ZGF Series DC High Voltage Generator: Technical Overview and ApplicationInsights​

The ZGF Series represents a new generation of portable DC high voltage generators, engineered in compliance with the Chinese electric power industry standard DL/T848.1-2004. Designed primarily for field and laboratory use in sectors such as power utilities, mining, metallurgy, and steel production, this series provides reliable high-voltage DC for testing critical equipment including zinc oxide lightning arresters, power cables, transformers, and generators.

Core Technology and Design Features

At the heart of the ZGF series is a high-frequency voltage-multiplying circuit utilizing advanced PWM (Pulse Width Modulation) technology and high-power IGBT devices. This design, combined with closed-loop voltage feedback, ensures exceptional voltage stability and a low ripple coefficient (≤3%). The output voltage can be smoothly adjusted from zero via a potentiometer, with high regulation accuracy (≤1%) and stability (≤1%).

A key feature for electrical testing is the dedicated 75% UDC 1mA single-touch button, which simplifies and standardizes the test procedure for zinc oxide arresters, ensuring accuracy within ≤2.0%. Overvoltage protection is user-configurable via a dial-setting mechanism with an error margin of ±2%.

The construction emphasizes durability and safety. The high-voltage cylinder is fabricated from epoxy fiberglass, providing excellent electrical insulation and mechanical strength in an air-insulated design that eliminates oil leakage concerns. The control unit is housed in a portable, robust aluminum alloy carrying case, making the system suitable for mobile test teams.

Technical Specifications and Performance

The series offers a range of models to suit various power requirements, as detailed in the technical indicators table. Key performance parameters across all models include:

1.Measurement Accuracy: Both voltage and current are displayed on a digital meter with an accuracy of ±(1.5% of reading ± 2 digits).

2.Voltage Stability: Output remains stable (fluctuation ≤1%) despite input power variations of ±10%.

3.Overload Capacity: Capable of operating at 110% of rated voltage under no-load for 10 minutes and can handle charging currents up to 125% of the rated current.

4.Duty Cycle: Designed for intermittent operation, with a maximum continuous working time of 10 minutes per cycle.

5.Power Supply: Operates from a standard single-phase AC 220V ±10%, 50Hz source.

Operating Environment and Compliance

The generator is designed for operation in ambient temperatures from 0 to 40°C, at relative humidity not exceeding 85% at 25°C (non-condensing), and at altitudes below 1500 meters. Its compliance with the DL/T848.1-2004 standard and successful passage of quality inspection tests underscore its reliability and suitability for professional high-voltage DC testing applications.

Conclusion

The ZGF Series DC High Voltage Generator integrates modern power electronics, precise digital measurement, and a rugged, user-oriented design. Its combination of high stability, portability, and specialized testing functions makes it a versatile and essential tool for technicians performing maintenance and diagnostic tests on high-voltage electrical infrastructure.

GDZX is a manufacturer of power detection equipment, offering a diverse range of products with comprehensive models and providing professional technical support. Contact us at +86-27-6552607 or +86-17396104357.Website: http://en.gdzxdl.com/