DC-CT® Current Transducers
The best AC⚡DC current sensor available today!
Electrical Power AnalysisHigh-precision electrical power measurement and analysis [AC⚡DC]
Dewesoft is a leading provider of advanced power analyzers and data acquisition systems designed to meet the rigorous demands of electrical power measurement and analysis. Our solutions are tailored for professionals across various industries, offering precise, reliable, and easy-to-use instruments to ensure optimal performance and efficiency in power systems.
Dewesoft Power Analyzers go beyond accurately measuring direct high-voltage and current signals. They excel in measuring a wide range of parameters, including vibration, temperature, loads, GPS/GNSS, CAN bus, XCP/CCP, video, and much more – all fully synchronized for comprehensive data insights.
highlights
Easy to use
Dewesoft power analyzers offer plug-and-play capabilities with the award-winning DewesoftX software. The hardware and sensors are automatically detected. Just select the input channels and power parameters you wish to calculate, and the power analyzer module will handle the rest.
Power calculations
The system calculates over 100 power parameters, including P, Q, S, PF, and cos phi. It also offers full raw data recording capabilities, as well as features like an oscilloscope, FFT, and harmonics analysis. These calculations can be performed both online and in post-processing.
Raw data storage
Dewesoft power analyzers always store raw data, giving you the flexibility to recalculate all parameters during post-processing. This ensures complete data integrity and allows for detailed analysis and validation after the measurement is complete.
Efficiency testing
Dewesoft motor and inverter efficiency analysis module optimizes electric input vs. mechanical output power using advanced techniques like Clarke and Park transformations. All motor analysis settings are consolidated in the Motor Analysis module, featuring setup options, transformations, and efficiency calculations.
GPU processing
Even at sample rates as high as 15 MS/s, the Power Analyzer software delivers real-time calculations by leveraging GPU multi-core graphics card processing.
15 MS/s sampling rate
Dewesoft power analyzer hardware includes high-speed amplifiers that offer sampling rates of up to 15 MS/s per channel. These amplifiers use SAR analog-to-digital converters with built-in hardware filtering capabilities.
5 MHz bandwidth
SIRUS® XHS power analyzers offer 5 MHz bandwidth acquisition and analysis with up to 15 MS/s sampling rate per channel.
Up to 64 channels
Our power analyzer can be configured with up to 64 channels in a single chassis solution. For applications with higher channel count requirements, multiple measurement instruments can be synchronized.
Fully isolated
The "worry-free" solution provides isolation on the sensor side (channel-to-ground), channel-to-channel, and even isolated sensor excitation. Experience less noise, no ground loops, and the best signal quality.
0,03 % accuracy
Our measurement signal amplifiers offer high accuracy for voltage and current measurement, with a basic power accuracy down to 0.03%.
Safety
Our high-voltage amplifiers offer direct input of ±2000 V, 1600 V, CAT II 1000 V, and CAT III 600 V with high galvanic channel-to-channel isolation.
Current sensors
We offer and support all types of current sensors, such as zero-flux current transducers, AC/DC current clamps, Rogowsky coils, and shunts. These sensors are true RMS sensors available in a variety of models and are powered directly by our power analyzers.
Additional inputs
Our power analyzer can also measure different signals such as IEPE, thermocouples, digital counters, speed, angle, GPS, CAN, XCP, FlexRay, video, etc. all fully synchronized.
Portable power analyzers
We also offer portable power analyzers with a built-in display, CPU, and batteries for standalone operation. These all-in-one solutions are perfect for field power analysis measurements.
Software included
Every Dewesoft data acquisition system is bundled with award-winning DewesoftX data acquisition software. The software is easy to use but very rich and deep in functionality. All software updates are free forever with no hidden licensing or yearly maintenance fees.
Dewesoft quality and 7-year warranty
Enjoy our industry-leading 7-year warranty. Our data acquisition systems are made in Europe, utilizing only the highest build quality standards. We offer free and customer-focused technical support. Your investment into the Dewesoft solutions is protected for years ahead.
