Description

Detailed Parameter Table

Parameter Name	Parameter Value
Product Model	VI451-10
Manufacturer	Yokogawa Electric Corporation
Product Category	Voltage/Current Input Module
Input Channels	2 Independent Channels (Voltage/Current)
Voltage Range	15 mV to 1000 V (CAT III 1000V Safety)
Current Range	10 mA to 5 A (Direct), 50 kA (with CTs)
Basic Accuracy	±0.03% rdg. ±0.02% f.s. (45-66 Hz)
Bandwidth	DC to 5 MHz (±3 dB)
Sampling Rate	10 MS/s (16-bit Simultaneous Sampling)
Common Mode Rejection	120 dB (DC to 60 Hz)
Communication Interface	EtherCAT®, Modbus TCP, GP-IB (via WT5000)
Operating Temperature	0°C to +45°C (32°F to 113°F)
Safety Standards	IEC 61010-1 CAT III 1000 V
Certifications	CE, UKCA, cULus, ISO 17025 Calibration Traceable

Product Introduction

The YOKOGAWA VI451-10 is an ultra-precision voltage/current input module designed for Yokogawa’s flagship WT5000 Precision Power Analyzer series. Engineered for metrology-grade measurements in R&D and validation labs, this dual-channel module delivers ±0.03% accuracy across unprecedented bandwidth (DC to 5 MHz), enabling characterization of next-generation wide-bandgap power devices. The YOKOGAWA VI451-10 supports direct voltage inputs up to 1000 V and current inputs to 5 A, while offering seamless integration with external current transformers (CTs) and Rogowski coils for mega-ampere applications.

As the sensory backbone of Yokogawa’s power analysis ecosystem, the YOKOGAWA VI451-10 captures high-fidelity waveforms in fast-switching SiC/GaN circuits, multi-level inverters, and high-frequency resonant converters. Its proprietary digital signal processing eliminates range-switching delays and phase errors, providing simultaneous RMS, power, and harmonic data with 0.01 Hz resolution. The module’s integration with Yokogawa’s WTViewer Plus® software enables automated compliance testing per IEC 61000-4-30 Class A and JIS C 1102 standards, making it indispensable for power electronics development and energy efficiency certification.

YOKOGAWA VI451-10

Core Advantages and Technical Highlights

The YOKOGAWA VI451-10 redefines measurement integrity through cutting-edge innovations:

Metrology-Grade Accuracy: Leveraging Yokogawa’s patented Direct Synthesis Architecture (DSA), the module achieves ±0.03% basic accuracy – the industry’s highest for wide-bandwidth measurements. Dual 24-bit ΔΣ ADCs with auto-calibration eliminate temperature drift (±15 ppm/°C), critical for automotive environmental chamber testing.

Ultra-Wide Bandwidth: With 5 MHz analog bandwidth and 10 MS/s sampling, the YOKOGAWA VI451-10 resolves sub-200 ns transients in 650 V SiC MOSFETs. Anti-aliasing filters maintain signal integrity up to the Nyquist frequency, capturing EMI noise spectra in wireless power transfer systems.

High Noise Immunity: 120 dB common-mode rejection (CMRR) isolates measurement signals in floating topologies like bridgeless PFC circuits. Guarded inputs and twisted-pair terminal design suppress ground loops in multi-inverter test benches.

Flexible Sensor Integration: Supports direct connection of current shunts (1 mΩ to 10 Ω), Rogowski coils (50 mV/A to 10 V/A), and CTs (0.1 V/A to 10 V/A) without external conditioners. Automatic scaling and phase compensation simplify setup.

Synchronization Capability: EtherCAT enables ±50 ns inter-module synchronization for multi-channel systems, essential for multi-phase motor drives and matrix converters.

Typical Application Scenarios

The YOKOGAWA VI451-10 enables breakthrough insights in advanced power systems:

EV Traction Inverter Validation: Characterizes switching losses in 800 V SiC inverters during regenerative braking. The 5 MHz bandwidth captures reverse recovery currents <500 ns.

GaN Data Center PSUs: Measures efficiency >98% at 1 MHz switching frequencies. Common-mode rejection isolates noise in totem-pole PFC stages.

Wireless Charging Systems: Analyzes resonant tank waveforms (85-205 kHz) with harmonic distortion <0.1%. Verifies Qi v2.0 compliance.

Aerospace 270 VDC Systems: Validates MIL-STD-704G transient responses. The 1000 V CAT III rating withstands 200 ms 300% overvoltage surges.

Magnetic Confinement Fusion: Integrates with Rogowski coils measuring plasma current pulses >100 kA at 10 MS/s sampling.

Related Model Recommendations

YOKOGAWA WT5000 Mainframe: Mandatory host for VI451-10 operation (supports 7-slot configuration).

YOKOGAWA 701930 Rogowski Coil: 100 MHz bandwidth sensor for high-current measurements.

YOKOGAWA 700929 High-Voltage Probe: 2000 V CAT II divider for >1000 V applications.

YOKOGAWA PW3337-01: 3-phase power module for combined use with VI451-10 inputs.

YOKOGAWA GP-10 GPS Unit: Achieves μs-level synchronization across multiple analyzers.

YOKOGAWA WTViewer Plus®: Advanced software for automated VI451-10 test sequences.

YOKOGAWA VI451-10

Installation, Commissioning and Maintenance Instructions

Installation Preparation:
Mount the YOKOGAWA VI451-10 in WT5000 slots 1-7. Maintain ≥50 mm clearance between modules. Use shielded twisted-pair cables (Yokogawa 700929) with guard terminals connected. For >5 A measurements, employ external shunts with 4-terminal Kelvin connections.

Commissioning:

Perform zero-adjustment via WT5000 self-calibration routine.

Configure sensor types/ranges in WTViewer Plus® (e.g., “Rogowski 10 V/kA”).

Enable harmonic analysis with 0.01 Hz resolution.

Verify accuracy using Yokogawa 2558A reference calibrator (±0.002%).

Maintenance Protocol:

Annual ISO 17025 calibration required for metrology compliance.

Quarterly zero-point calibration using internal function.

Monitor module temperature via Modbus register %MW215.

Replace cooling fans every 15,000 operating hours.

Store calibration coefficients in non-volatile memory before firmware updates.