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The main difference between increased safety "e" and non sparking "nA" explosion-proof motors

The increased safety type "e" motor and the spark free type "nA" motor are very similar in general structure, and even in terms of test items and inspection requirements, they are quite similar. Many people cannot accurately distinguish the requirements of these two explosion-proof types of motors. ……

Requirements for metal wall thickness around blind holes on explosion-proof enclosures

According to Article 11.6 of GB 3836.2-2010, for screw holes or double headed bolt holes that do not penetrate the explosion-proof shell wall, the remaining thickness of the explosion-proof shell wall should be at least one-third of the diameter of the bolt or double headed bolt, with a minimum of 3mm. Q： Does the 'rem……

What documents are required for SIL level assessment?

List of documents submitted for SIL certification level pre assessment: 1. Product user manual 2. Product safety function list 3. Product safety manual 4. Failure mode analysis (FMEDA) 5. Quality management system certification (ISO9001 certificate) 6. Product photos (including front and side photos of representative m……

What is the difference between explosion-proof and increased safety explosion-proof electrical equipment?

The explosion-proof principle of explosion-proof electrical equipment is designed according to GB 3836.1 and GB 3836.2 standards. Electrical components are installed inside a shell with explosion-proof performance, which can withstand explosive mixtures entering the interior of the shell through any joint surface or st……

Can explosion-proof products use plastic shells?

The commonly used explosion-proof shells are mostly made of metal materials. Can we use plastic to make explosion-proof shells? Explosion proof products can use plastic as the shell, but because the strength of plastic is not as high as that of metal, the plastic shell of the same product is generally thicker than the ……

Why do products need explosion-proof certification?

Explosion proof certification refers to the use of equipment to determine compliance with explosion-proof standards, requiring the issuance of relevant certificates of conformity for type testing, mainly targeting Ex equipment or Ex components. Explosion proof products mostly refer to explosion-proof electrical product……

How much does it cost to obtain ATEX explosion-proof certification?

How much does it cost to obtain ATEX explosion-proof certification? This issue is also a concern for many companies, as they need to consider the cost of the product. Next, Zhongnuo Testing will explain to you how ATEX explosion-proof certification is charged? According to EU regulations, ATEX certification fees mainly……

What are the ATEX certification modes?

ATEX certification is the explosion-proof directive of the EU CE certification. The old directive was (94/9/EC), and the new ATEX directive 2014/34/EU. The ATEX certification is applicable to a wide range of equipment, including fixed offshore platforms, petrochemical plants, flour mills, and other potentially explosiv……

What is the difference between SIL2 and SIL3 certification?

SIL certification is a third-party evaluation, verification, and certification of the safety integrity level (SIL) or performance level (PL) of safety equipment based on standards such as IEC 61508 (GB/T 20438), IEC 61511 (GB/T 21109), IEC61513, IEC 13849-1, IEC 62061, and IEC 61800-5-2. Functional safety certification……

The standard system for SIL certification

The international standards for SIL certification started early and are relatively systematic, generally divided according to different industries. For example, IEC61511 for the process industry, IEC61513 for the nuclear power industry, ISO26262 for the automotive industry, IEC62061 for the robotics industry, EN50126 f……