General technical conditions for high-voltage testing equipment - Part 8: On load tap changer tester 1 Scope DL/T 846- This part specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, etc. of on load tap changer (on load voltage regulation) tester for power transformers. This section is applicable to the production and inspection of on load tap changer (on load voltage regulation) switch testers for power transformers using the DC method. 2 Normative references The following standards are essential for the application of this standard. For dated reference standards, only the dated version applies to this standard. For undated references, the latest version (including all amendments) applies to this standard. GB/T 191 Packaging, Storage and Transport Graphical Symbols GB/T 6587-2012 General Specification for Electronic Measuring Instruments GB/T 11463-1989 Reliability Testing of Electronic Measuring Instruments GB/T 17626.2 Electromagnetic Compatibility Testing and Measurement Techniques Electrostatic Discharge Immunity Testing GB/T 17626.3 Electromagnetic Compatibility Testing and Measurement Techniques, Radio Frequency Electromagnetic Field Radiation Immunity Testing GB/T 17626.4 Electromagnetic Compatibility Testing and Measurement Techniques Electrical Fast Transient Pulse Group Immunity Test GB/T 17626.5 Electromagnetic Compatibility Testing and Measurement Techniques - Surge (Impulse) Immunity Testing GB/T 17626.6 Electromagnetic Compatibility Testing and Measurement Techniques - Conducted Disturbance Immunity Induced by RF Fields GB/T 17626.8 Electromagnetic Compatibility Testing and Measurement Techniques - Power Frequency Magnetic Field Immunity Testing GB/T 17626.11 Electromagnetic Compatibility Testing and Measurement Techniques - Voltage Dips, Short Interruptions, and Voltage Variations - Immunity Testing GB/T 18268.1-2010 Measurement Electrical equipment for control and laboratory use, electromagnetic compatibility requirements, Part 1: General requirements 3 Terms and definitions 3 The following terms and definitions apply to this document. 3.1 On load tap changer is a device that adjusts the tap position of the winding to change the system operating voltage under transformer operating conditions. 3.2 Transition resistance A current limiting resistor that bridges between two tap positions during the transition of a tap switch from one tap position to another
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