ZXBXZ Resonant Test System for Cables: A Technical Overview

The ZXBXZ AC Resonant Test System is a specialized solution designed for withstand voltage testing and partial discharge detection on power cables. Utilizing a frequency-tuned series resonance principle, it applies high AC voltage while drawing significantly less input power compared to traditional test transformers, making it efficient, lightweight, and highly suitable for field applications.

System Composition
The system is modularly built from four core components:

1.Frequency & Voltage Modulated Power Source: Generates a variable frequency, variable voltage output to excite the system and sweep for the resonant point.

2.Exciting Transformer: Steps up the input voltage from the power source to a level suitable for driving the reactive circuit.

3.Reactor (Inductor): The primary reactive component. Multiple dry-type, epoxy-cast reactors are used in series or parallel combinations to achieve the required inductance and voltage rating for different cable lengths and voltage classes.

4.Capacitive Divider: Measures the high test voltage applied to the cable with high accuracy.

Key Features & Advantages

1.Flexible Test Modes: Offers three operational modes—auto resonance point search, auto resonance search with auto voltage boost, and manual testing—providing adaptability for various testing procedures.

2.Portability: Designed to be compact, lightweight, and portable, addressing the challenges of on-site cable testing.

3.Robust Reactor Design: Reactors feature dry-type epoxy casting, ensuring excellent insulation, mechanical strength, reliability, and maintenance-free operation.

4.Wide Input Compatibility: Can be powered by standard 220V or 380V AC supplies (±15%), with a frequency tolerance of 50Hz ±5%.

Technical Specifications

1.Output Voltage: 0 – 220kV (configurable for higher voltages per model).

2.Output Frequency Range: 30 – 300 Hz.

3.Output Waveform: Pure sine wave with low distortion (Total Harmonic Distortion ≤ 1%).

4.Frequency Adjustment: Fine resolution of 0.1Hz with high stability (≤ 0.05%).

5.Duty Cycle: Capable of continuous operation at full load for 60 minutes.

6.System Quality Factor (Q): Typically between 30 and 90, ensuring high efficiency.

System Configuration & Application Guide
The ZXBXZ system is offered in standardized models tailored for specific cable voltage classes and lengths. The configuration primarily varies in the number and rating of reactors, the power of the source and excitation transformer, and the divider rating.

For Cables ≤ 35 kV (Typical Models):

For Cables ≥ 110 kV (Typical Models):

Conclusion
The ZXBXZ Resonant Test System provides a reliable, efficient, and user-friendly solution for AC withstand testing of cables across a wide range of voltages and lengths. Its modular design, combined with precise frequency control and high-quality output, meets the rigorous demands of modern cable commissioning and maintenance for technical personnel.

 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/