The ZXHQ-B+ Variable Frequency Transformer Comprehensive Testing Instrument is a next-generation solution engineered for precision testing of current transformers (CTs) and voltage transformers (PTs) in power systems. Developed through extensive market research and theoretical innovation, this device integrates high-performance DSP and ARM processors with advanced manufacturing techniques to deliver unmatched reliability, automation, and testing efficiency. Designed to meet the rigorous demands of modern power grids, it stands as a benchmark for transformer testing in the electrical industry.
1.Key Technical Features
Multi-Functional Testing Capabilities
Supports comprehensive evaluation of CTs (protection, metering, and TP classes) and protection-class PTs.
Core tests include:
Excitation characteristics (voltage-current curve).
Ratio, polarity, and secondary winding resistance.
Secondary burden, ratio error, and phase error.
Protection PT electromagnetic unit analysis.
2.Intelligent Parameter Calculation
Automatically computes critical parameters:
Knee-point voltage/current, 5%/10% error curves.
Accuracy limit factor (ALF), instrument security factor (FS).
Secondary time constant (Ts), remanence factor (Kr), saturated/unsaturated inductance.
Compliance with IEC 60044-1/6, GB20840.1-3, and adaptive standard selection based on transformer type.
3.High-Voltage Testing via Low-Frequency Methodology
Employs low-frequency injection technology to resolve excitation characteristics for CTs with knee-point voltages up to 45 kV, ensuring safety and accuracy.
4.User-Centric Design
Graphical interface: Intuitive Chinese/English display with real-time data visualization.
One-click automation: Unified wiring for CT resistance, excitation, ratio, and polarity tests.
Data management: Stores 2,000 test datasets; USB export enables PC-based analysis and automated Word report generation.
5.Portability and Robustness
Compact dimensions (340 × 180 × 330 mm) and lightweight design (<9 kg).
Operates at -10°C to 50°C and ≤90% humidity, suitable for field and lab environments.
Technical Specifications
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Parameter
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Specification
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Output Range
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0–180 Vrms, 12 Arms (36A peak)
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CT Ratio Testing
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1:1–40,000; ±0.2% accuracy
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PT Ratio Testing
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1:1–40,000; ±0.2% accuracy
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Phase Measurement
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±5 min; 0.5 min resolution
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Winding Resistance
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0–300 Ω; ±2% ±2 mΩ
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Secondary Burden
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0–300 VA; ±2% ±0.2 VA
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Power Supply
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AC 220 V ±10%, 50 Hz
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Applications
1.Protection CT/PT Validation: Ensures relay coordination accuracy by verifying ALF, FS, and excitation saturation.
2.Metering CT Calibration: Validates ratio error and phase displacement for revenue-grade precision.
3.Diagnostic Testing: Identifies core saturation, remanence effects, and winding degradation.
4.Laboratory & Field Use: Portable design supports both controlled lab environments and on-site substation testing.
The ZXHQ-B+ redefines transformer testing through its fusion of automation, precision, and adaptability. By addressing the limitations of traditional methods—such as manual calculations, fragmented tools, and high-voltage risks—it empowers utilities to enhance grid reliability while reducing downtime. Its compliance with IEC/GB standards and advanced data processing capabilities make it indispensable for technicians, engineers, and testing laboratories seeking to optimize transformer performance in evolving power networks.
GDZX is a manufacturer of power testing equipment, offering a wide range of product categories with comprehensive models and providing professional technical support. Contact: +86-17396104357.Website: https://www.highvoltage-testequipment.com/
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