I. Preparation of documents for applying for coal safety certification

1. Corporate Standards

2. Product Manual

3. Controlled Components Detail List

4. Detailed List of Key Components

5. Product Technical Documents (e.g., schematics, assembly drawings, PCB layouts, hydraulic diagrams, etc.)

Note: 1. The format of the company standard should comply with GB/T1.1-2002 "Guidelines for Standardization Work - Part 1: Structure and Writing Rules of Standards" and GB/T1.2-2002 "Guidelines for Standardization Work - Part 2: Methods for Determining Normative Technical Elements in Standards."

2. The format of the product manual should comply with GB9969.1-1998 "General Principles of Industrial Product Manuals"

Section II: Sample Preparation

The Manufacturing Department completes the prototype manufacturing according to the design drawings. The project team establishes the production inspection outline based on the company and industry standards. The Quality Assurance Department conducts the production inspection in accordance with the production inspection outline.

Note: In addition to preparing a prototype, electrical products also require electrical components for intrinsic safety testing, such as intrinsic safety power supplies, sensors, etc.; and electrical components for electrical performance testing, such as contactors, circuit breakers, disconnect switches, etc.

Section 3: Declaration Principles

1. Concurrent filing of similar products

2. Multiple products share the same coal safety component

3. Electrical equipment pre-notification and whole machine declaration

4. Product shaping followed by declaration

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