ZXSBF Third-Harmonic Generator for Induced Over-Voltage Testing

The ZXSBF Third-harmonic Generator is a specialized test set engineered to fulfill frequency-multiplied induced over-voltage withstand test requirements, particularly for series-excited High Potential Transformers within 35–220 kV voltage systems. It serves as a reliable power source for evaluating the dielectric strength of transformer insulation, performing induced voltage tests on minor transformer windings, or supplying short-duration 150 Hz power.

Key Applications

1.Induced over-voltage withstand testing on high-voltage series-excited transformers

2.Insulation dielectric strength assessment

3.Induced voltage tests on auxiliary or small transformer windings

4.Short-term 150 Hz AC power supply for related test applications

Technical Features

1.Ease of Operation & Reliability: Designed for user-friendly control and stable performance under test conditions, ensuring consistent and repeatable results.

2.Induced Over-Voltage Test Compliance: Specifically suited for test protocols requiring voltage frequency multiplication, simulating operational stresses on insulation.

Main Technical Specifications

1.Input: Three-phase 380 V, 50 Hz sine wave

2.Output Voltage Ranges: 0–300 V / 0–500 V / 0–1000 V, 150 Hz

3.Output Waveform Distortion: ≤ 5%

4.Rated Capacity: Up to 375 kVA

5.Continuous No-Load Operation: ≤ 5 minutes

6.Continuous Load Operation: 40–60 seconds

Operational Notes
The generator is intended for intermittent use under controlled conditions. The limited load operation time ensures safe temperature rise and prevents insulation overheating during high-output tests. The 150 Hz output, triple the fundamental frequency, effectively induces higher voltage levels across test objects without exceeding the system’s voltage rating, thereby meeting international standards for transformer insulation testing.

This test set provides a practical and efficient solution for high-voltage laboratories and commissioning teams, supporting rigorous insulation validation while maintaining operational safety and performance consistency.

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/