Baijian Testing is a third-party testing agency that provides enterprises with relevant CNAS, CMA, CAL and other qualification certification testing reports. We always take the enterprise as the first and customer as the center, carry out testing work under strict procedures, provide customers with product testing and quality control solutions, and wholeheartedly provide scientific and scientific inspection, research and development analysis services for our customers

Testing process

1. Sending samples

2. Checking requirements

3. Targeted quotation

4. Both parties confirm, sign a contract, and start the experiment

5. Completing the experiment: The testing cycle (can be expedited) may change according to the sample and its testing items/methods, and engineers can be consulted

6. Issuing the testing report and providing post service.

Testing items:

Partial parameters, zero sequence impedance measurement of three-phase transformers, sealing test of tap changer, measurement of no-load loss and no-load current at 90% and 110% rated voltage, sound level measurement, insulation test under minimum oil level conditions, on load tap changer test, oil tank cracking test, pressure deformation test of liquid immersed transformer, pressure sealing test of liquid immersed transformer, insulation inspection of iron core and clamp of liquid immersed transformer, temperature rise test.

, Voltage ratio measurement and connection group label verification, short-term overload capacity test, short-circuit impedance and load loss measurement, no-load loss and current measurement, DC insulation resistance measurement of winding to ground and winding to winding, capacitance measurement of winding to ground and winding to winding, hot spot temperature rise measurement of winding, winding resistance measurement, insulation routine test, insulation type test, dielectric loss factor measurement of insulation system capacitor, transportation bumping test, all items, tap changer test, Power frequency withstand voltage test, lightning impulse test, insulation special test, internal current transformer ratio and polarity test, sealing test, all parameters, measurement of no-load current and no-load loss, dielectric loss factor of insulation system capacitor (tan) δ） Measurement, insulation liquid test, harmonic measurement of no-load current, on-site vacuum sealing test of liquid immersed transformer, power measurement of fan and oil pump motor, induction withstand voltage test, no-load loss and no-load current measurement at 90% and 110% rated voltage, external withstand voltage test, measurement of insulation resistance of winding to ground and/or dielectric loss factor of insulation system capacitance, frequency response measurement, insulation inspection of iron core and clamp of liquid immersed transformer, lightning chopped wave impulse test, Pressure sealing test for inflatable transformer oil tank, measurement of sound level for each cooling method, measurement of dissolved gas in insulation liquid, vacuum deformation test for liquid immersed transformer, measurement of DC insulation between windings and ground, measurement of transient voltage transmission characteristics, short circuit withstand capacity test, mechanical test or evaluation of oil tank transportation adaptability, measurement of no-load loss and no-load current at 90% and 110% rated voltage, measurement of no-load loss and no-load current, Measurement of transportation quality, external coating inspection, lightning impact test, mechanical strength test, no-load current harmonic, zero sequence impedance of three-phase transformer, noise measurement, winding to ground insulation resistance measurement, absorption ratio measurement (R60/R15), insulation oil test, on load tap changer test - operation test, marking, packaging, transportation and storage, on load capacitance (voltage) switch live and no-load switching test, zero sequence impedance measurement

Detection standards:

1 JB/T10778-2013JB/T10778-2020 three-phase oil immersed regulating transformer

2. JB/T10778-2007 three-phase oil immersed regulating transformer 8.1 8.2

3. GB/T1094.1-2013 Power Transformers Part 1 General Principles

4. JB/T 10778-2020 three-phase oil immersed regulating transformer JB/T 10778-2020

5. JB/T 10778-2020 three-phase oil immersed regulating transformer

6. JB/T 10778-2013 JB/T 10778-2020 three-phase oil immersed regulating transformer

p>7 JB/T 10778-2007 Three Phase Oil Immersed Capacity Regulating Transformers

8. GB/T 1094.3-2017 Power Transformers Part 3: Insulation Levels, Insulation Tests, and External Insulation Air Gap GB/T 1094.3-2017

9. GB/T 6451-2015 Technical Parameters and Requirements for Oil Immersed Power Transformers GB/T 6451-2015

10. GB/T 1094.1-2013 Power Transformers Part 1: General GB/T 1094.1-2013

11 JB/T 10778-2007 Three Phase Oil Immersed Capacity Regulating Transformer JB/T 10778-2007

Testing Process

1. Send Samples

2. Check Requirements

3. Targeted Quotation

4. Both parties confirm and sign the contract to start the experiment

5. Complete the experiment: The testing cycle (can be expedited) may change according to the sample and its testing items/methods, and engineers can be consulted

6. Issue a testing report and provide post service