ZGS Intelligent DC HV Generator: Power Equipment Testing

The ZGS Intelligent DC High Voltage Generator is a advanced testing instrument specifically engineered for DC high voltage withstand and diagnostic tests on a wide range of electrical power apparatus. These include zinc oxide surge arresters (MOA), power cables, power transformers, generators, and various types of circuit breakers. Its design integrates microprocessor-based control with high-voltage engineering to deliver precision, stability, and operational safety for field and laboratory applications.

Core Functional Features

From a technical standpoint, the ZGS series distinguishes itself through a combination of automated processes and robust data management capabilities:

1.Automated MOA (Metal Oxide Arrester) Testing: The unit features a dedicated fully automatic test mode for arresters. With a one-touch operation, it automatically measures the 0.75 UDC and 1mA leakage current reference, achieving a high accuracy of ≤1.0%. This ensures excellent repeatability and reliable assessment of arrester degradation.

2.Programmable Voltage Control: The system allows for precise presetting of test voltages. During operation, it automatically steps up the voltage to the set value and maintains it constant, compensating for fluctuations in the power supply or load. The voltage stability is specified at ≤1% for a ±10% variation in mains voltage.

3.Automated Timing and Step-Down: For standardized withstand tests, the user can preset a test duration. The generator automatically initiates timing upon reaching the target voltage and smoothly reduces the output upon completion, preventing over-stress on the equipment under test (EUT).

4.Microprocessor-Controlled Protection: Over-voltage protection is managed digitally by the microprocessor, offering high precision and reliability. The system incorporates specialized shielding, isolation, and grounding safeguards to protect both the generator and the operator, even during a rated voltage discharge from the EUT.

5.Data Management and Interface: The unit supports real-time data capture and automatic storage of test parameters. Furthermore, software support enables connection to a computer for remote operation, data analysis, and report generation, facilitating integration into modern digital asset management systems.

High-Precision Measurement and Electrical Characteristics

The technical indicators of the ZGS series highlight its measurement integrity and load-handling capability:

1.Measurement Accuracy: Voltage measurement accuracy is rated at ±(1.0% of reading ± 0.2kV), while current measurement accuracy is ±(1.0% of reading ± 2µA). This level of precision is critical for trend analysis and comparative testing.

2.Output Purity and Stability: The output voltage features a low ripple factor of ≤0.5%, ensuring that the applied stress is predominantly DC and does not introduce AC components that could skew test results on capacitive loads.

3.Overload and Capacitive Load Capacity: The system is designed to handle significant transient stresses. It can withstand no-load voltages exceeding 10% of the rated voltage. Importantly, it is capable of charging loads with 1.5 times the rated current for up to ten minutes, demonstrating a strong ability to test large capacitive loads (such as long power cables) without limitation on the capacitance value of the tested product.

Mechanical and Environmental Design

Engineered for field use, the generator employs an epoxy FRP (Fiber-Reinforced Plastic) electrically insulating double-pressure cylinder with air insulation, eliminating risks of oil leakage. The operating chassis is designed for both vertical and horizontal use, enhancing on-site maneuverability. The operational environment is specified for temperatures ranging from -10°C to 40°C and relative humidity up to 85% at 25°C (non-condensing), with an altitude limit of 1500 meters. The unit operates in an intermittent duty cycle, with a maximum continuous operation time of 30 minutes.

Model Variants

The series offers a range of models to suit different testing requirements, defined by their rated voltage (kV) and rated current (mA), and consequently, their output power.

In summary, the ZGS Intelligent DC High Voltage Generator represents a sophisticated tool for power system technicians and engineers. Its blend of automated testing routines, high measurement accuracy, and robust physical design makes it a suitable choice for preventive maintenance and commissioning tests on high-voltage equipment.

 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/