Abstract
With the widespread application of DC-powered electronic and electrical equipment in fields such as industrial control, automotive electronics, and renewable energy systems, the stability and reliability of these devices under abnormal power supply conditions have become crucial. Voltage dips and short interruptions at the DC power input port are common electromagnetic disturbance scenarios that can lead to equipment malfunction, data loss, or even permanent damage. To evaluate the immunity of DC-powered equipment to such disturbances, specialized testing equipment is essential. This paper focuses on the Voltage Dips and Interruptions Testers, with a specific analysis of the LISUN CSS61000-29 DC Voltage Dips and Interruptions Generator. It details the design characteristics, technical specifications, compliance standards, and application scenarios of this high-reliability device, providing a comprehensive reference for engineers and researchers engaged in electromagnetic compatibility (EMC) testing of DC-powered equipment. The technical parameters of the LISUN CSS61000-29 series are presented in a tabular format to facilitate clear comparison and understanding, and the working principle of the tester is explained to highlight its role in ensuring accurate and repeatable immunity tests.
1. Introduction
In modern electrical and electronic systems, DC power supplies are widely used due to their stable output and compatibility with a large number of electronic components. However, the DC power input port of equipment is often exposed to various electromagnetic disturbances, among which voltage dips and short interruptions are the most frequent and impactful. A voltage dip refers to a sudden reduction in the DC input voltage that lasts for a certain period, while a short interruption is a complete loss of voltage for a short time. These disturbances can be caused by factors such as power grid fluctuations, load switching, and fault conditions in the power supply system. For critical equipment like industrial controllers, automotive ECUs, and solar inverters, even a brief voltage dip or interruption can result in serious consequences, such as production line shutdowns, vehicle system failures, or reduced energy conversion efficiency.
To ensure that DC-powered equipment can withstand such disturbances and maintain normal operation, international and national standards have been established to specify the requirements and test methods for voltage dip and interruption immunity. Voltage Dips and Interruptions Testers are dedicated devices designed to simulate these disturbance scenarios, enabling EMC test engineers to evaluate the immunity performance of equipment under controlled laboratory conditions. The LISUN CSS61000-29 DC Voltage Dips and Interruptions Generator, developed by LISUN Group (https://www.lisungroup.com/products/emi-and-emc-test-system/dc-voltage-dips-and-interruptions-generator.html), is a representative high-reliability product in this field. It is specifically designed to meet the characteristics and requirements of EMS (Electromagnetic Susceptibility) measurement for DC power input ports, complying with international standards and providing accurate, stable, and repeatable test results. This paper will conduct an in-depth analysis of this Voltage Dips and Interruptions Tester, covering its design features, technical parameters, compliance standards, working principle, and application scenarios.
2. Compliance Standards for DC Voltage Dip and Interruption Immunity Testing
Before delving into the details of the LISUN CSS61000-29 Voltage Dips and Interruptions Tester, it is essential to understand the relevant standards that govern DC voltage dip and interruption immunity testing. These standards define the test levels, test procedures, and performance criteria, ensuring the consistency and comparability of test results across different laboratories and manufacturers.
The core standards for DC voltage dip, short interruption, and voltage variation immunity tests are:
• IEC 61000-4-29: This international standard, published by the International Electrotechnical Commission (IEC), specifies the test methods and equipment requirements for evaluating the immunity of electrical and electronic equipment to voltage dips, short interruptions, and voltage variations on DC input power ports. It covers a wide range of DC-powered equipment and defines different test levels based on the severity of the disturbance.
• EN 61000-4-29: This is the European adoption of the IEC 61000-4-29 standard, ensuring that equipment marketed in the European Union (EU) meets the same EMC requirements for DC power input port immunity. Compliance with this standard is a prerequisite for obtaining the CE marking, which is mandatory for products sold in the EU.
• GB/T 17626.29: This is the national standard of the People’s Republic of China, equivalent to IEC 61000-4-29. It is applicable to electrical and electronic equipment within China, specifying the test techniques and performance evaluation criteria for DC voltage dip and interruption immunity.
The LISUN CSS61000-29 DC Voltage Dips and Interruptions Generator is designed and manufactured strictly in accordance with these three standards. This ensures that the Voltage Dips and Interruptions Tester can be used globally, providing test results that are recognized by international and national regulatory authorities, as well as industry organizations. In addition, if there is a need to conduct AC voltage dip and interruption tests in compliance with standards such as IEC 61000-4-11 or GB/T 17626.11, LISUN Group also offers dedicated AC Voltage Dips and Interruptions Testers, which can be accessed through the link provided on the product page of the CSS61000-29.
