The integration and testing of power electronic systems require measurement tools capable of handling complex signals across multiple channels simultaneously. The K333 (3-Phase Power Analysis) option dedicated to the Rohde & Schwarz MXO 3, MXO 4, MXO 5, and MXO 5C series oscilloscopes transforms the instrument into a powerful network analyzer, specifically designed for developers of inverters, electric vehicle (EV) chargers, uninterruptible power supplies (UPS), and industrial power converters.
Features and Benefits of 3-Phase Analysis
Support for Multiple Wiring Configurations
The software architecture is designed to adapt to different types of electrical systems. The system supports measurements in both Star (Wye) and Delta configurations, implementing the most common calculation methods: 2V2A (3-phase 3-wire system with the 2-wattmeter method), 3V3A (3-phase 3-wire system with the 3-wattmeter method), and 3VN3A (3-phase 4-wire system for single-phase measurements).
Power Quality and Phasor Diagrams
The K333 option allows you to measure critical Power Quality parameters to evaluate energy conversion efficiency. The instrument calculates and displays RMS values (Voltage and Current), Active (P) , Reactive (Q), and Apparent Power (S), as well as Power Factor and Crest Factor.
The integrated Phasor Diagram display provides an immediate graphical representation of the angular relationships (phase shift) between voltage and current vectors, which is essential for balancing loads in complex 3-phase systems.
Harmonics Analysis (IEC 61000-3-2)
Controlling harmonic distortions is vital for pre-compliance certifications. The software analyzes harmonic currents, verifying compliance with the IEC 61000-3-2 standard at the individual equipment level.
The system displays real-time results through a clear bar graph (Bargraph), which can be set to a linear or exponential (logarithmic) scale. It allows analysis up to the 40th harmonic, automatically returning a Pass/Fail result accompanied by limit values and measured margins for each harmonic order.
Simplified Setup and Intuitive Interface
Configuring power measurements has never been so fast. The integration of the option directly into the "Apps" menu of the MXO oscilloscopes ensures a smooth user experience. Through the touch panel, you can easily assign the voltage and current hardware channels to their respective phases.
The user can quickly define the fundamental frequency (e.g., 50/60 Hz or automatic) and isolate a stable waveform cycle by specifying a cut-off frequency to filter out unwanted noise, thereby optimizing calculation accuracy.
Choose the Ideal Platform for Your Analysis
The K333 3-phase analysis option is available via software license for the entire range of R&S MXO Series oscilloscopes. Here is how to choose the perfect instrument based on your operational needs:
| Family |
Option Description |
Usage Profile and Benefits |
| R&S MXO 3 |
MXO3-K333 3-PHASE POWER ANALYSIS |
Entry-level 3-phase solution. Offers the lowest 8-channel cost. Ideal for education and basic power quality validation, where budget sensitivity is high. |
| R&S MXO 4 |
MXO4-K333 3-PHASE POWER ANALYSIS |
The most balanced choice in terms of performance, flexibility, and cost. Applicable to most standard scenarios (limited to a maximum of 4 channels). |
| R&S MXO 5 |
MXO5-K333 3-PHASE POWER ANALYSIS |
Ideal for complex, dynamic systems. It boasts fast processing and deep acquisition memory to handle a high event density and provide advanced analysis with full configuration control. |
| R&S MXO 5C |
MXO5C-K333 3-PHASE POWER ANALYSIS |
Compact model (without a front display) designed as a true workstation for long-duration measurements. Ideal for remote control and automation needs, as well as for integration into automated rack test systems. |
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