0.1Hz VLF High Voltage Generator for AC Withstand Testing HZG1701

HZG1701 0.1Hz VLF High Voltage Generator

Product Introduction

The HZG1701 Ultra Low Frequency High Voltage Generator is a professional 0.1Hz VLF AC withstand test equipment designed for insulation testing of power cables, motors, generators and other high voltage electrical equipment.

The equipment adopts advanced digital frequency conversion technology, ARM microcontroller control technology and high-speed data acquisition technology. It integrates automatic voltage boosting, voltage measurement, current measurement, protection and test data management functions.

Compared with traditional 50Hz AC withstand test systems, the 0.1Hz ultra low frequency technology greatly reduces the required power capacity, equipment size and weight. It provides a more portable and efficient solution for high voltage insulation testing in field environments.

The HZG1701 series complies with the requirements of DL/T849.4-2004 and is widely used in power systems, substations, power plants and electrical maintenance projects.

Application Scenarios

Power Cable Withstand Testing

The HZG1701 is widely used for insulation withstand testing of:

• Medium and low voltage power cables
• Underground cables
• XLPE insulated cables
• Cable commissioning and acceptance testing

Generator and Motor Insulation Testing

Suitable for:

• Generator winding insulation testing
• Motor winding withstand testing
• Electrical equipment preventive maintenance

Substation and Power System Maintenance

Common applications include:

• Substation equipment inspection
• Power transmission and distribution maintenance
• Electrical installation testing

Field High Voltage Testing

Designed for:

• Outdoor testing operations
• Mobile testing projects
• Regular insulation diagnosis

Technical Parameters

Why Ultra Low Frequency Withstand Testing Is Needed

High voltage electrical equipment requires insulation withstand testing to identify insulation defects and ensure safe operation.

Traditional 50Hz AC withstand testing requires large-capacity transformers because equipment such as power cables and motors usually has high capacitance. This results in large equipment size, high transportation costs and difficult field operation.

The 0.1Hz VLF AC withstand testing method reduces the required testing power while maintaining effective AC insulation testing performance.

It provides advantages including:

• Lower power requirement
• Smaller equipment size
• Easier transportation
• Better field operation efficiency

Test Principle

The VLF high voltage generator applies a low-frequency AC high voltage signal to the tested equipment.

By reducing the frequency from traditional 50Hz AC to 0.1Hz, the capacitive current requirement is significantly reduced.

During the test process, the system monitors:

• Output voltage
• Leakage current
• Waveform condition
• Insulation abnormal discharge

The test results are used to evaluate the insulation condition of electrical equipment.

Equipment Components

Operation Procedure

1. Equipment Connection

Connect the control unit, high voltage generator and tested equipment according to the wiring requirements.

2. Parameter Setting

Set:

• Output frequency
• Test voltage
• Test time
• Overvoltage protection value
• Overcurrent protection value

3. Automatic Testing

After pressing start, the system automatically performs:

• Self-check
• Voltage boosting
• Constant voltage output
• Test timing
• Automatic shutdown
• Automatic discharge

4. Data Management

After testing:

• Test results are automatically saved
• Test reports can be printed
• Historical records can be reviewed

Product Features & Advantages

Advanced 0.1Hz VLF Technology

Uses ultra low frequency AC withstand testing technology to provide reliable insulation assessment.

Portable Design

Compared with traditional AC withstand test equipment:

• Smaller size
• Lower weight
• Easier transportation

Automatic Test Process

Integrates:

• Automatic boosting
• Automatic measurement
• Automatic protection
• Automatic data storage

Multiple Protection Functions

Includes:

• Overvoltage protection
• Overcurrent protection
• Automatic shutdown
• Automatic discharge

Easy Operation

Features:

• 7-inch touch screen
• Digital control system
• User-friendly interface

Complete Test Management

Supports:

• Data storage
• Report printing
• USB communication

Safety Considerations

• Only trained professional personnel should operate the equipment.
• Follow high voltage safety regulations during testing.
• Confirm correct grounding before operation.
• Maintain a safe distance during high voltage output.
• Fully discharge the tested equipment before removing cables.
• Do not open or repair the equipment without authorization.

Warranty & After-sales Service

• Each HZG1701 unit is manufactured under strict quality control and factory inspection procedures.
• The product provides a 1-year warranty period.
• Manufacturing-related quality problems during the warranty period will be repaired free of charge.
• Lifetime technical support and maintenance guidance are provided.
• Software upgrade services and operation training are available.
• Professional technical support is provided for installation, operation and troubleshooting.

FAQ

What is a 0.1Hz VLF high voltage generator used for?

A VLF high voltage generator is mainly used for AC withstand testing and insulation diagnosis of power cables, motors, generators and other high voltage electrical equipment.

Why use 0.1Hz VLF testing?

The 0.1Hz testing method reduces the required test power compared with traditional 50Hz AC testing, making the equipment smaller, lighter and more suitable for field applications.

What voltage models are available for HZG1701?

The HZG1701 series supports 30kV, 40kV, 50kV, 60kV, 80kV and 90kV peak output voltage models.

Can this equipment be used outdoors?

Yes. The HZG1701 supports both indoor and outdoor high voltage testing environments.

Does the system have automatic protection?

Yes. It includes overvoltage protection, overcurrent protection and automatic shutdown functions.

Can test reports be generated?

Yes. Test data can be automatically stored and printed as test reports.

Conclusion

The HZG1701 0.1Hz VLF High Voltage Generator provides a reliable and efficient solution for AC withstand testing and insulation diagnosis.

With advanced digital control technology, portable design, automatic testing functions and comprehensive protection systems, it is widely used in power cable testing, substation maintenance and high voltage electrical equipment inspection.