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Sample size: choose to send samples or visit according to the sample size

Display style: electronic version

Testing cycle: 3-15 working days (urgent)

Testing items:

Permissible deviation of three-phase power supply voltage of 10kV and below, absorption ratio measurement, no-load loss and no-load current measurement at 90% and 110% rated voltage, external withstand voltage test, induced withstand voltage test, short-circuit impedance and load loss measurement.

, Measurement of no-load loss and no-load current, measurement of DC insulation resistance between windings and between windings, AC withstand voltage test, voltage ratio measurement and connection group label verification, measurement of no-load current and no-load loss, measurement of DC resistance of windings, insulation resistance test, external withstand voltage test (routine test), temperature rise test, voltage ratio measurement (routine test), voltage vector relationship calibration (routine test), short-term induction withstand voltage test, Short circuit impedance and load loss test (routine test), measurement of no-load loss and no-load current (routine test), winding resistance measurement (routine test), insulation resistance measurement, lightning impulse test, voltage ratio measurement and connection group label verification test, short circuit withstand capacity test, short circuit impedance and load loss test, no-load current and no-load loss test, winding DC resistance test, winding insulation resistance measurement test, external withstand voltage test, Induced voltage withstand, temperature rise, voltage ratio and connection group, winding DC resistance, insulation resistance, load loss, lightning impulse test (full wave and truncated wave), sound level measurement, insulation oil test, voltage ratio measurement and connection group label verification, winding resistance measurement, transformer ratio, appearance inspection, current resistance, line end lightning full wave impulse withstand voltage test, voltage ratio measurement and connection group label, winding resistance, all items, winding to ground and winding to winding capacitance measurement, Dielectric Loss Factor (tan) of Insulation System Capacitors δ） Measurement (applicable to oil immersed transformers), pressure sealing test for liquid immersed transformers, partial discharge measurement, DC insulation resistance measurement between windings and ground, absorption ratio measurement, DC resistance measurement, impulse voltage test, external voltage test, partial discharge test, DC resistance imbalance rate measurement, transformer oil dielectric loss factor measurement, transformer oil breakdown voltage measurement, maximum temperature of casting body of dry-type transformer winding, Permissible deviation of 220V single-phase voltage

Detection standards:

1. JB/T501-2006 "Guidelines for Testing Power Transformers" 8

2. GB 1094.11-2007 "Power Transformers - Part 11: Dry Transformers" 2.3, 11.1

3. GB 1094.11-2007 Power Transformers - Part 11: Dry Transformers

4. GB/T 16927.1-2011 High Voltage Testing Techniques - Part 1: General Definitions and Test Requirements 7

5 GB 50150-2016 Electrical Equipment Installation Engineering Electrical Equipment Handover Test Standard 8.0.4

6. GB/T 22072-2008 Technical Parameters and Requirements for Dry Amorphous Alloy Iron Core Distribution Transformers 6

7. GB/T 1094 11-2007 Power Transformers Part 11: Dry type Transformers 16

8. DL/T 267-2012 Technical Conditions for Use of Oil Immersed Fully Sealed Coiled Iron Core Distribution Transformers

9. GB 1094.2-2013 Power Transformers Part 2: Temperature Rise 7.1

10. GB/T1094.3-2017 Power Transformers Part 3: Insulation Level, Insulation Test, and External Insulation Air Gap 10

11 GB/T 1094.7-2008 Power Transformers Part 7: Load Guidelines for Oil Immersed Power Transformers 8

12, GB/T 1094.4-2005 Power Transformers Part 4: Lightning Impulse and Operating Impulse Test Guidelines for Power Transformers and Reactors 7

13, GB/T 6451-2015 Technical Parameters and Requirements for Oil Immersed Power Transformers 5.3.3

14, GB 1094.3-2017 Power Transformers Part 3: Insulation Level Insulation Test and External Insulation Air Gap 12

15, GB/T 25289-2010 Technical Parameters and Requirements for 20kV Oil Immersed Distribution Transformers 7

16, GB/T 1094.11-2007 Power Transformers Part 11: Dry Transformers 19

17, GB/T 7354-2018 High Voltage Test Technology Partial Discharge Measurement

18, GB/T 1094.3-2017 Power Transformers Part 3: Insulation Level, Insulation Test and External Insulation Air Gap 10

19 JB/T 10544-2006 Underground Transformers 7

20, GB/T 25438-2010 Technical Parameters and Requirements for Three Phase Oil Immersed Three Dimensional Coiled Iron Core Distribution Transformers 4

Testing Report Function:

1. Project Bidding: Provide authoritative third-party CMA/CNAS qualification reports 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 reassure consumers 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 process problems