The Yokogawa WT3000 is a precision power analyzer engineered for high-accuracy AC and DC power measurement across complex electrical systems. With basic power accuracy of 0.02% of reading and measurement bandwidth spanning DC to 1 MHz, the instrument supports up to four configurable input elements for simultaneous analysis of three-phase inverters, power supplies, motor drives, and power conversion devices. Its architecture enables detailed efficiency characterization and waveform analysis critical to power electronics development and validation.
Technical Specifications
Measurement Performance
• Power accuracy: 0.02% of reading
• Bandwidth: DC and 0.1 Hz to 1 MHz
• Voltage ranges: 15 V to 1000 V (eight selectable ranges)
• Current ranges: 5 mA to 2 A (low current element); 0.5 A to 30 A (high current element)
• Crest factor measurement: Up to 300
• Effective input range: 1% to 130% of measurement range
• Common-mode voltage: Up to 1000 V
• Data storage interval: 50 ms minimum
Input Configuration
• Input elements: 1 to 4 per unit
• Simultaneous measurement: Up to 2 units (8 total power input elements)
– Key Features
Harmonic & Power Quality Analysis
• Harmonic measurement to 50 orders (IEC61000-3-2, IEC61000-3-12 compliant)
• Voltage fluctuation and flicker measurement (EN61000-3-3, IEC61000-3-11 compliant)
• Cycle-by-cycle voltage, current, and power analysis
• FFT and waveform computation
Motor & Efficiency Evaluation
• Motor and inverter performance assessment with torque meter integration
• Calculations: Motor output, synchronous speed, slip, motor input/output efficiency, inverter efficiency
• User-defined efficiency formulas (up to four)
• Active, apparent, and reactive power integration (WP, WS, WQ)
• Wiring loss and two-wattmeter method compensation
Display & Connectivity
• 8.4-inch TFT LCD with range indicator LEDs
• GP-IB standard interface
• Optional: RS-232, Ethernet (100BASE-TX/10BASE-T), USB (dual ports), VGA, PC Card Slot (ATA flash)
– Typical Applications
Power supply testing, inverter characterization, motor drive validation, efficiency analysis, harmonic compliance verification, power conversion device development.
– Compatibility & Integration
Standard GP-IB connectivity with optional serial, Ethernet, and USB interfaces for PC integration and data logging via ATA flash card storage.
