Yokogawa WT3000 Precision Power Analyzer (760303-03-SV-D/G6) — 3-Element, 30A

The Yokogawa WT3000 is a benchtop power analyzer designed for high-accuracy R&D and calibration work on power electronics, inverters, and multi-phase systems. This specific unit (Model 760303) comes equipped with three 30 A direct-input power elements, delivering a basic power accuracy of ±(0.01% of reading + 0.03% of range) across a frequency range from DC and 0.1 Hz up to 1 MHz.

Configured with factory-installed options for external VGA monitor output (/SV) and 500th-order harmonic measurement (/G6), this 3-channel instrument is well-suited for evaluating 3-phase 3-wire (3P3W) and 3-phase 4-wire (3P4W) equipment, solar inverters, electric vehicle drive systems, and variable-frequency drives (VFDs).

Technical Overview & Core Features

High-Precision Measurement Engine

The Yokogawa WT3000 uses 16-bit A/D converters with a 200 kS/s sampling rate on each channel. Combined with internal noise shielding and high common-mode rejection ratios (CMRR), the instrument maintains low measurement uncertainty even in noisy high-voltage switching environments. It measures voltage, current, active power, reactive power, apparent power, power factor, and phase angle simultaneously across all three elements.

3-Element Input Configuration (Model 760303)

This configuration houses three direct current input elements capable of handling up to 30 A RMS direct current and 1000 V RMS direct voltage per channel. Having three independent elements allows test engineers to evaluate:

• 3-phase power lines (3P3W, 3P4W, 3V3A configurations).

• Single-phase AC input alongside 2-phase DC or AC outputs for converter efficiency testing.

• Individual phase imbalances and load characteristics simultaneously.

Advanced Harmonic Analysis (/G6 Option)

Modern power conversion systems operating with high switching frequencies generate significant high-order harmonic noise. The /G6 option extends the WT3000’s digital signal processing capabilities to analyze harmonic components up to the 500th order for 50/60 Hz fundamental frequencies. It calculates total harmonic distortion (THD), phase angles, and individual harmonic power levels in real time alongside standard numeric data updates.

External Video Output (/SV Option)

The /SV option adds a standard 15-pin D-sub VGA output port to the rear panel. This allows the instrument display to be mirrored on a larger external laboratory monitor or integrated into automated test stands where remote screen visibility is required.

Real-World Applications

• EV Inverter & Motor Drive Testing: Evaluate 3-phase AC outputs and inverter efficiency under varying dynamic loads.

• Solar (PV) Inverter Performance: Calculate DC-to-AC conversion efficiency and monitor high-order grid harmonics for interconnection compliance.

• Standby Power Measurement (IEC 62301): High measurement sensitivity at low current ranges allows precise evaluation of standby power consumption in consumer and industrial electronics.

• Transformer & Reactor Loss Measurements: Accurately measure low power-factor loads and high-frequency core losses with minimal phase error.

Technical Comparison: Yokogawa WT3000 vs. Alternative Benchtop Analyzers

When choosing a benchtop power analyzer for precision laboratory work, engineers typically compare the Yokogawa WT3000 against instruments like the Fluke Norma 5000 and Keysight PA2201A.

Practical Comparison Insights:

1. Measurement Accuracy: The Yokogawa WT3000 offers tighter basic power accuracy (0.01%) compared to the Fluke Norma 5000 (0.03%) and Keysight PA2201A (0.05%). For loss calculations where small fractions of a percent matter (e.g., high-efficiency motor or inverter testing), lower baseline uncertainty is critical.

2. Harmonic Resolution: The /G6 option enables harmonic evaluation up to the 500th order, whereas the Norma 5000 tops out at the 80th order and the PA2201A at the 50th order. This makes the WT3000 better suited for identifying high-frequency switching interference in SiC and GaN power designs.

3. Thermal Stability: yokogawa wt3000 price internal shunt design and thermal management minimize drift during long-duration thermal run tests, ensuring consistent readings over hours of continuous data logging.

Specifications

• Model Code: 760303-03-SV-D/G6

• Input Elements: 3x Direct Current Elements (30 A max)

• Voltage Ranges: 15 V, 30 V, 60 V, 100 V, 150 V, 300 V, 600 V, 1000 V RMS

• Current Ranges (Direct): 0.5 A, 1 A, 2 A, 5 A, 10 A, 20 A, 30 A RMS

• Basic Power Accuracy: ±(0.01% of reading + 0.03% of range) at 50/60 Hz

• Bandwidth: DC, 0.1 Hz to 1 MHz

• Sampling Rate: 200 kS/s (16-bit resolution)

• Crest Factor: 3 or 6

• Harmonic Option (/G6): Simultaneous harmonic measurement up to 500th order (50/60 Hz fundamental)

• Video Output (/SV): External VGA 15-pin D-sub port

• Power Cord (-D): UL/CSA standard 120 V power cord

• Display: 8.4-inch color TFT LCD (800 x 600)

• Interfaces: GP-IB, USB (Type B), RS-232, Ethernet

What’s in the Box

• 1x Yokogawa WT3000 Precision Power Analyzer (760303-03-SV-D/G6)

• 1x AC Power Cable

• Terminal Safety Covers / Caps

• User Reference Manual