Core Technology and Working Principles

The superior performance of an Intelligent DC High-Voltage Generator is rooted in its sophisticated internal engineering. At its heart lies the PWM (Pulse Width Modulation) high-frequency width modulation technology. This system utilizes a high-frequency switching circuit and a voltage doubling unit, controlled by a closed-loop feedback mechanism. This "voltage major feedback" system continuously monitors and adjusts the output, resulting in exceptionally high voltage stability and a minimal ripple coefficient—often ≤1.0% or even lower in premium models :cite[1]:cite[6].

Furthermore, these generators are designed with strict adherence to electromagnetic compatibility (EMC) theory. Through special shielding, isolation, and grounding techniques, they effectively mitigate electromagnetic interference, guaranteeing both the accuracy of measurements and the protection of sensitive internal components. This robust design allows the generator to withstand rated voltage discharges without sustaining damage, ensuring long-term operational durability :cite[1]:cite[8].

Key Technical Specifications

The capabilities of an Intelligent DC High-Voltage Generator are defined by its key technical parameters, which often exceed the requirements outlined in industry standards like DL/T 848.1-2019 :cite[2].

• Output Voltage: Ranges from 60 kV to 400 kV, adaptable to various testing scenarios.

• Output Current: Typically from 1 mA to 10 mA, with higher capacity models available.

• Measurement Accuracy: High-precision digital readouts for voltage and current, with accuracy up to ±1.0% (full scale) :cite[3].

• Voltage Stability: Excellent line regulation, with changes ≤0.5% even with a ±10% fluctuation in input voltage :cite[1].

Compliance with Industry Standards

Reputable manufacturers ensure their Intelligent DC High-Voltage Generators conform to stringent national and international standards. In China, the industry standard DL/T 848.1-2019 specifies the technical requirements, test methods, and inspection rules for these devices, ensuring their quality and safety for production and use :cite[2]. Compliance with such standards is not merely a formality; it is a critical assurance of the product's performance, reliability, and safety in the field.

Advanced Features of Modern Generators

Today's intelligent generators are equipped with features that enhance usability, safety, and functionality.

• Integrated 0.75UDC-1mA Function: A single-touch button dedicated to testing zinc oxide surge arresters, automatically calculating and displaying the reference voltage, which streamlines a common but critical test procedure :cite[1]:cite[8].

• Comprehensive Protection Systems: Multiple, layered protection mechanisms including over-voltage, over-current, zero-position interlock, and a pioneering intelligent poor-grounding protection that prevents the equipment from operating if the ground connection is unsatisfactory :cite[8].

• User-Friendly Interfaces: Large LCD screens that clearly display output voltage, current, setting values, and timer information. Some models also feature USB interfaces and built-in printers for data recording and reporting :cite[1].

Critical Safety and Operational Guidelines

Operating high-voltage equipment demands strict adherence to safety protocols. Only personnel with a formal "High-Voltage Test Operation Certificate" should operate these generators :cite[1]:cite[3]. Key safety practices include:

• Ensuring a secure and proper earth ground connection before initiating any test.

• Implementing two clearly visible disconnect points in the power supply line as per power safety regulations.

• Using a dedicated discharge rod to safely discharge capacitive test objects (like long cables) before handling them. The discharge process should be gradual to avoid intense arcing :cite[3].

Conclusion

The Intelligent DC High-Voltage Generator represents a significant technological leap in high-voltage testing equipment. By integrating PWM high-frequency technology, advanced digital controls, and robust safety features, it provides unparalleled accuracy, stability, and operator safety. Compliance with standards like DL/T 848.1-2019 further solidifies its role as a trustworthy and essential tool for maintaining the health and safety of high-voltage electrical infrastructure. For any organization involved in power system maintenance and commissioning, investing in a modern intelligent generator is a strategic decision for ensuring operational excellence and reliability.