Zhengzhou Hualong Explosion-proof Electrical Co., Ltd. is a professional manufacturer of explosion-proof distribution boxes, explosion-proof positive-pressure cabinets, and explosion-proof analysis shelters, long-term committed to the R&D, production, and sales of explosion-proof electrical technology.。Companyexplosion-proofComplete Qualifications，ProcurementContact Phone:15637170992.

What is an explosion-proof distribution box?

As the name implies, an explosion-proof distribution box is a distribution box used in explosion-proof areas, mainly solving the safe operation of distribution boxes in explosive gas or dust environments.。

What types of explosion-proof distribution boxes are there?？

Explosion-proof distribution boxes are classified according to explosion-proof standards into flameproof type, increased safety type, intrinsic safety type, positive-pressure type, and encapsulated type.。Here, people may have misunderstandings. An explosion-proof distribution box may contain more than one of the above explosion-proof types. For example, a double-chamber explosion-proof distribution box has a flameproof chamber for installing electrical components and an increased safety chamber for installing terminal blocks. The two chambers and cable entry/exit points are encapsulated and sealed.。

How to select explosion-proof distribution boxes for different usage environments?？

The explosion-proof electrical industry is divided into Class I and Class II according to usage environments. Class I refers to coal mine underground environments, and Class II refers to explosive gas or dust environments other than coal mine underground.。When selecting, Class I requires a coal mine safety certificate, which requires special attention.。

In addition, Class II environments are further subdivided into IIA, IIB, and IIC according to environmental gases. Except for acetylene, hydrogen, and carbon disulfide which require IIC-type explosion-proof distribution boxes, other gases can use IIB level.。

According to the residence time of on-site combustible gases and dust, they are further subdivided into Zone 0, Zone 1, Zone 2 and Zone 20, Zone 21, Zone 22, respectively for explosive gas environments and dust environments. Zone 0 and Zone 20 rarely use explosion-proof distribution boxes. We mainly need to understand Zone 1 (Zone 21) and Zone 2 (Zone 22).。besidesPositive-pressure explosion-proof cabinetinZone 1、Zone 2When in UseExplosion-proof CertificateWithLocationsInvincibleSame，Flameproof TypeExplosion-proof distribution boxAllUpinTwoProductionAreaRegionUse。