During the online inspection process of insulators using the insulation resistance method, the measurement of insulation resistance is achieved through the measurement of leakage current. High voltage transmission insulators are generally composed of disc suspension insulators with simple structure, high mechanical strength, low aging rate, and can be used on transmission lines of any voltage level after being connected in series. Their equivalent circuit can be represented by RC series parallel circuit. 2. Electric field measurement method: Composite insulators on high-voltage lines can be simplified as continuous insulation materials sandwiched between two metal electrodes, and the umbrella skirt of the insulator has no effect on the distribution of the electric field. In this simplified model, the variation curve A of electric field strength and potential along the axis of the insulator calculated based on electric field theory slides during normal times; When there is a continuity defect in the insulator, the potential at that point becomes a constant, with distortion at the corresponding position, sinking in the middle, and rising at both ends. Therefore, measuring the axial electric field distribution of composite insulator strings can identify internal insulation continuity faults of insulators. 3. Pulse current method The so-called pulse current method is to determine the insulation condition of insulators by measuring the corona pulse current of insulators
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