New GB/T Standard 17743-2021 for LED Drivers Coms Into Effect
28. July 2022CNCA has updated the GB/T 17743-2017 standard in 2021. On July 01, 2022, the new standard GB/T 17743-2021 for limits and methods for measuring radio disturbance characteristics of electric lighting and similar equipment became effective. This is equivalent to the IEC international standard CISPR 15:2018 and is an important test basis for electric lighting and similar equipment in terms of emission nuisance.
One of the most important changes relates to the test samples to be prepared for radiated electromagnetic interference tests. Instead of samples at 30MHz-300MHz, samples at 30Mhz-1GHz are now requested.
A detailed summary of the differences between the old and new standard can be found in the table below:
| Recommendations on the differences between test items and supplementary test requirements for GB/T 17743-2021 and GB/T 17743-2017 | ||||
| No. | Test items of GB/T 17743-2017 | Test items of GB/T 17743-2021 | Differences | Whether to supplement the test |
| 1 | Insertion loss | Replace with the disturbance voltage of the power connector | The original test item is a luminaire with insertion loss, except for products other than those that contain only passive control devices and are equipped with power factor correction capacitors or suppression capacitors (at least 47nF) between the power terminals and conduct conduction disturbance tests on the power interface. | NO |
| 2 | The power terminals disturb the voltage | Disturbance voltage of the power connector | No difference | NO |
| 3 | Control terminal disturbance voltage | Conducted disturbance voltage of wired network interfaces other than power supply | Add the limits and measurement methods of the current probe | NO |
| 4 | Load terminal disturbance voltage | Disturbance voltage of the local wired port | Two types of “local wired ports” are distinguished. Respectively: a) The EUT interface that is indirectly connected to the network through peripherals (this includes the power interface of the ELV lamp). |
NO |
| b) Not directly or indirectly connected to the network and may be connected to the length of the cable equal to or greater than 3m of the EUT interface. Add current probe: limits of the head and measurement method. |
YES: The EUT interface of a cable with a length equal to or greater than 3m can be connected, and the disturbance voltage test of the local wired port needs to be added. | |||
| 5 | Radiated Electromagnetic Disturbance (9kHz~ ~ 30MHz) | Enclosure Port Radiation Disturbance (9kHz~ ~ 30MHz | 1. There is no difference when testing with the LLAS system. 2. When the EUT sample size is greater than 1.6 m, it can be measured using a 60 cm ring antenna while giving new limits. 3. Products that will produce a large magnetic dipole moment have changes in the measurement arrangement when performing this test. For example (but not limited to) the following: a. The manufacturer allows an external wired interface to the EUT via a single wire: b. The EUT employs an internal single conductor and a separate interconnected wiring (or PCB trace), resulting in loops and associated magnetic dipoles: Application of inductive, type energy transfer technology EUT. | NO |
| 6 | Radiated Electromagnetic Disturbance (30MHz~ 300MHz) | Enclosure Port Radiation Disturbance (30MHz~ 1GHz | Frequencies are extended from 300 MHz to 1 GHz, introducing a variety of radiation disturbance limits and related measurement methods. For improved reproducibility, when measuring using OATS, SAC, or FAR methods, the EUT’s power cable should be terminated using a CDNE located on the reference: test ground level (if applicable), and the receiver port of the CDNE should be terminated with an impedance of 50 Ω. | YES |
| Radiated Electromagnetic Disturbance (CDN Act (30MHz~ 300MHz)) | Radiated electromagnetic disturbance of enclosure port (CDNE method (30MHz~ 300MHz)) | The CDN method was updated to CDNE testing, adding a limit condition: only suitable for the maximum size is 3 mX 1mX1m (length X width X height), clock frequency < 30MHz EUT, and the rated voltage does not exceed 6o0v, EUT is not more than 2 cables). If the CDNE test fails, other methods and associated limits can still be applied. | ||
If you are unsure whether your product falls under the CCC certification obligation or is affected by the changes, please do not hesitate to contact us. An overview of the product groups for which certification is relevant can be found here.
Our CCC certification brochure also provides a detailed overview of the certification.
Please contact us with any questions about the new regulations, voluntary China certification or China CCC SDoC.
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