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ZXHQ-C vs. ZXHQ-Y Transformer Calibrators: A Technical Comparison
Introduction
Transformer calibrators are essential tools for ensuring the accuracy and reliability of instrument transformers in power systems. The ZXHQ-C Transformer Calibrator represents a significant advancement in automated testing technology, offering high precision, user-friendly operation, and robust performance. This article provides a technical overview of the ZXHQ-C and compares it with the ZXHQ-Y Transformer Field Calibrator, highlighting key differences and applications for technicians and engineers.
Key Features of ZXHQ-C Transformer Calibrator
The ZXHQ-C is designed for laboratory and field use, combining electronic error signal decomposition with digital display capabilities. Its standout features include:
A 320×240 LCD with backlighting for clear visibility in various lighting conditions.
Full English interface and large-font display of ratio error, phase error, and orthogonal error.
Compliance with JJG314-1993 and JJG314-1994 standards, supporting automatic sampling and polarity error detection.
DSP technology for stable performance, eliminating instability from resistance-capacitance phase-shift circuits.
Support for S-class transformer testing and automatic range switching.
Technical Specifications
Environment: Operates at 5°C–40°C, <80% humidity, and altitudes up to 2500m.
Measurement Range:
In-phase component: 0.0001%–200.0% (resolution: 0.0001%).
Orthogonal component: 0.001′–700.0′ (resolution: 0.001′).
Impedance and admittance measurements with high resolution.
Basic Error:
In-phase: ±(x×2% + y×2%) ± Dx (Dx = 2).
Orthogonal: ±(x×2% + y×2% × 34.48) (Dy = 5).
Work Range:
Current: (1%–149%) In for 5A, (5%–149%) In for 1A.
Voltage: (5%–149%) Un for 100V/150V/100V/√3.
Power Consumption: <15 VA (without printer), <25 VA (with printer).
Dimensions: 260×350×150 mm; weight: 6 kg.
Comparison with ZXHQ-Y Transformer Field Calibrator
While the ZXHQ-C is optimized for both lab and field use, the ZXHQ-Y is specifically designed for field applications. Key differences include:
Portability: The ZXHQ-Y is typically more compact and lightweight, emphasizing ease of transport and operation in harsh field environments.
Power Supply: The ZXHQ-Y may feature enhanced battery options or low-power modes for extended field use, whereas the ZXHQ-C relies on AC power (220V ± 5V).
Environmental Robustness: The ZXHQ-Y often has higher ingress protection (IP) ratings for dust and moisture resistance, suited for outdoor conditions.
Functionality: The ZXHQ-C includes advanced features like harmonic suppression (>40 dB) and virtual instrument support, while the ZXHQ-Y focuses on core functionalities like ratio and phase error measurement with simplified operation.
Applications
ZXHQ-C: Ideal for calibration labs, manufacturing units, and field tests requiring high precision and comprehensive data analysis.
ZXHQ-Y: Best for on-site maintenance and commissioning of transformers where portability and durability are critical.
Conclusion
The ZXHQ-C Transformer Calibrator offers unparalleled accuracy and advanced features for modern transformer testing. Compared to the field-focused ZXHQ-Y, it provides greater functionality and precision, making it suitable for both laboratory and field technicians. Understanding these differences helps professionals select the right tool for their specific needs, ensuring efficient and reliable transformer calibration.
