Revolutionizing Field Testing: The ZXXL-Y Transmission Line Parameter Analyzer

Accurately measuring the positive sequence impedance, zero sequence impedance, capacitance, and other critical parameters of high-voltage transmission lines (overhead, cable, or hybrid) under live grid conditions has long been a significant challenge for power system technicians. Traditional methods involve cumbersome setups with multiple heavy devices (often requiring truck transport), complex wiring prone to errors and safety hazards, significant vulnerability to induced voltages from adjacent energized lines, and reliance on often inconvenient 380V power sources. The ZXXL-Y Transmission Line Parameter Test Instrument addresses these pain points with a groundbreaking, integrated approach.

Core Innovation: Advanced Anti-Interference Technology
The ZXXL-Y's defining strength lies in its robust immunity to electromagnetic interference (EMI), a critical factor in live-grid environments or areas with high induced voltages. Its core strategy employs a built-in variable-frequency power source (outputting at 45Hz or 55Hz) combined with sophisticated digital filtering. This intelligent design strategically shifts the measurement frequency away from the dominant 50/60Hz power frequency and its harmonics, effectively nullifying the most pervasive sources of field interference. This allows for precise measurements even under extreme conditions, boasting tolerance to induced voltages up to 30kV and induced currents reaching 60A.

Key Advantages Over Traditional Methods:

1.Unparalleled Portability & Integration: Unlike traditional setups requiring numerous separate devices (effectively "a truckload of equipment"), the ZXXL-Y integrates all functionality into a single, portable unit (550x430x530 mm, 67 kg). This drastically simplifies logistics, setup time, and field deployment.

2.Simplified Power Requirements: Eliminating the need for hard-to-access 380V power sources, the ZXXL-Y operates solely on standard 220V AC mains or readily available generators (≥3kW).

3.Direct Assessment & Safety: The instrument uniquely directly measures prevailing on-site induced voltage and current levels before testing. This capability allows technicians to definitively assess if conditions are safe and suitable for accurate measurement, enhancing situational awareness and safety.

4.Streamlined Operation & Enhanced Safety: Traditional methods require complex and hazardous manual reconfiguration of test leads between different parameter measurements (e.g., switching from positive sequence impedance to zero sequence capacitance). The ZXXL-Y requires only a single connection to the line's down lead. Subsequent tests for all key parameters (Z1, Z0, C1, C0) are performed automatically via the instrument's software, minimizing exposure to dangerous induced voltages during lead changes.

5.Embedded Safety Protocols: An integrated ground connection monitor actively verifies proper grounding before allowing tests to commence, providing an essential layer of protection for personnel and equipment.

6.User-Centric Design: Featuring a large full-touch LCD interface with clear Chinese/English menus, the instrument requires minimal specialized training. Measurement processes are intuitive and guided.

7.Data Management: Equipped with calendar functions and substantial internal storage (200 test groups), the ZXXL-Y allows chronological result logging. Data can be exported via USB for detailed analysis, report generation, and archival on any PC.

Technical Specifications Summary:

1.Measurement Principle: Frequency Conversion (45Hz/55Hz)

2.Power Input: AC 220V ±10% or Generator (≥3kW)

3.Source Output: Max 300V AC, 8A; Accuracy: 0.5% (V, I)

4.Measurement Ranges & Accuracy:

Capacitance (C): 0.01µF – 30µF (±1% rdg ±0.01µF for ≥1µF; ±2% rdg ±0.01µF for <1µF)

Impedance (|Z|): 0.01Ω – 400Ω (±1% rdg ±0.01Ω for ≥1Ω; ±2% rdg ±0.01Ω for <1Ω)

Impedance Angle (θ): -180° – +180° (±0.2° for V>1.0V; ±0.3° for V=0.2V-1.0V)

5.Resolution: 0.0001µF (C), 0.0001Ω (|Z|), 0.0001° (θ)

6.Immunity: 30kV Induced Voltage, 60A Induced Current

7.Processing: High-Speed Digital Signal Processor (DSP)

8.Environmental: -20°C to 50°C, RH <80%

9.Dimensions & Weight: 550 x 430 x 530 mm (LxWxH), 67 kg

Conclusion:
     The ZXXL-Y represents a paradigm shift in on-site transmission line parameter testing. By integrating sophisticated variable-frequency anti-interference technology, critical safety features (ground monitoring, high immunity), extreme portability, and user-friendly operation into a single robust unit, it overcomes the major limitations of traditional methodologies. It delivers high-precision measurements under challenging field conditions (strong EMI, high induced voltages) with significantly enhanced safety and operational efficiency, making it an indispensable tool for modern power system commissioning, maintenance, and diagnostics teams. Its ability to operate reliably using only 220V power further extends its utility to diverse field scenarios.

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/