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Harmonic flicker test
What is harmonic current?
In a broad sense, since the effective component of the AC power grid is a single frequency, any component that is different from the power frequency can be called a harmonic. At this time, the meaning of the word "harmonic" has become somewhat inconsistent with the original meaning. It is precisely because of the generalized concept of harmonics that there are "fractional harmonics", "inter-harmonics", "sub-harmonics" and so on.
Causes of harmonics:
Since the sinusoidal voltage is applied to the nonlinear load, the fundamental current is distorted to produce harmonics. The main nonlinear loads include UPS, switching power supply, rectifier, frequency converter, inverter, etc.
harmonic current hazards:
1, reduce the system capacity such as transformers, circuit breakers, cables, etc.; Accelerate the aging of equipment, shorten the service life of equipment, and even damage the equipment;
2, endanger production safety and stability;
3, waste of electricity, etc.
Content and Technology of Harmonic Current Test
Harmonic current test basis standard
IEC 61000-3-2/GB 17625.1: Limits for harmonic currents emitted by low-voltage electrical and electronic equipment (equipment input current ≤ 16A per phase);
Harmonic current in the field of electromagnetic compatibility
The (power grid) harmonic current studied in the field of electromagnetic compatibility (EMC) refers to the sinusoidal current component of a multiple of the nominal power frequency of the power supply grid, such as the power grid frequency f = 50Hz, the second harmonic f = 100Hz, the third harmonic f = 150Hz, the fourth harmonic f = 200Hz, etc. The harmonic current frequency range studied is generally 2 to 40 times, assuming that k is an integer starting from 2, the sinusoidal component of the fundamental k-octave is called the k-th harmonic, and the harmonic is actually a disturbance that "pollutes" the power grid ".
Tianhai Inspection Technical Service Support
Tianhai detection adopts the latest AMETEK CI harmonic test system, which can fully meet the test of A,B,C and D products. It also supports the latest version of the harmonic standards such as the EN IEC 61000-3-2:2019 standard.
Tianhai testing capability advantage
Tianhai Testing has a testing and certification testing laboratory and a relatively comprehensive qualification. Whether it is product pre-testing or certificates or reports, we can test and issue certificates in time.
Tianhai Testing has professional rectification engineers. If the product fails the test, our rectification engineers can provide technical support and suggestions. Ensure that the product passes the rectification once.
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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传导骚扰测试
Conduction immunity test
Electric fast pulse
Voltage drop test
传导骚扰测试
Conduction immunity test
Electric fast pulse
Voltage drop test
ENTERPRISE ADVANTAGE
Inspection Guarantee
Inspection and Testing Agency Qualification Certificate (CMA), American Laboratory Accreditation Association (A2LA); Government-approved third-party testing service agencies, in strict accordance with national standards for testing, issued a report with legal effect.
Quickly get the certificate.
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.
Testing Laboratory
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, A2LA and other qualifications;
Enterprise strength
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 A2LA certificates, has been recognized by UL, TUV, Intertek, TIMCO, FCC, EMCC, NEMKO, SGS, etc. in the United States, serving the world.