Comprehensive power analysis solution
Dewesoft’s instrumentation is engineered to deliver accurate and comprehensive electrical power analysis. Whether you are working on energy generation, distribution, or consumption, our tools provide the insights needed to optimize power systems and enhance energy efficiency.
Key Features:
High Precision Measurement: Our devices offer high-resolution data acquisition with exceptional accuracy, ensuring reliable power measurement across a wide range of applications.
Real-time Data Processing: Experience real-time analysis with our powerful software, capable of instantaneously processing large volumes of data for immediate insights.
Multi-channel Support: Dewesoft power analyzers support multiple channels, allowing for simultaneous measurement of various electrical parameters, including voltage, current, power, frequency, and harmonics.
Multi-signal Support: Dewesoft power analyzers not only support direct high voltage and current inputs but can also acquire other analog signals such as vibration (IEPE, MEMS, charge), temperature (thermocouples and RTD), strain and stress, pressure, and LVDT, along with digital signals such as CAN, XCP, CCP, Flexray, GNSS, and video.
Advanced Harmonic Analysis: Identify and analyze harmonic distortions with our advanced tools, helping to improve power quality and reduce system losses.
Flexible and Scalable: Our modular systems can be customized and scaled to meet the specific needs of any project, from small-scale setups to large, complex installations.
What is electrical power analysis
Electrical power analysis is the process of examining and interpreting electrical parameters within power systems to ensure their efficiency, reliability, and safety. It involves measuring various electrical quantities such as voltage, current, power, frequency, and phase angles, and analyzing this data to understand the behavior and performance of electrical networks. By employing Dewesoft instrumentation and software, engineers can identify patterns, detect anomalies, and diagnose issues that may affect the operation of power systems. This analysis is crucial for optimizing energy generation, transmission, distribution, and consumption, enabling better decision-making and system management.
The scope of electrical power analysis extends to various applications, including renewable energy development, e-mobility development, power quality assessment, harmonic analysis, load profiling, fault detection, and electrical power systems analysis. Overall, electrical power analysis is a vital tool in maintaining the health and efficiency of any electrical devices and infrastructures, contributing to the sustainability and reliability of power systems.
Dewesoft power analyzer: more than just a power analyzer
Dewesoft power meters offer numerous benefits compared to conventional power analyzers. They provide a highly flexible solution for electrical and mechanical power measurements, combined with power quality analysis capabilities, making them the perfect choice for comprehensive power analysis.
Key Advantages:
Multi-Functional Device: Dewesodt power analyzers combine the functionality of a power analyzer, combustion analyzer, oscilloscope, raw data logger, spectrum analyzer, and CAN logger in a single device.
Synchronous Data Acquisition: Captures electrical, mechanical, vehicle bus, positioning data, and video simultaneously.
Unified Data Storage: Stores all data in one system and one data file format.
Integrated Power Analysis and Data Storage: Allows combined power analysis and raw data storage.
Real-Time Calculation: Performs live, online power calculations with 1ms resolution.
Enhanced Power Quality Analysis: Advanced tools for thorough power quality assessments are provided.
Versatile Input Channels: Supports any number and type of input channels, including voltage, current, IEPE/ICP, strain, thermocouple, RTD, and CAN.
Portable and Modular System: Our portable power analyzers are battery-powered and feature an integrated LED display, a fast CPU, and SSD storage, making them fully portable and standalone. Modular systems can easily be distributed and offer convenient setup for test benches and lab use. All power analyzers are expandable to hundreds of I/O channels.
Sensor Software Calibration: Includes additional software calibration for sensors.
Integrated Sensor Power Supply: We provide power for sensors such as current transducers directly from our power analyzers, eliminating the need for an external sensor excitation source.
These features make the Dewesoft powers analyzer a comprehensive and efficient power analysis solution, eliminating data synchronization, visualization, storage, and comparison issues.
