Scope
This part of GB/T 4074 specifies the following test methods:
- Test Method 12: Solvent Resistance
- Test Method 16; Cold resistant agent
- Test Method 17: Direct Solderability
- Test Method 20: Resistance to hydrolysis and transformer oil Please refer to GB/T 4074.1 for a list of definitions, general test methods, and winding wire test methods
&Nbsp&Nbsp; Normative reference documents
The clauses in the following documents are referred to in this part of GB/T4074 and become the clauses of this part. For dated reference documents, all subsequent amendments (excluding errors) or revisions do not apply to this section. However, parties to agreements based on this section are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest version applies to this section
GB/T 4074.1 Test Methods for Winding Wires, Part 1: General Provisions (GB/T 4074.1-2008, IEC 60851-1:1996, IDT)
GB/T 4074.3-2008 Test Methods for Winding Wires: Part 3: Mechanical Properties (IEC 60851-3:1997, IDT)
GB/T 4074.5-2008 Test Methods for Winding Wires - Part 5: Electrical Properties (IEC 60851-5; 2004, IDT)
IEC 60296:1982 Specification for unused mineral insulating oils for transformers and switchgear
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