Technical Analysis and Application of ZXSBF Series Inductive Withstand Voltage Test Systems in High-Voltage Power Equipment Evaluation

    The ZXSBF Series Inductive Withstand Voltage Test System is a specialized apparatus designed to address the critical requirements of insulation strength assessment for high-voltage electrical equipment in power systems. Compliant with the Chinese national standard GB311-61 and the Preventive Test Regulations for Electrical Equipment (issued by the former Ministry of Water Resources and Electric Power in 1985), this system serves as a robust solution for frequency-multiplied induction voltage testing. Its primary applications include evaluating the insulation integrity of series-excited voltage transformers (35–220 kV), motor windings, and small-scale transformers, while also functioning as a short-term 150 Hz power supply.

Design Philosophy and Standards Compliance
Developed to meet the stringent demands of modern power grid maintenance, the ZXSBF system ensures alignment with China’s foundational electrical safety standards. By leveraging triple-frequency (150 Hz) excitation, it simulates operational and fault-induced overvoltage conditions, enabling comprehensive verification of both primary and secondary insulation systems in voltage transformers (VTs). This design philosophy directly supports utilities in preventing insulation failures—a key factor in grid reliability.

Key Performance Features

1.Operational Simplicity and Reliability
The system integrates user-centric controls with fail-safe protection mechanisms, minimizing setup complexity while ensuring repeatable test accuracy. Its solid-state design enhances durability in field or lab environments.

2.Precision Waveform Generation
With a waveform distortion rate of ≤5%, the ZXSBF delivers a near-sinusoidal output, critical for avoiding false diagnostic results caused by harmonic interference.

3.Adaptive Configuration
Customizable output voltage ranges (0–300 V, 0–500 V, 0–1000 V) and scalable input capacity (up to 375 kVA) allow tailored setups for diverse equipment classes.

 Applications in Power System Maintenance

1.Voltage Transformer Testing
The ZXSBF performs induction withstand voltage tests on 35–220 kV VTs, validating inter-turn, layer, and main insulation resilience under high-frequency stress.

2.Motor and Transformer Winding Assessment
Facilitates localized insulation defect detection in rotating machines and distribution transformers by applying elevated frequencies to induce controlled dielectric stress.

3.Emergency Power Source
Serves as a temporary 150 Hz supply for specialized industrial or research scenarios requiring non-standard frequencies.

Advantages Over Conventional Methods

1.Time Efficiency: By operating at 150 Hz, the system reduces test duration while achieving equivalent voltage stress to 50 Hz tests, per IEC 60076-3 equivalence principles.

2.Safety: Isolated output design mitigates risks of transient overvoltages damaging sensitive equipment.

3.Portability: Modular architecture supports deployment across substations, repair workshops, and manufacturing facilities.

Operational Guidelines

1.Pre-Test Calibration: Verify waveform purity and voltage scaling using reference instruments.

2.Thermal Management: Adhere to strict load duration limits (40–60 s) to prevent overheating in high-capacity tests.

3.Safety Protocols: Implement grounding and interlocks per IEEE 510-1983 recommendations for high-voltage testing environments.

    The ZXSBF Series Inductive Withstand Voltage Test System bridges the gap between regulatory compliance and practical field testing needs. Its precision, adaptability, and adherence to legacy and modern standards make it indispensable for utilities and OEMs focused on extending equipment service life and preventing grid outages. For technicians, mastery of this system’s capabilities ensures accurate diagnostics and alignment with global best practices in high-voltage insulation testing.

   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/