The LISUN CSS61000-29 series Voltage Dips and Interruptions Testers includes four models: CSS61000-29A, CSS61000-29B, CSS61000-29C, and CSS61000-29D. Each model is designed to meet different capacity requirements of the Equipment Under Test (EUT), while sharing the same core functions and performance characteristics. The following table presents the detailed technical specifications of the LISUN CSS61000-29 series, including the capacity of the EUT, dip (interruption) time, dip (interruption) interval time, and the number of dips (interruptions).
| Technical Parameter | CSS61000-29A | CSS61000-29B | CSS61000-29C | CSS61000-29D |
|---|---|---|---|---|
| The capacity of the EUT (DC) | Max. 120V/5A | Max. 120V/10A | Max. 240V/5A | Max. 240V/10A |
| Dip (interruption) time | 1～60,000mS (all models) | 1～60,000mS (all models) | 1～60,000mS (all models) | 1～60,000mS (all models) |
| Dip (interruption) interval time | 1～9,999mS (all models) | 1～9,999mS (all models) | 1～9,999mS (all models) | 1～9,999mS (all models) |
| The number of dip (interruption) | 1～9,999 times (all models) | 1～9,999 times (all models) | 1～9,999 times (all models) | 1～9,999 times (all models) |
| Display and Control System | Large LCD touch screen with built-in Windows CE (all models) | Large LCD touch screen with built-in Windows CE (all models) | Large LCD touch screen with built-in Windows CE (all models) | Large LCD touch screen with built-in Windows CE (all models) |
| Compliance Standards | IEC61000-4-29/EN61000-4-29/GB/T17626.29 (all models) | IEC61000-4-29/EN61000-4-29/GB/T17626.29 (all models) | IEC61000-4-29/EN61000-4-29/GB/T17626.29 (all models) | IEC61000-4-29/EN61000-4-29/GB/T17626.29 (all models) |
The capacity of the EUT refers to the maximum DC voltage and current that the Voltage Dips and Interruptions Tester can supply to the EUT during the test. The LISUN CSS61000-29 series offers two voltage levels (120V and 240V) and two current levels (5A and 10A), providing flexibility to test a wide range of DC-powered equipment. For example, the CSS61000-29A model is suitable for testing small-scale equipment with a maximum DC input of 120V/5A, such as low-power industrial sensors and consumer electronics. The CSS61000-29D model, with a maximum capacity of 240V/10A, is ideal for testing high-power equipment like automotive DC-DC converters, solar charge controllers, and industrial motor drives. This range of capacities ensures that the Voltage Dips and Interruptions Tester can meet the testing needs of different industries and applications.
Dip (interruption) time is the duration for which the DC input voltage is reduced (dip) or completely interrupted. The LISUN CSS61000-29 series allows for a wide adjustment range of 1～60,000mS (1 millisecond to 60 seconds). This range covers the typical disturbance durations specified in the relevant standards. For instance, short interruptions in industrial power systems often last for a few milliseconds to a few seconds, while longer dips may occur due to power grid maintenance or fault recovery. The ability to adjust the dip (interruption) time with high precision (resolution of 1mS) ensures that the Voltage Dips and Interruptions Tester can simulate various real-world disturbance scenarios accurately. Test engineers can set the dip time according to the specific requirements of the standard or the expected operating environment of the EUT, ensuring that the test results reflect the actual immunity performance of the equipment.
The dip (interruption) interval time is the time between two consecutive dips or interruptions. The LISUN CSS61000-29 series provides an adjustment range of 1～9,999mS (1 millisecond to 9.999 seconds). This parameter is crucial for simulating multiple consecutive disturbances, which may occur in real-world power supply systems. For example, during a power grid fault, multiple voltage dips may occur in quick succession as the system attempts to recover. By adjusting the interval time, the Voltage Dips and Interruptions Tester can simulate such scenarios, evaluating the EUT’s ability to withstand repeated disturbances. The wide adjustment range and high precision of the interval time ensure that the tester can meet the diverse test requirements of different standards and applications.
