Máy phát xung sét dùng để kiểm tra xung sét.

Tóm tắt: Lightning-induced overvoltage and transient shocks caused by switching of large-capacity loads on power grids may damage the power and communication ports of electronic equipment. The lightning surge test is a mandatory test item to verify the electromagnetic immunity performance of electrical and electronic products. As core standard equipment for lightning surge test, the LISUN SG61000-5 lightning surge generator adopts a modular hardware architecture, with output voltage ranging from 0 to 30 kV and maximum short-circuit current up to 15 kA. It can accurately output open-circuit voltage waveforms of 1.2/50μs and 10/700μs, as well as short-circuit current waveforms of 8/20μs and 5/320μs, fully complying with domestic and international standards including GB/T 17626.5 and IEC 61000-4-5. The equipment is equipped with integrated voltage and current attenuator probes and a digital oscilloscope. Real-time waveform visualization is realized via the LCD touch screen without additional external test instruments, which greatly simplifies the whole operation procedure of lightning surge test and ensures that key waveform parameters such as rise time and half-peak time strictly meet standard tolerances. Taking the SG61000-5 series as the research object, this paper compares the output capacity of different models, elaborates the technical advantages of its modular design and built-in waveform acquisition system, sorts out application scenarios of lightning surge test in new energy, industrial control, communication and home appliance industries, and provides technical references for equipment selection of enterprise R&D laboratories and third-party testing institutions. 

Giới thiệu

Transient high-energy surge impacts generated by lightning induction, power grid switching and switching of capacitive and inductive loads can easily break down core components such as switching power supplies, communication chips and control circuit boards, resulting in equipment crash, burnout and even safety accidents. Therefore, electromagnetic compatibility immunity standards have been formulated worldwide, mandating that all listed electrical products complete the lightning surge test to verify the capability of power cables and signal lines to withstand transient surge shocks.

Traditional conventional surge generators have three major drawbacks. Firstly, the integrated hardware structure brings difficulties in expanding voltage/current ranges and cannot meet the requirements of lightning surge test at 30 kV high voltage and 15 kA large current. Secondly, waveform observation requires extra purchase of oscilloscopes and high-voltage differential probes, leading to complicated test wiring and numerous calibration procedures that easily introduce measurement errors. Thirdly, insufficient waveform output accuracy causes excessive deviation of rise time and half-peak time, and the lightning surge test reports produced will not be recognized by CE, 3C, FCC certification bodies.

LISUN SG61000-5 loạt máy phát sét adopts a modular design consisting of power modules, waveform modules and coupling/decoupling modules. It fully covers full-range lightning surge test working conditions from low voltage & small current at 4.8 kV to high voltage & large current at 30 kV. Equipped with an integrated waveform acquisition system for real-time surge waveform playback on the touch screen, it fundamentally solves the industry pain points of traditional equipment such as cumbersome testing, insufficient precision and poor expandability. It is widely applied in R&D and testing of new energy energy storage, industrial automation, communication base stations, LED lighting and household appliances.

Hình: Máy kiểm tra xung điện

Modular Architecture and Core Testing Advantages of LISUN SG61000-5 Máy phát điện sét

Modular Hardware Design to Cover Full-range Lightning Surge Test Requirements
SG61000-5 consists of five independent modules: high voltage generation module, current output module, waveform shaping module, built-in CDN coupling decoupling module and touch control main module. Each module can be replaced or upgraded separately. Enterprises can flexibly select models according to their own lightning surge test grade requirements without replacing the whole unit.

Voltage output ranges are classified hierarchically: basic model 0~6 kV, medium voltage model 0~10 kV, high voltage model 0~15 kV, customized extra-high voltage model 20 kV/30 kV. Short-circuit current is matched in full range from 2.4 kA to 15 kA, covering both low-voltage lightning surge test for consumer electronics and high-voltage large-current lightning surge test for photovoltaic inverters and high-power industrial control equipment. The equipment supports output of four standard compliant waveforms:

1. 1.2/50μs open-circuit voltage waveform & 8/20μs short-circuit current waveform: common combination wave for common-mode and differential-mode lightning surge test on power ports;
2. 10/700μs open-circuit voltage waveform & 5/320μs short-circuit current waveform: special waveforms for lightning surge test on communication lines, network cables and signal ports.

The tolerances of rise time and half-peak time for all waveforms are controlled within ±20%, satisfying the strict precision requirements for lightning surge test waveforms specified in national, European and American standards.

Built-in Waveform Acquisition System Simplifies Lightning Surge Test Operation Process

The core upgrade that distinguishes SG61000-5 from similar equipment on the market lies in integrated voltage and current attenuator probes and digital oscilloscope. The complete set of lightning surge test requires no additional external measuring instruments, with three core advantages as follows:

First, real-time waveform visualization. The 7-inch LCD industrial touch screen adopts an Android control system. After surge triggering, voltage and current waveform curves are loaded within milliseconds. Engineers can directly read front time, peak voltage and half-peak time to quickly judge whether waveforms meet standards on site, eliminating wiring and calibration steps for external oscilloscopes.

Second, measurement errors are greatly reduced. External probes suffer from cable attenuation and impedance mismatch. The built-in acquisition channel and high-voltage output loop adopt integrated shielding, and the shielding layer isolates space electromagnetic interference, improving the repeatability of waveform data obtained from kiểm tra sét đánh.

Third, automatic waveform archive storage. Each lightning surge test can simultaneously save waveform screenshots, test parameters, surge times and phase offset data. PDF original records can be exported with one click and directly attached to EMC test reports to meet data traceability requirements of third-party laboratories.

