Voltage Fluctuation and Flicker Test
  • Voltage Fluctuation and Flicker Test

Voltage Fluctuation and Flicker Test


Voltage Fluctuation and Flicker Detection Introduction: Due to the extensive use of switching power supplies in electronic products, while improving the efficiency of power supply, a large amount of harmonic current will be injected into the power grid due to nonlinear power conversion, which will not only interfere with other equipment in the same power grid, but also overload the centerline current of the power grid and affect the transmission capacity. In addition, the phase control of the power supply will also cause changes in the effective value current of the power grid, resulting in fluctuations in the effective value voltage of the load side, causing the lights of the lighting fixtures to flicker.

Pressure Fluctuation and Flicker Test Basis Standard

IEC 61000-3-3/GB 17625.2: Limitation of voltage fluctuation and flicker in low voltage power supply system for equipment with rated current not more than 16A;

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Voltage Fluctuation and Flicker Test

The change in the grid voltage caused by the EUT is mainly measured. The interference effect of voltage change depends not only on the amplitude of voltage change, but also on the frequency of its occurrence. Voltage change is usually evaluated by two indicators, namely voltage fluctuation and flicker.

The voltage fluctuation index reflects the sudden large voltage change, while the flicker index reflects the continuous voltage change over a period of time. In the voltage fluctuation and flicker circuit, the reference impedance Z (at 50Hz) of the power supply S consists of: RA = 0.24 Ω,jXN = 0.15 Ω;RN = 0.16 Ω,jXN = 0.10 Ω.

detection technology

Tianhai detection harmonic current test system adopts the new test system of American AMETEK CI, which can meet the new version of harmonic current, voltage fluctuation and flicker test.

Tianhai Testing Laboratory


Tianhai testing is set up and operated in accordance with the laboratory accreditation system specification ISO 17025. The testing instruments are made up of Germany's Rohde & Schwarz, Switzerland's EMTEST, YYOKOGAWA, Agilent, Tektronix and other world's top instrument manufacturers. The equipment is advanced and sophisticated, the site environment control is reliable, traceability is strong, the technical team is senior and efficient, and close cooperation with international authoritative organizations is maintained.

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55 engineers with more than 10 years of experience in EMC design and rectification, quickly out of the design; The introduction of German RS,SCHWARZBECK and Swiss TESEQ imported precision instrument testing, 24-hour operation, short test cycle, half an hour out of the program, 3 days to get the report.

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Has EMC electromagnetic compatibility, safety laboratory, 966 anechoic chamber, automotive electronics laboratory, medical electronics testing laboratory, 5G RF CCC laboratory, RF laboratory, private anechoic chamber laboratory, providing a wide range of testing; The laboratory has won CMA, CNAS, A2LA and other qualifications;

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15 years of industry experience, deep-rooted in the field of electromagnetic compatibility, efficient solution to product electromagnetic compatibility and other issues; National high-tech enterprise, with CMA and CNAS certificates, has been recognized by UL, TUV, Intertek, TIMCO, FCC, EMCC, NEMKO, SGS, etc. in the United States, serving the world.

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