Research on Technical Characteristics and Application of Modular Lightning Surge Test

Abstract: In the field of electromagnetic compatibility testing, lightning surge test is the core instrument to evaluate the capability of electrical and electronic equipment to resist transient interference caused by lightning strikes. Traditional surge test equipment has shortcomings such as fixed model configuration, low functional integration and reliance on external auxiliary instruments, which fail to meet the diversified testing requirements of various scenarios and specifications. Adopting standardized modular design, LISUN SG61000-5 series lightning surge test can flexibly cover the full-range output requirements of voltage and current with the maximum voltage of 0~30KV and maximum current of 0~15KA. It is compatible with various mainstream standard surge waveforms stipulated by domestic and international standards. Equipped with built-in voltage and current attenuator probes and electronic oscilloscope, the device can directly display output waveforms via LCD touch screen without additional external instruments. It greatly simplifies the test operation process and ensures that all waveform parameters strictly comply with standard requirements. This paper analyzes the modular architecture, waveform output capability, integrated functional design and technical parameters of this series of lightning surge test, and discusses its application value in electromagnetic compatibility detection.

Introduction

Natural lightning strikes and switching of large-capacity loads will generate high-energy transient surges, which are likely to damage the power lines and internal circuits of electrical and electronic equipment. To verify the anti-surge interference capability of products, the industry carries out surge immunity tests in accordance with GB/T17626.5, IEC 61000-4-5, EN61000-4-5 and other standards, and lightning surge test is the special equipment for such tests.

Figure: Surge generator

With the development of electronic industry, the types of tested equipment keep increasing, ranging from small consumer electronics and communication devices to high-power industrial electrical appliances, which put forward differentiated requirements for voltage, current gears and waveform types of surge tests. Most of the early lightning surge test devices are fixed-parameter models with narrow range coverage and poor scalability. In addition, external oscilloscopes and detection probes are mandatory for waveform observation, leading to complex wiring, high operation threshold and signal errors easily introduced by external circuits. Against this backdrop, the new generation of lightning surge test featuring modularization, integration and full-range performance has become the mainstream in the industry, and LISUN SG61000-5 series is a representative product in this category.

Modular Design and Full-range Output Capacity

LISUN SG61000-5 lightning surge test adopts mature modular design concept. Through the flexible combination of power modules, waveform generation modules and impedance matching modules, a variety of subdivided models are derived, fully covering the output demands of different voltage and current levels and meeting the test standards of civil, industrial, communication and other fields.

The maximum output voltage range of this equipment reaches 0~30KV, and the maximum output current is 0~15KA. Different models adopt gradient range distribution, which is applicable to both conventional tests with low voltage and low current and severe-level tests with high voltage and high current. Meanwhile, the device is equipped with switchable output impedance modules, supporting multiple impedance gears including 2Ω, 12Ω, 15Ω, 40Ω and 500Ω to match the impedance requirements of different test lines such as power lines and communication lines. The modular structure not only makes equipment selection more flexible, but also facilitates later maintenance, parts replacement and function upgrading, effectively reducing equipment operation and maintenance costs.

Standard Waveform Output and Parameter Accuracy

Waveform accuracy is the core indicator to measure the performance of lightning surge test. In strict accordance with relevant electromagnetic compatibility standards, LISUN SG61000-5 lightning surge test supports the output of multiple classic surge waveforms. For open-circuit voltage waveforms, it can generate 1.2/50μs and 10/700μs with the error controlled within ±20%. The corresponding short-circuit current waveforms are 8/20μs and 5/320μs standard waveforms, which fully adapt to two mainstream test scenarios: power line surge and communication line surge.

Different models are designed for targeted waveform combinations. Conventional models mainly adopt the combination of 1.2/50μs (open-circuit voltage) and 8/20μs (short-circuit current), suitable for power line tests of most electrical equipment. The SG61000-5C model is configured with 10/700μs and 5/320μs waveforms, specially used for communication line surge detection. The internal circuit of the equipment is precisely calibrated. The surge times can be set from 1 to 9999 times, and it supports positive polarity, negative polarity and automatic polarity switching with the phase shift range of 0°~360°. Both asynchronous and synchronous test modes are available to fully meet various working condition requirements specified in standards.

Integrated Functional Design for Simplified Test Operation

The traditional surge test system needs to be equipped with additional external devices such as oscilloscopes and voltage & current probes, which results in complicated wiring, time-consuming commissioning and potential impact on test results caused by incompatibility of external equipment. LISUN SG61000-5 lightning surge test is optimized with integrated design, and the built-in voltage and current attenuator probes and electronic oscilloscope are its core highlights.

Operators do not need to build external testing instruments. They can directly view the complete output voltage and current waveforms in real time and read key parameters including waveform rise time, duration and peak value through the built-in LCD touch screen. The device is equipped with Android system for simple and intuitive touch operation. Parameter setting, waveform viewing and data recording can all be completed on a single interface, which thoroughly simplifies the test operation process. The integrated design not only improves test efficiency, but also avoids signal attenuation and electromagnetic interference caused by external circuits, further guaranteeing the accuracy of waveform parameters and ensuring test results comply with standard specifications.

Summary of Core Technical Parameters

The table below shows the core parameters of mainstream models of LISUN SG61000-5 series lightning surge test, which intuitively reflects the modular range division and functional differences of the series:

Conclusion

With modular design, LISUN SG61000-5 series lightning surge test realizes full coverage of voltage and current range and can meet surge test requirements of multiple industries and standards. The device supports the output of various internationally standard surge waveforms, with parameter errors strictly controlled within the allowable range of standards and reliable test accuracy. The integrated design with built-in attenuator probes and electronic oscilloscope breaks the limitation that traditional devices rely on external instruments. It simplifies operation procedures and optimizes the test environment while taking practicability and convenience into account.

This lightning surge test can operate stably in scenarios such as electromagnetic compatibility certification, product R&D and quality inspection, as well as laboratory testing. As electrical equipment puts forward higher requirements on electromagnetic anti-interference capability, lightning surge test with modularization, integration and high precision will continue to be the core equipment in the field of electromagnetic compatibility testing, and safeguard the safety performance of various electronic products.