Typical hardware configurations
Motor & Inverter Testing: 3-phase AC power (variable frequency) and mechanical power (with CNT inputs)
E-Mobility: 3-phase AC power (variable frequency), DC power
Aircraft: 3-phase AC power (400 Hz), 1-phase AC power (50 Hz), DC power
Marine: 3-phase AC power (50 Hz), 1-phase AC power (50 Hz), DC power
Railway: 3-phase AC power (50 Hz), 1-phase AC power (16.7 Hz), DC power
Browse all Dewesoft power analyzers and find the perfect one for your application.
High precision mesurements
For precise power analysis, highly accurate voltage and current amplifiers are essential. SIRIUS amplifiers, with their high sampling rates and integration into both high and low-voltage inputs, set new standards in measurement accuracy. These amplifiers boast a basic accuracy of 0.03% of reading from DC to 1 kHz. This level of precision is unique in the power analyzer market, particularly crucial for variable frequency drives where achieving the highest possible accuracy is necessary for all measurements.
Unlike other manufacturers, which often focus solely on accuracy at line frequencies (50/60 Hz), Dewesoft ensures superior performance across a broader frequency range. For a visual representation, refer to the grey line in the accompanying chart.
Key Features of High-Accuracy Amplifiers:
• Wide Bandwidth: Up to 5 MHz
• High Sampling Rate: 15 MS/s
• Base Accuracy: 0.03%
• Flexible Filtering Options: Includes optional hardware 1 MHz low-pass filter (LPF) and programmable digital IIR filters
These features make Dewesoft’s voltage and current amplifiers exceptionally accurate and versatile, ensuring top performance in various power analysis applications.
Frequency source selection
The Dewesoft Power Analyzer allows users to choose the frequency source for their measurements. The available options are:
Voltage
Current
External frequency source
This feature is especially beneficial when measuring inverters. Inverter measurements can be tricky due to the PWM-modulated voltage signal, which makes it difficult to determine the correct period of time. On the other hand, the current signal is generally less distorted because of the high inductance in the motor coil.
Therefore, using the current signal as the frequency source is often a better choice for inverter measurements. This approach ensures accurate frequency determination for every application.
Various wiring configurations with simple and intuitive setup
The DewesoftX data acquisition software offers a visual selection of different wiring schematics and provides power calculations for all possible connections.
Predefined Power Schematics:
Direct Current
Single-Phase
Two-Phase
Star Connection
Delta Connection
V Connection
Aron Connection
Combined Star/Delta Connection
These connections can be measured with or without currents. Thanks to the modular construction of our measurement devices and the multiple synchronized power modules in our software, Dewesoft can also analyze 6, 7, 9, or 12-phase motors.
To learn more about each connection, please look at the Dewesoft Power Analysis free online training or the Dewesoft Power Manual.
Electrical power calculations
DewesoftX data acquisition software automatically records raw voltage and current data while simultaneously calculating and storing all power parameters, including:
Active Power (P), Reactive Power (Q), Apparent Power (S), Distortion Power (D)
Cos φ, Power Factor
P, Q, Cos φ for each harmonic
Multiple power system calculations
Dewesoft power analyzers can measure multiple power systems simultaneously. For example, the Dewesoft R8D power analyzer can synchronously measure up to eight 3-phase systems. Dewesoft supports power analysis across various frequencies, including DC, 50 Hz, and variable frequencies, while accommodating all wiring configurations, such as single-phase, 2-phase, 3-phase star, 3-phase delta, 3-phase Aron, and 3-phase V, ensuring versatile and precise measurements for any application.
Mechanical parameters measurement
Dewesoft power analyzers can also measure mechanical values like torque, speed, noise, temperature, and vibration in complete synchronization. This allows you to perform also thermal, NVH and efficiency calculations in parallel to electrical power.
