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Advanced Single-Phase AC Standard Source: ZX1030A Technical Analysis
Introduction
The ZX1030A Single-Phase AC Standard Source is a high-precision instrument designed for calibrating and testing single-phase watt-hour meters up to class 1.0 and below. Its integration of a standard meter and power source, combined with advanced digital technologies, makes it a standout solution for metrology laboratories and power utilities. This article provides a technical overview of the ZX1030A, highlighting its key features, performance metrics, and comparative advantages.
Key Features and Technologies
Integrated Structure: The ZX1030A combines a digital multifunction standard meter and a power source, allowing direct electrical parameter readouts via software. This integration simplifies calibration workflows and reduces external dependencies.
Signal Generation Technology: Utilizing Direct Digital Synthesis (DDS), Complex Programmable Logic Devices (CPLD), and RAM-embedded systems, the instrument ensures high stability, fine resolution (0.01%), and low distortion (≤0.5%) in output signals.
Efficient Power Amplification: The PWM digital power amplifier operates at over 90% efficiency with a 300 kHz carrier frequency, minimizing distortion, heat generation, and power consumption.
High-Precision Timing: An built-in OCXO (Oven-Controlled Crystal Oscillator) provides a 50 kHz precision impulse output for calibrating energy meter clocks and testing time-based errors (e.g., day error/hour segment error).
Comprehensive Protection: Features include voltage short-circuit alarm, open-circuit detection, and overload protection, ensuring device and operator safety.
Technical Performance
Accuracy: The instrument and its built-in meter both achieve 0.1% accuracy, meeting stringent calibration requirements.
Voltage Output: 0–280 V, adjustable in 0.01% steps, with three independent terminals (each ≤15 VA).
Current Output: Multiple ranges (0.025A–100A), continuously adjustable from 0–120% with 0.01% fineness. Minimum output current is 5 mA at ≤0.5% accuracy.
Power Output: Voltage circuit ≤100 VA; current circuit ≤180 VA.
Stability: Output stability ≤0.05% over 120 seconds at PF=1.
Frequency and Phase: Frequency range 45–65 Hz (0.1 Hz resolution); phase adjustment from -180.0° to 180.0° (0.1° resolution).
Indication Accuracy: Voltmeter/ammeter ±0.2%; phase meter ±0.3°; frequency meter ±0.1 Hz.
Comparative Advantages
Compared to traditional calibration sources, the ZX1030A offers:
Higher Integration: Eliminates the need for external standard meters, reducing setup complexity and cost.
Superior Efficiency: PWM amplification ensures >90% efficiency versus typical 60–70% in analog amplifiers.
Enhanced Precision: OCXO-based timing and DDS signal generation provide better accuracy and stability.
Advanced Communication: Optional RS485 interface enables communication testing with smart meters.
Applications
The ZX1030A is ideal for:
Calibration of single-phase energy meters.
Testing meter communication protocols (with optional software).
Research and development in power metrology.
Conclusion
The ZX1030A sets a new benchmark for single-phase AC standard sources with its high accuracy, integrated design, and advanced technologies. Its combination of performance, efficiency, and user-friendly features makes it an invaluable tool for technicians and engineers in the power industry.
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/