The number of dips (interruptions) refers to the total number of disturbance events simulated during a single test. The LISUN CSS61000-29 series allows for setting 1～9,999 times, which is sufficient for most EMC testing requirements. In some cases, standards may require multiple dips to be applied to the EUT to evaluate its long-term stability and reliability. For example, the IEC 61000-4-29 standard may specify that a certain number of dips with specific parameters be applied to the EUT, and the equipment’s performance be monitored throughout the test. The ability to set a large number of dips ensures that the Voltage Dips and Interruptions Tester can conduct comprehensive tests, revealing potential weaknesses in the EUT’s immunity to repeated voltage disturbances.
The LISUN CSS61000-29 Voltage Dips and Interruptions Tester is equipped with a large LCD touch screen and a built-in Windows CE operating system. This user-friendly interface allows test engineers to easily set test parameters, monitor test progress, and view test results. The touch screen provides intuitive operation, with clear menus and icons that simplify the configuration of dip time, interval time, number of dips, and other parameters. The Windows CE system offers stable performance and supports data storage and export, enabling test engineers to save test data for later analysis and reporting. In addition, the display screen can real-time show the voltage waveform of the EUT’s input port during the test, allowing engineers to visually monitor the disturbance process and ensure the accuracy of the test.
To understand how the LISUN CSS61000-29 Voltage Dips and Interruptions Tester simulates voltage dips and interruptions, it is necessary to analyze its working principle. The tester consists of several key components, including a DC power supply module, a disturbance generation module, a control module, and a measurement module. The following is a detailed description of the working process:
The DC power supply module is responsible for providing a stable DC input voltage to the EUT under normal conditions. It can output a DC voltage within the range of 0～120V or 0～240V (depending on the model) and a maximum current of 5A or 10A. The power supply module uses high-precision voltage and current regulation circuits to ensure that the output voltage and current are stable and meet the requirements of the EUT. Before the test starts, the DC power supply module is set to the rated input voltage of the EUT, and the EUT is powered on to ensure it operates normally in the initial state.
The disturbance generation module is the core component of the Voltage Dips and Interruptions Tester, responsible for generating voltage dips and interruptions. It consists of a set of solid-state switches (such as MOSFETs or IGBTs) and a control circuit. When a voltage dip is required, the control circuit sends a signal to the solid-state switches, which partially shunt the current or adjust the voltage divider to reduce the output voltage of the DC power supply module to the desired dip level. The dip level can be set according to the standard requirements, such as 0% (interruption), 20%, 40%, 70%, or 80% of the rated voltage. For a short interruption, the solid-state switches are fully turned off, cutting off the power supply to the EUT for the set interruption time.
The disturbance generation module is designed to switch between normal voltage and dip/interruption voltage quickly and accurately. The switching time is typically in the order of microseconds, ensuring that the disturbance is generated instantaneously, simulating real-world sudden voltage changes. In addition, the module has a low output impedance, which minimizes the impact of the EUT’s load current on the dip/interruption voltage, ensuring that the disturbance parameters (such as dip time and voltage level) are stable and accurate.
The control module is responsible for coordinating the operation of the DC power supply module, disturbance generation module, and measurement module. It is composed of a microcontroller (MCU) or a digital signal processor (DSP) and the built-in Windows CE operating system. The control module receives test parameters (such as dip time, interval time, number of dips, and dip level) set by the user through the LCD touch screen. Based on these parameters, it generates control signals to trigger the disturbance generation module at the appropriate time, controlling the start and end of each dip or interruption.
During the test, the control module monitors the state of the tester and the EUT in real-time. If an abnormal condition occurs (such as overcurrent, overvoltage, or EUT shutdown), the control module can immediately stop the test and issue an alarm to protect the tester and the EUT from damage. In addition, the control module records the test data, including the start time, end time, dip parameters, and EUT’s operating status, and stores this data in the internal memory or exports it to an external storage device (such as a USB drive) for later analysis.
The measurement module is used to monitor and measure the voltage and current of the EUT’s input port during the test. It consists of high-precision voltage sensors and current sensors, as well as a data acquisition circuit. The voltage sensor measures the DC input voltage of the EUT in real-time, while the current sensor measures the input current. The data acquisition circuit converts the analog signals from the sensors into digital signals and sends them to the control module. The control module processes these data and displays the real-time voltage and current waveforms on the LCD touch screen.
