This part of GB 7251 specifies the definition, usage conditions, structural requirements, technical characteristics, and verification requirements of low-voltage switchgear and control equipment (hereinafter referred to as complete equipment) (see 3.1.1). This section cannot be used separately to specify a complete set of equipment or to determine consistency. The complete equipment should comply with the relevant parts of the GB 7251 series; Starting from Part 2. This section only applies to low-voltage switchgear and control equipment that meet the requirements of the following relevant complete equipment standards: - Complete equipment with rated voltage AC not exceeding 1000 V and DC not exceeding 1500 V--- Fixed or mobile complete sets of equipment with or without casing; - complete sets of equipment used in conjunction with equipment for power generation, transmission, distribution, and energy conversion, as well as equipment for controlling energy consumption; - complete sets of equipment designed for special usage conditions, such as those used in ships and locomotives, as long as they meet other relevant specific requirements; Note 1: GB/T 7061 includes supplementary requirements for complete sets of marine equipment-- A complete set of equipment designed for the electrical equipment of a machine, assuming compliance with other relevant specific requirements. Note 2: The GB 5226 series standards contain supplementary requirements for complete sets of equipment that form part of the machine. This section applies to complete sets of equipment that are designed, manufactured, and validated in one go or fully standardized for mass production. The production and/or assembly may not be carried out by the initial manufacturer (see 3.10 1) . This section does not apply to individual components and packaged components that comply with their respective product standards, such as motor starters, knife fuse switches, electronic devices, etc
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China