Accurate frequency calculation
A single Dewesoft power analyzer and data acquisition system can measure multiple power modules simultaneously, each with an independent frequency. Supported line frequencies include:
16.7 Hz: Railway Sector
25 Hz: Public Grid
50 Hz: Public Grid
60 Hz: Public Grid
400 and 800 Hz: Aerospace
Variable Frequency: E.g., power inverters
Period values calculation
Our power analyzers also calculate period values of voltage and current, power components, power factor, and symmetrical components. Users can define cycle calculations and the overlap percentage.
Star-delta connection calculation
The system can calculate all values and waveforms for star connections from a delta connection and vice versa, displaying waveforms for U1, U2, U3 ↔ U12, U23, U31.
Efficiency and loss mapping of AC motors and inverters
Electric motor and inverter efficiency analysis aims to enhance motor performance by optimizing the efficiency of the electric input power relative to the mechanical output power. This process can involve using Clarke and Park transformations, which provide a better understanding of the relationship between the input line phase, the induced magnetic field, and the mechanical rotation angle.
All relevant settings for this type of analysis are now consolidated under the new Motor Analysis tab within the Power module. This tab includes:
Motor analysis setup options
Transformations and efficiency calculations
Integration with multiple new stand-alone math modules
The Motor Analysis module utilizes various math modules and widgets, such as:
Resolver sensor
2D/3D mapping
Contour plot widget
For more detailed information, refer to the following resources:
Easy power quality analysis
DewesoftX Harmonic FFT software feature enables the visualization of harmonics in:
voltage,
current,
active and reactive power,
line voltage,
all fully synchronized to the fundamental frequency.
Power quality standards
Our power analyzer supports a wide range of power quality standards, including:
Voltage and Current Flicker
THD, THC, TDD, TDC, TDR
Interharmonics, Full and Half-Sidebands
Rapid Voltage Changes (RVC)
These measurements and analyses ensure compliance with multiple industry standards, making it easier to maintain optimal power quality.
Energy calculation
The Dewesoft Power module also automatically calculates the energy of the measured system. This feature enables the calculation of both positive and negative energy, providing a comprehensive understanding of the system's performance.
Additionally, the Math module allows users to calculate efficiency, essential for evaluating and optimizing system operations. This capability is particularly beneficial in various applications, such as:
Recuperation Brake Systems: Analyze the energy recovered during braking to improve system efficiency and performance.
Battery Testing: Measure energy input and output to assess battery efficiency, capacity, and overall health.
These features make Dewesoft Power Analyzers a versatile and powerful tool for energy calculation and efficiency analysis across different applications.
High-speed GPU-accelerated calculations with NVIDIA CUDA
Dewesoft utilizes NVIDIA graphics cards and NVIDIA CUDA cores to handle power calculations at high sample rates. By leveraging the GPU’s computing power, power analysis calculations are performed much faster than with the CPU alone. This enables sampling rates of up to 15 MS/s, with all calculations processed in near real-time, preventing computer overload.
Such processing power also allows you to simultaneously perform power calculations in multiple configurations and compare the results.
Rich visualization
After setting up the power module, you can configure and customize the measurement screen. The most relevant display widgets for electrical power analysis and power quality include the following display widgets:
Digital Meters: Display various instantaneous values calculated by the power module with unit support. Learn more.
Recorder and X/Y Recorder: The Dewesoft power analyzer provides visual recorder displays for time-domain data, showing all parameters in individual intervals. The X/Y recorder can generate orbital plots online. Learn more about Recorder and X/Y recorder.
Scope: Shows waveforms of voltages and currents, including line-to-line (U12, U23, U31) and line-to-earth (U1, U2, U3) voltages. Learn more.
Vector-Scope: Visualizes the relationships between voltages and currents for up to 3-phase systems. Multiple vectorscopes and individual harmonics can be displayed simultaneously. The "transparent" function allows for direct comparisons of phasors. Learn more.
Harmonic FFT: Offers a simple and comprehensive analysis of harmonics for voltage, current, power, and reactive power, all synchronized to the fundamental frequency of the signal. Learn more.
