WT1500 Precision Power Analyzer
Achieving a decarbonized society requires greater energy efficiency, wider adoption of renewable energy, and continued innovation in electrification technologies. Accurate power measurement is essential to validate performance and efficiency improvements.
Leveraging YOKOGAWA’s long-standing expertise in precision measurement, the WT1500 Precision Power Analyzer delivers the accuracy, flexibility, and system integration capabilities needed for advanced power evaluation, helping engineers accelerate development toward a sustainable future.
High performance
Class-leading ±0.038% total power accuracy, direct 2000 V measurement, and 2 MHz bandwidth provide highly accurate evaluation of next-generation power conversion systems.
Integrable
A compact 2U JIS/EIA rackmount chassis supports four power and four motor channels per unit with native CAN/CAN FD, UDP, IEEE 1588, and web-based remote control for seamless integration into test racks.
Scalable
Multi-unit synchronization expands a single system to 20 power channels and 20 motor channels, while flexible encoder and resolver inputs simplify multi-motor testing and automated production measurement.
Reference-class accuracy at DC and 50/60 Hz
The WT1500 delivers class-leading ±0.038% total power accuracy for both DC and 50/60 Hz measurements. It maintains excellent accuracy even at low power factors, enabling precise efficiency evaluation in applications such as no-load inverter testing. Accuracy is guaranteed over a wide operating temperature range of 23°C ±5°C, providing greater installation flexibility. Combined with Yokogawa current sensors, the WT1500 forms a complete high-accuracy power measurement solution.
✓: Available, ✓✓: Power supply for current sensor is available, —: Not available
| *1: | This is the power accuracy of the power analyzer itself. When using a current sensor, the sensor’s accuracy is added. |
| *2: | When using the direct current input on the WT310EH, the accuracy is ±0.5%. |
Flexible input configuration with selectable 2000 V high‑voltage or 2 MS/s wideband elements
Selectable High Voltage (HV) and Wide Bandwidth (WB) input elements allow the WT1500 to be configured for a wide range of applications. The HV element supports direct measurements up to 2000 V, while the WB element delivers up to 2 MHz bandwidth for high-speed power electronics measurements. Both element types can be mixed within the same instrument for maximum flexibility.
* When measuring high voltages above 1000 V, use the 758932 (high voltage safety terminal adapter) and appropriate cables for high voltages.
20 power and 20 motor channels via multi-unit synchronization
The WT1500 supports up to four power channels and four motor channels per unit, with multi-unit synchronization enabling seamless expansion to 20 power channels and 20 motor channels. The main unit centrally configures, controls, and acquires data from all connected instruments, simplifying large-scale automated test systems.
Power/Motor Measurement Channels
The main unit and sub-units are connected using optical fiber cables and optical transceiver modules.
| * | Motor measurement requires one of the following options: /EM1, /RM1, /EM2, /RM2, or /EM1RM1. See below for details. |
| * | Multi-unit synchronization requires the /SY1 option. The /SY1 option will be available soon. It can be added to a purchased unit using an upcoming option upgrade license. |
Flexible Multi-Motor Analysis with Encoder & Resolver Support
The WT1500 supports flexible motor analysis using both encoder and resolver inputs. Freely mix encoder and resolver channels to evaluate multiple motor types, while built-in Ld/Lq calculations provide advanced analysis for high-efficiency permanent magnet synchronous motors (PMSMs).
Vector diagram of a PMSM
Resolver Input Function for Motor Speed Measurement
2U chassis sized for the ATE rack
The WT1500's compact 2U (88 mm) JIS/EIA rack-mount design maximizes valuable cabinet space, allowing additional instruments and test equipment to be integrated within the same rack. Rack-mount models (-RE, -RJ) are installation-ready, while the benchtop model (-BN) supports standalone operation when required.
Drop-in installation in standard JIS/EIA test racks
A model with a handle and feet or rack-mount brackets is available.
CAN data output
Real-time CAN/CAN FD communication streams measurement data directly to host systems, enabling efficient data integration and simplifying system-level evaluation in automated test environments.
