The scope of locomotive position conversion switch 1: This standard specifies the usual usage conditions, rated parameters, technical requirements, test methods, test rules and markings, packaging of locomotive position conversion switches; Transportation and storage. This standard applies to locomotive position transfer switches used on railway electric locomotives, diesel locomotives, and multiple units. For special requirements that are different from this standard, they can be separately specified in the product technical conditions after consultation between the user and the manufacturer. 2 Normative References: The clauses in the following documents become clauses of this standard through reference in this standard. For dated references, all subsequent amendments (excluding corrected content) or revisions are not applicable to this standard. However, all parties who have reached agreements based on this standard are encouraged to investigate whether the latest versions of the following documents can be used. For undated references, the latest version applies to this standard. GB/T 2423.1-2001 Environmental Testing for Electrical and Electronic Products, Part 1: Test A: Low Temperature Test Method (idt IEC 60068-2-1:1990) GB/T 2423.4-1993 Basic Environmental Testing Procedures for Electrical and Electronic Products, Test Db: Alternating Damp Heat Test Method (egy IEC60068-2-30:1980) GB/T 2900.36-2003 Electrotechnical Terminology Electric Traction (IEC 60050-811:1991, MOD) GB/T 4207-2003 (IEC 60112:1979, IDT) Solid insulation materials - Determination of relative and resistance to electrical trace index under humid conditions - GB 4208-1993 Housing protection level (IP code) (eqv IEC 60529:1989) GB/T5169.12-1999 Fire hazard testing for electrical and electronic products - Test method: Glow wire ignitability test for materials (idtIEC 60695-2-12:1994) TB/T1333.1-2002 Railway applications - Electrical equipment for rolling stock - Part 1: General usage conditions and general rules (idt IEC 60077-1:1999) TB/T 1333.2-2002 Railway Applications, Electrical Equipment for Rolling Stock, Part 2: General Rules for Electrical Devices (idt IEC 60077-2:1999) TB/T 3058-2002 Railway Applications, Rolling Stock Equipment, Impact and Vibration Testing (idt IEC 61373; 1999)
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