrumentation and communication.

6, explosion-proof special type (mark T). This structure does not belong to the above types, but uses other explosion-proof measures of electrical equipment.

XY900 explosion-proof touch tablet

通智能21.5寸航空铝合金防爆触摸一体计算机

●Efficient and sensitive explosion-proof touch screen, can be directly touched in the explosion-proof area

●Comply with the requirements of explosion-proof national standard, the touch panel has anti-static treatment to avoid electrostatic spark ignition dangerous environment

●No fan design, to avoid the failure caused by the fan, innovative and efficient heat dissipation design, to provide higher heat dissipation efficiency

●Optional low temperature/wide temperature type, to meet the harsh environmental requirements of high temperature and cold

●Industrial design, high reliability, long-term stable operation

Second, what is the selection principle of explosion-proof electrical equipment

1,equipment selection principle

The selection of explosion-proof electrical equipment must be appropriate to the level of risk of explosive mixtures.

The so-called dangerous degree of explosive mixture refers to the explosive mixture of the detonation level, ignition temperature group. The selected explosion-proof electrical equipment must be adapted to the explosion-transmission level, group, and level of the dangerous area of the explosive mixture, otherwise it cannot guarantee safety. In addition, as there are more than two types of explosive substances with different risk levels in an area, it is necessary to choose an explosion-proof structure that is compatible with the most dangerous explosion level and natural temperature level. In non-hazardous areas, ordinary electrical equipment is generally used, but when containers containing explosive substances are placed in non-hazardous areas, there is also the possibility of danger under abnormal circumstances. For example, or because the container rotten oil overflow dangerous substances, or because the operation workers mistakenly put dangerous substances, or because of abnormal reactions to form high temperature and high pressure, so that the device, the container is damaged and leaked explosive substances. Therefore, the possibility of accidental danger must be considered.

2, choose the appropriate explosion-proof type

The selection of explosion-proof structure must be applied to the dangerous area, and what kind of explosion-proof structure must be used in the dangerous area of what nature. The explosion-proof performance is different because of the structure, so it is necessary to choose the appropriate explosion-proof type according to the type of explosive substance, the type of equipment, and the risk degree of the installation site.

3, adapt to environmental conditions

The explosion-proof performance mentioned in this article is based on the standard environment. Explosion-proof equipment is divided into "indoor use" and "outdoor use". The equipment used indoors is used outdoors, and the ambient temperature is not suitable for 40C. Outdoor use of equipment to adapt to the open environment, requiring the adoption of anti-sun, rain and wind sand and other measures. In addition, some equipment is used in corrupt or toxic environments, high temperature, high pressure or low temperature environments, and when selecting explosion-proof equipment, it should be considered to adapt to the special requirements of these special environments.