Contour plot: A 2D graphical representation that uses contours or color-coded regions to display 3D data. This visualization technique helps to reveal patterns and relationships in complex datasets, such as efficiency maps for motors, making it easier to understand and analyze the information. Learn more.
Fault and transient recorder
The Dewesoft power analyzer can also function as a fault and transient recorder. Measuring the shortest transients is easy with the high sampling rates provided. Our SIRIUS® XHS power analyzers excel in this area, especially with their 15 MS/s sampling speed amplifiers.
It has advanced triggering capabilities and can trigger on all channels, including analog, digital, power, and math. You can trigger various parameters such as:
Multiple parameters from the power module
U, I, P, Q, S, D, cos φ, power factor, etc.
Specific harmonic components
Positive, negative, and zero-sequence systems
Very fast glitch detection (up to 15 MS/s)
Mathematical channels like RPM, torque, efficiency, etc.
Channels streamed from third-party devices
Math formulas can create combined trigger conditions for any measurement parameter. When a trigger event occurs, data is stored at a fast sampling rate with pre- and post-event time. Only reduced datasets (min, max, average, RMS) are stored for the remainder of the measurement, minimizing file size for long-term measurements.
Applications:
Battery testing (discharge)
Inverter testing (high switching frequencies)
Motor testing
Compatible with various current sensors
Correct current transducers are essential for electrical measurements. Our power analyzers are compatible with a wide range of different current sensors. We are offering different current sensor types that match perfectly with our power analyzers:
DC-CT® current transducers
Zero-Flux transducers
Iron-core current transformers
Hall-compensated current clamps
Fluxgate current clamps
Rogowsky coil current probes
Shunts
All our current sensors feature TEDS and can be powered directly from our power analyzers. For more information refer to:
DC-CT® current transducer product page
Current sensors product page
Integrated sensor power supply
Current sensors can be powered directly from the signal amplifier. However, our higher accuracy sensors perform best when using our integrated SIRIUS® MCTS power supply unit. The MCTS power supply slice can be integrated in two ways:
As a rack slide-in slice for SIRIUS® R2DB, R3, R2/R4, R8, or R8DB power analyzers
As a stand-alone modular unit compatible with SIRIUS® modular and SIRIUS® XHS slices
This flexibility ensures that Dewesoft power analyzers can meet a wide range of measurements with precision and reliability.
Sensor calibration and accuracy
Voltage and current transducers always have a frequency-dependent amplitude error and phase shift. With Dewesoft’s X unique software calibration technology, amplitude and phase can be corrected for the entire frequency range from DC up to 1 MHz.
All internal curves, such as filter response, are corrected inside the software. The Dewesoft sensor database includes correction curves for a variety of transducers, including iron-core clamps, AC/DC clamps, Rogowski coils, and grid current and voltage transducers.
Raw Data Storage
Dewesoft power analyzers are designed to store raw data, capturing every detail of your measurements. This capability allows for post-processing recalculations and offline analysis, providing flexibility to revisit and reanalyze data as needed.
Storing raw data ensures that you can apply different calculations or corrections without repeating the measurement process, which is essential for complex analyses and long-term projects.
To manage storage demands, Dewesoft power analyzers feature datafile compression. This technology reduces file sizes significantly, making it easier to store large amounts of data without compromising quality.
In summary, Dewesoft power analyzers offer comprehensive raw data capture and advanced storage solutions, ensuring efficient data management and versatile post-processing capabilities for thorough and accurate power analysis.
Power Analysis Applications
With the increasing demand for energy efficiency more and more electrical equipment needs to be tested.
Dewesoft offers a very flexible power analyzer solution which can be used for almost all power analysis applications. Here are few under the scope:
Motor and Inverter testing
Power Transformer testing
Standby Power testing
Electrical and Lighting testing
You can also read the LED testing application note for more details on how the Dewesoft power analyzer is used for LED light power and efficiency testunbg.
