Yokogawa WT3002E Precision Power Analyzer

The Yokogawa WT3002E is a dual-channel precision power analyzer delivering ±0.04% basic power accuracy across DC and 0.1 Hz to 1 MHz measurement bandwidth. Built for high-speed power characterization in motor drives, solar inverters, uninterruptible power supplies, and aircraft power systems, the instrument combines flexible input architecture with advanced harmonic and waveform analysis. Dual input element slots accommodate both 2 A and 30 A elements in a single unit, supporting direct voltage measurement to 600 V and current measurement to 20 A.

The analyzer executes 50 ms minimum data storage intervals with real-time update rates to 50 ms, enabling transient capture and dynamic load profiling. Harmonic measurement operates simultaneously with power data in normal mode and extends to fundamental frequencies from 0.1 Hz to 2.6 kHz in wide bandwidth mode, supporting IEC61000-3-2, IEC61000-3-12, IEC61000-3-3, and IEC61000-3-11 compliance verification. FFT analysis, waveform computation, and waveform sampling data preservation enable detailed spectral and temporal investigation.

The optional motor evaluation function (/MTR) quantifies efficiency and torque-speed characteristics. High-speed automatic ranging in integration mode simplifies multi-range measurement workflows. Common mode voltage immunity reaches 1000 Vrms continuous at 50/60 Hz, with effective input range spanning 1% to 130% of selected scale.

Technical Specifications

• Basic Power Accuracy: ±0.04% of reading


• Measurement Bandwidth: DC and 0.1 Hz to 1 MHz


• Input Elements: 2 A and 30 A (both installable in single unit)


• Direct Voltage Input: Up to 600 V


• Direct Current Input: Up to 20 A


• Data Storage Interval: Minimum 50 ms


• Data Update Rate: Up to 50 ms maximum speed


• Effective Input Range: 1% to 130%


• Common Mode Voltage: 1000 Vrms continuous (50/60 Hz)


• Display: High-resolution LCD


• Power Supply: 100 to 240 VAC


• Operating Temperature: +5 to +40°C


• Operating Humidity: 20 to 80% RH (without printer), 35 to 80% RH (with printer), non-condensing


• Operating Altitude: 2000 m or less

Key Features

• Harmonic measurements: IEC61000-3-2 and IEC61000-3-12 compliant


• Voltage fluctuation and flicker measurements: IEC61000-3-3 and IEC61000-3-11 compliant


• Simultaneous harmonic and power data acquisition


• Wide bandwidth harmonic measurement to 2.6 kHz fundamental frequency


• FFT analysis and waveform computation


• Waveform sampling data storage


• Motor efficiency and torque-speed evaluation (optional /MTR)


• High-speed automatic ranging in integration mode

Typical Applications

• Motor drive characterization and efficiency testing


• Solar inverter power quality and harmonic analysis


• Uninterruptible power supply validation


• Aircraft power system qualification

Compatibility & Integration Standard interfaces include GP-IB, Ethernet, RS-232, and USB for PC connection. Optional interfaces support VGA output (/V1), additional USB ports (/C5, /C12), serial communications (/C2), Ethernet (/C7), and D/A output (/DA). WTViewerE application software enables remote control, monitoring, and multi-unit connectivity (up to 4 analyzers simultaneously).