The measurement module plays a crucial role in verifying the accuracy of the disturbance parameters. It ensures that the dip time, dip level, and interruption time generated by the disturbance generation module meet the set values. If there is a deviation between the measured parameters and the set parameters, the control module can adjust the disturbance generation module in real-time to correct the deviation. In addition, the measurement data can be used to evaluate the EUT’s immunity performance. For example, if the EUT continues to operate normally when a 40% voltage dip is applied for 100mS, it indicates that the EUT has good immunity to this level of disturbance. If the EUT malfunctions or shuts down, it indicates that the EUT’s immunity is insufficient, and improvements are needed in its power supply design.
DC Voltage Dips And Interruptions Generator_CSS61000 29
The LISUN CSS61000-29 Voltage Dips and Interruptions Tester is widely used in various industries that require EMC testing of DC-powered equipment. The following are the main application scenarios:
In industrial control systems, DC-powered equipment such as programmable logic controllers (PLCs), distributed control systems (DCS), and industrial sensors are widely used. These devices are often exposed to voltage dips and interruptions caused by load switching, motor starting, and power grid faults. A single voltage dip can lead to the failure of a control system, resulting in production line shutdowns and significant economic losses. The LISUN CSS61000-29 Voltage Dips and Interruptions Tester is used to test the immunity of these industrial control devices to voltage dips and interruptions. By simulating different disturbance scenarios, test engineers can evaluate whether the devices can maintain normal operation under abnormal power supply conditions, ensuring the reliability and stability of industrial production processes.
Modern automobiles are equipped with a large number of DC-powered electronic systems, such as engine control units (ECUs), anti-lock braking systems (ABS), infotainment systems, and battery management systems (BMS). The automotive power supply system is prone to voltage dips and interruptions due to factors such as cranking the engine, switching on high-power loads (such as air conditioners and headlights), and battery disconnection. These disturbances can affect the performance of automotive electronic systems, leading to issues such as engine misfires, ABS failure, or infotainment system crashes. The LISUN CSS61000-29 Voltage Dips and Interruptions Tester can simulate the voltage disturbances in automotive power supply systems, testing the immunity of automotive electronic components. This helps automotive manufacturers ensure that their products meet the EMC requirements of standards such as ISO 16750 (which references IEC 61000-4-29 for DC voltage dip testing), improving the safety and reliability of automobiles.
Renewable energy systems, such as solar photovoltaic (PV) systems and wind energy systems, rely on DC power for energy conversion and transmission. The DC input ports of solar inverters, PV charge controllers, and wind turbine converters are exposed to voltage dips and interruptions caused by weather conditions (such as cloud cover for solar systems) and grid faults. These disturbances can affect the efficiency of energy conversion and even damage the equipment. The LISUN CSS61000-29 Voltage Dips and Interruptions Tester is used to test the immunity of these renewable energy equipment to DC voltage disturbances. By simulating the voltage changes that occur in real-world renewable energy systems, test engineers can evaluate the equipment’s ability to withstand such disturbances, ensuring the stable operation of the renewable energy system and maximizing energy output.
Consumer electronics such as smartphones, tablets, laptops, and home appliances often use DC power supplies (such as AC-DC adapters). Although these devices are typically used in home environments where power supply is relatively stable, voltage dips and interruptions can still occur due to power grid fluctuations or home load switching. For example, a voltage dip when a refrigerator or air conditioner starts may cause a smartphone charger to stop working temporarily, affecting the charging process. The LISUN CSS61000-29 Voltage Dips and Interruptions Tester can test the immunity of consumer electronics and their power supplies to DC voltage dips and interruptions. This helps consumer electronics manufacturers improve the reliability of their products, enhancing user experience.
The LISUN CSS61000-29 Voltage Dips and Interruptions Tester stands out in the market due to its high reliability, accuracy, and user-friendliness. The following are its main advantages and high-reliability features:
As mentioned earlier, the LISUN CSS61000-29 Voltage Dips and Interruptions Tester is designed in accordance with IEC61000-4-29, EN61000-4-29, and GB/T17626.29 standards. This ensures that the test results obtained using this tester are recognized by global regulatory authorities and industry organizations. For manufacturers, using a standard-compliant Voltage Dips and Interruptions Tester is essential to ensure that their products meet the EMC requirements of different markets, avoiding barriers to trade and product recalls. LISUN Group conducts rigorous testing and calibration of each CSS61000-29 tester before leaving the factory, ensuring that its performance meets the standard specifications.
