Shenzhen Zhongnuo Testing Technology Co., Ltd. is based in South China, offering on-site explosion-proof construction, safety inspections, renovations, project acceptance, and explosion-proof installation consulting services. We are well-versed in explosion-proof construction standards, with experienced teams and a wealth of construction expertise. We have served major enterprises such as PetroChina, LG, Huanlan Environment, BOE, and Sinovac Biotech, receiving consistent praise and trust from our clients!
Protection of explosive loop circuits shall comply with the following regulations (shared by Shenzhen ZhongNuo Testing Technology Co., Ltd.)
In the single-phase network within Area 1, both phase lines and neutral lines should be equipped with short-circuit protection, and appropriate switches should be used to simultaneously disconnect both phase lines and neutral lines.
(2) For 3kV-10kV cable lines, it is advisable to install zero-sequence current protection, and the protective devices in Zones 1 and 21 should be set to trip.

In recent years, with the continuous development of society and the frequent occurrence of safety accidents, people's awareness of safety production has been increasing, and the governance of potential hazards in dangerous environments is urgent.
In numerous industrial sectors in our country, such as oil, chemicals, ports, coal, and others, there is often a risk of leaks or spills of flammable and explosive gases, liquids, dust, and fibers during production, processing, transportation, and storage. When these substances mix with air, they may form explosive mixtures. If the concentration of the mixture reaches the explosive range, any ignition source can trigger explosions and severe fires, potentially leading to catastrophic chain reactions. Therefore, equipment used in such hazardous environments must be certified with explosion-proof capabilities. The use of all explosion-proof environment equipment requires installation and commissioning by experienced engineering companies, strictly adhering to the specifications and acceptance standards for explosion-proof construction. Only then can the safety requirements of each stage of the production process be maximally ensured.

Standard for Explosion-proof Construction Acceptance - Shenzhen Zhongnuo Testing Technology Co., Ltd.
G50058 Specification for Design of Electrical Installations in Explosive Hazardous Environments
GBJ54-83 Specification for Design of Low-Voltage Distribution Equipment and Lines
G50016 Building Design Fire Prevention Code
AQ3009 Electrical Explosion-Proof Safety Regulations for Hazardous Areas
GB/T 3836.1 "Explosive Atmospheres – Part 1: Equipment – General Requirements"
GB/T3836.15 "Design, Selection, and Installation of Electrical Equipment for Explosive Environments"
GB50257 "Code for Construction and Acceptance of Electrical Installations in Explosive and Fire Hazardous Environments"
14J938 "Explosion-Proof and Explosion Ventilation Windows, Roofs, and Wall Construction"

As the world's energy and chemical industries develop, construction in explosive hazardous environments is becoming more widespread, and the prevention and acceptance of explosive environments are increasingly important.
Especially in flammable dust environments, such as plastic factories, feed/food/grain processing plants, metal polishing workshops, and papermaking/forestry wood flour/fiber dust factories, the demand for explosion-proof installation, design, and renovation projects is also increasing.
Whether it's large-scale or local explosion-proofing, if there are potential hazards in product quality or the quality of installation and modification,
Our personal and property safety is greatly threatened, so we must maintain quality control at every stage to ensure the reliability and safety of explosion-proof installations and renovations.
Shenzhen ZhongNuo Testing Technology Co., Ltd. offers explosion-proof construction and retrofitting consulting services, boasting a wealth of qualifications and case studies—worth it!
explosion-proof electrical retrofitting and on-site explosion-proof construction consulting services for hazardous explosive areas - Shenzhen Zhongnuo Inspection Technology Co., Ltd.