Specification Comparison Table of Lightning Surge Test Capacity for SG61000-5 Mô hình loạt

Different models adapt to lightning surge test working conditions for various industries and grades. Key output parameters are sorted out as follows:

As shown in the table, the full SG61000-5 series covers two categories of lightning surge test waveforms for power ports and communication ports with complete voltage and current gradients. Enterprises can select the standard SG61000-5 for conventional 6 kV lightning surge test, H15/H30 high-voltage models for high-voltage large-current testing of new energy equipment, and SG61000-5C for special testing of communication products. Multiple models from one brand can satisfy lightning surge test requirements for all types of products without purchasing multiple sets of equipment from different suppliers.

Industry Application Analysis of SG61000-5 for Lightning Surge Test

Pre-testing for R&D of Household Appliances and Information Technology Equipment
3C certification in China and CE certification in EU for home appliances, computer adapters and routers all require 2kV/4kV lightning surge test. In the R&D phase, enterprises conduct preliminary lightning surge test using standard SG61000-5. The touch screen displays real-time surge waveforms. If component breakdown or voltage drop occurs, the test can be suspended immediately to locate weak points of power input circuits and filter circuits. Surge protection devices such as TVS tubes and varistors can be added in advance to avoid failure in lightning surge test at third-party laboratories, saving repeated testing cycles and costs.

High-voltage Lightning Surge Test for New Energy Photovoltaic, Energy Storage and Charging Piles
Photovoltaic inverters, energy storage PCS and DC charging piles are installed in outdoor areas with high lightning risks. Standards require strict-grade lightning surge test at 10 kV/15 kV, corresponding to SG61000-5H và SG61000-5H15-SP models. Modular high-voltage modules can stably output large-current surge shocks. The built-in three-phase coupling decoupling network adapts to lightning surge test for three-phase AC and DC ports. The built-in oscilloscope can capture instantaneous voltage spikes of high-power devices and guide engineers to optimize overall lightning protection layout.

Lightning Surge Test for Signal Lines of Communication Equipment
Network ports of switches, security cameras and optical modems need to undergo special communication waveform lightning surge test of 10/700μs. The SG61000-5C is specially designed for communication test conditions. Symmetrical four-wire CDN realizes differential signal surge injection. The touch screen can collect weak surge current waveforms on communication lines to verify the withstand capability of network port lightning protection chips, meeting the requirements of lightning surge test specified in ITU-T K.20 communication lightning protection standard.

Standardized Lightning Surge Test for Third-party Testing and Certification Laboratories
Third-party certification bodies such as CQC, TÜV and SGS are widely equipped with the full SG61000-5 series for commercial lightning surge test. The equipment embeds standard limit databases of national standards, IEC and EN. Surge times, phase and polarity circulate automatically, and waveforms are archived automatically. The generated kiểm tra sét đánh reports with original waveform screenshots possess international certification validity and can be directly used for global market access. Equipped with optional accessories such as PD-E01 surge protection box and SG-DESK test bench, a complete and safe workstation for lightning surge test can be constructed.

Engineering Application Value of SG61000-5 Máy phát xung sét dùng để kiểm tra xung sét.

• Modular expansion reduces equipment investment cost: The modular architecture supports independent upgrade of high-voltage and current modules in the later stage. Enterprises only need to upgrade corresponding units according to product iteration instead of replacing the whole machine, meeting long-term demands of multi-gradient lightning surge test.

• Integrated waveform acquisition simplifies test procedures: External oscilloscopes and high-voltage probes are no longer required. A single operator can complete the whole set of lightning surge test, improving test efficiency by more than 50% and lowering calibration and maintenance costs of external instruments.

• High waveform accuracy ensures compliance of test reports: Strict tolerance control for four standard waveforms. The built-in acquisition system eliminates external measurement interference. Data obtained from lightning surge test can pass audits of major global certification bodies and prevent certification rejection.

• Full-industry multi-port coverage: Supports two types of lightning surge test including combination waves for power ports and long waveforms for communication lines. One unit realizes testing for both power-type and signal-type products, greatly reducing the quantity of equipment purchased by laboratories.

• Complete safety accessories avoid high-voltage risks: It can be matched with surge protection boxes, isolation transformers and special test benches to realize human-machine isolation during high-voltage lightning surge test and eliminate hidden dangers such as electric shock and equipment explosion.

Kết luận

Against the backdrop of increasingly strict EMC supervision, the kiểm tra sét đánh is a mandatory test procedure for all electrical and electronic products before market launch and export. Waveform accuracy, operation convenience and range coverage of test equipment directly determine testing efficiency and report validity. Featuring mature modular design, the LISUN SG61000-5 lightning surge generator achieves full-range output from 0~30 kV and 0~15 kA and supports two types of standard surge waveforms for power and communication applications. It innovatively integrates voltage and current attenuator probes and a digital oscilloscope, and realizes real-time waveform observation via the LCD touch screen, which greatly simplifies the whole operation flow of lightning surge test and guarantees that waveform parameters precisely meet tolerance requirements of GB/T 17626.5, IEC 61000-4-5 and other standards.

The series includes multiple sub-models adapting to different grades of lightning surge test for home appliances, IT, new energy, communication industries and third-party testing institutions. It has four core strengths: expandability, high precision, easy operation and high safety, effectively solving common industry problems of traditional surge test equipment such as insufficient measuring range, complicated wiring, waveform distortion and low certification pass rate. With the popularization of outdoor new energy and high-power power equipment, the SG61000-5H30-SP model supporting 30 kV ultra-high current will become mainstream equipment for strict high-voltage grade lightning surge test, providing standardized testing support for lightning protection design of domestic electronic products and global EMC certification.