The accuracy and stability of disturbance parameters (such as dip time, dip level, and interval time) directly affect the validity of the test results. The LISUN CSS61000-29 tester uses high-precision components and advanced control algorithms to ensure that the disturbance parameters are highly accurate. For example, the dip time has a resolution of 1mS and an accuracy of ±0.1% of the set value, which is much higher than the requirements of the relevant standards. The disturbance generation module uses high-speed solid-state switches with low on-resistance and fast switching speed, ensuring that the voltage dip or interruption is generated instantaneously and the parameters remain stable during the disturbance period. In addition, the DC power supply module has low output ripple and noise, minimizing the impact of the power supply itself on the test results.
The LISUN CSS61000-29 Voltage Dips and Interruptions Tester is designed for long-term use in laboratory environments, with a robust structure and durable components. The case is made of high-quality metal materials, which provide good electromagnetic shielding and mechanical protection, preventing external electromagnetic interference from affecting the tester’s performance and protecting the internal components from damage. The internal circuits use industrial-grade components with a wide operating temperature range (-10℃～50℃), ensuring that the tester can operate stably in different laboratory conditions. In addition, the tester is equipped with multiple protection functions, such as overcurrent protection, overvoltage protection, overheating protection, and short-circuit protection. These protection functions can quickly respond to abnormal conditions, 切断 the power supply or adjust the circuit parameters to protect the tester and the EUT from damage.
The large LCD touch screen and Windows CE operating system of the LISUN CSS61000-29 tester make it easy to operate, even for engineers with limited experience in EMC testing. The interface provides clear prompts and help information, guiding users through the test parameter setting, test start, and data viewing processes. The tester supports the storage of multiple test programs, allowing users to save frequently used test parameters and call them directly in subsequent tests, improving test efficiency. In terms of data management, the tester can store a large amount of test data (including waveform data, parameter data, and EUT status data) in the internal memory or export it to an external storage device in formats such as CSV or Excel. This facilitates test engineers to analyze the data, generate test reports, and share test results with other team members or customers.
LISUN Group is a well-known manufacturer of EMC testing equipment, with a global sales and after-sales service network. For users of the LISUN CSS61000-29 Voltage Dips and Interruptions Tester, LISUN provides comprehensive after-sales service, including installation and commissioning, calibration, maintenance, and technical training. The company’s professional technical support team can quickly respond to user questions and provide solutions to technical problems, ensuring that the tester operates normally and the test work proceeds smoothly. In addition, LISUN regularly updates the firmware and software of the tester to add new functions and improve performance, ensuring that the Voltage Dips and Interruptions Tester remains compatible with the latest standards and meets the evolving testing needs of users.
7. Conclusion
In conclusion, Voltage Dips and Interruptions Testers play a crucial role in evaluating the immunity of DC-powered equipment to voltage dips and short interruptions. The LISUN CSS61000-29 DC Voltage Dips and Interruptions Generator, as a representative high-reliability product in this field, is designed strictly in accordance with international and national standards, providing accurate, stable, and repeatable test results. Its wide range of technical specifications, including different EUT capacities, adjustable dip (interruption) time, interval time, and number of dips, makes it suitable for testing various DC-powered equipment in industries such as industrial control, automotive electronics, renewable energy, and consumer electronics.
The working principle of the LISUN CSS61000-29 tester, which involves the coordination of the DC power supply module, disturbance generation module, control module, and measurement module, ensures that it can accurately simulate real-world voltage dip and interruption scenarios. The tester’s high-reliability features, such as strict standard compliance, high precision of disturbance parameters, robust design, user-friendly operation, and comprehensive after-sales service, make it a trusted choice for EMC test engineers worldwide.
As the demand for DC-powered equipment continues to grow and the requirements for EMC performance become more stringent, the role of Voltage Dips and Interruptions Testers will become increasingly important. The LISUN CSS61000-29 series, with its advanced technology and excellent performance, will continue to provide strong support for the development and testing of DC-powered equipment, helping manufacturers improve the reliability and safety of their products and meet the needs of global markets. For more information about the LISUN CSS61000-29 DC Voltage Dips and Interruptions Generator, please visit the official product page at https://www.lisungroup.com/products/emi-and-emc-test-system/dc-voltage-dips-and-interruptions-generator.html.
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