Additional Resources
Additional information and resources on how to measure voltage and current, and perform electrical power analysis can be found in the following links:
Got Questions? We've Got Answers!
We've gathered all the answers you're looking for, neatly organized just for you.
Yes. The extensive Power Analyzer and Power Quality Analyzer manual available can be downloaded in a form of a PDF document.
In physics, power is the rate of doing work. It is equivalent to an amount of energy consumed per unit of time. The unit for power is Joule per second [J/s], also known as Watt [W]. The integral of power over time defines the energy (performed work). The power of an electrical system is calculated by multiplying the voltage with the current.
Measuring DC power is not as complicated, as the voltage and current are constant, so there is no frequency and the time interval for the integration just defines the average interval of the power calculation.
To measure AC systems the periodic time needs to be known. This cannot be done by taking the normal grid frequency (e.g. 50 Hz) as a constant, due to the fact that the grid frequency is ever changing depending on the balance of the energy supply and the electric load at that exact moment.
Conventional power analyzers use zero-point detection to determine the periodic time. This means that they evaluate when the voltage or current crosses that x-axis and use that value to calculate the periodic time. Dewesoft Power Analyzer on the other hand uses a special FFT algorithm (Software PPL) to determine the periodic time (frequency). The algorithm determines the periodic time of the signal via a special FFT algorithm using a sampling window of multiple periods. The calculated frequency is highly accurate (mHz) and works for every application (motor, inverter, grid, …).
Dewesoft calculates power in the frequency domain. With the predetermined period time, an FFT analysis for voltage and current is done for a definable number of periods (typically 10, with electrical applications) and a definable sampling rate. The FFT yields an amplitude for the voltage, current, and cos phi for each harmonic. One major benefit of this FFT transformation is that the behavior of amplifiers, current or voltage transducers in amplitude and phase for the whole frequency range (using the Sensor XML) can now be corrected.
Dewesoft Power Analyzer can measure DC, 1-phase, 2-phase, 3-phase, as well as 6 to 12-phase special measurements.
There are predefined measurement configurations for DC, Single phase, 2-phase, and various 3-phase configurations (Star, Delta, Aron, V-Connection, 3-phase 2-meter) already available in the Dewesoft X software, for higher phases single-phase measurements can be used, and using the mathematics module be added together for totals.
When measuring inverters always use high-speed amplifiers as the voltage is modulated with switching frequencies up to several hundred kHz, also ensure to use current sensors with high bandwidth capabilities as well as make sure they are capable to measure both DC and AC currents. Do not forget to set the current as of the frequency source and use either a star or delta connection. Never use an Aron or a V-connection for such measurements.
Dewesoft’s modular DAQ systems in combination with its powerful Dewesoft X software and Power Analyzer can measure all types of applications, also for E-Mobility the Dewesoft bundle is widely used. For example, a 6-phase motor can be measured by using 6 single-phase power modules and calculating the total power in the power module.
Dewesoft power analyzers support almost all types of current sensors, including:
- Dewesoft DC-CT current tranducer
- Shunts
- Iron-core clamps
- AC/DC current clamps
- Rogowsky coils
- Zero-flux transducers
- Voltage transducers
Yes. Some sensors can be powered directly from the signal amplifiers, while for higher-accuracy current sensors, we offer an integrated power supply module (SIRIUS MCTS2).
Due to the extensive and powerful calculations, recorded data files can become quite large. Fortunately, DewesoftX offers multiple storage options tailored to your specific application needs:
- Multi-File Storage
- Always Fast, Always Slow
- Fast on Trigger, Slow Otherwise
These options ensure efficient data management, helping you balance performance and storage requirements.
Yes. All Dewesoft Power Analyzers come included with the industry-leading 7-year warranty.
Yes. Dewesoft power analyzer includes advanced and easy-to-use power measurement and power analysis software. The software is included for free and offers lifetime free updates. An evaluation version is available for a test trial by requesting a 4-week evaluation license.
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