* The /CN1 option is required.
Real-Time Data Integration with CAN/CAN FD Output
Low-latency data output via UDP
UDP communication provides continuous, real-time access to measurement data, simplifying system monitoring, accelerating abnormality detection, and supporting simultaneous acquisition from multiple networked instruments.
IEEE 1588 time-synchronized measurement with ScopeCorder waveform capture
IEEE 1588-compliant time synchronization enables precise correlation of WT1500 with compatible instruments, including the SL2000 ScopeCorder, enabling correlated power and waveform measurements with approximately ±10 μs timing accuracy. Timestamped data simplifies event correlation and timing verification.
* The /C40 option of the SL2000 is required.
Auto setup tuned for production signal variation
Built-in auto-setup functions simplify production testing by automatically adapting to changing input signals. Fast 10 ms updates, automatic frequency tracking, low-frequency measurement down to 0.1 Hz, and adaptive filtering ensure stable, accurate measurements without manual adjustment.
Image of operation in auto update mode
Easy connection with a wide range of current sensors, with phase compensation and offset cancellation support
Designed for seamless integration with Yokogawa AC/DC current sensors, the WT1500 automatically recognizes compatible sensors and configures current ratio and phase compensation settings*1. The built-in NULL function compensates for sensor offset, ensuring accurate and repeatable power measurements.
| *1: | When used with sensors that support automatic detection. |
| * | See page 14 for details on accessories. |
Connection examples with various current sensors
Headless control: built-in web server and WTViewerEfree
Remote operation is simplified through the WT1500's built-in web server, enabling browser-based instrument control and measurement monitoring over Ethernet.
Web server
The free WTViewerEfree software adds convenient PC-based control, real-time data visualization, and data transfer for up to two connected WT1500 units*.
* The /SY1 option is required for the WT1500.
WTViewerEfree
External USB-C touchscreen for standalone operation
Connect an external monitor via USB-C to display measurement values, waveforms, and instrument settings. Support for touch-enabled displays provides an intuitive user interface for convenient standalone operation.
Display of measurement values and waveforms with intuitive operation
Evaluation of Power Conditioning System (PCS)
Background/Challenges
Renewable energy systems are moving to higher operating voltages (> 1500 V) and multi-string architectures to improve efficiency and reduce costs. These trends increase the number of measurement points while demanding highly accurate power measurements.
WT1500 Solutions
- High-accuracy power measurement of ±0.038% (DC, 50/60 Hz)*2
- Measure up to 2000 V DC directly*3
- 20 synchronized power channels with centralized control*4
| *1： | Communication commands, web server and WTViewerEfree (free software) can be available. |
| *2： | This is accuracy of the WT1500. Accuracy of current sensor is added to this. |
| *3： | For measurements exceeding 1000 V, use the HV element, the 758932 high-voltage safety terminal adapter, and compatible cables. |
| *4： | The /SY1 option, the 720941 optical transceiver module, and the 720942 optical fiber cord are required. |
Efficiency Evaluation of EV Powertrains
Background/Challenges
EV powertrains are evolving toward integrated e-Axles and dual-inverter architectures to improve efficiency, reduce weight, and simplify system design. These architectures require simultaneous measurement of electrical and mechanical signals, including DC, AC, torque, and speed, across multiple power paths. As the number of measurement points increases, synchronized, high-accuracy multi-channel acquisition and seamless integration with control systems via interfaces such as CAN and CAN FD become essential.
WT1500 Solutions
- High-accuracy power measurement of ±0.038% (DC, 50/60 Hz)*2, with wideband performance up to 2 MHz*3
- Flexible, scalable channel configuration to support multi-inverter and multi-motor testing, with synchronization across multiple units*4
- Simultaneous measurement of electrical and mechanical signals, including support for encoder and resolver inputs*5
- Integrated data output via CAN/CAN FD for seamless connection to ECU and control systems*6
- Low-latency data transfer through UDP communication
| *1： | Communication commands, web server and WTViewerEfree (free software) can be available. |
| *2： | This is accuracy of the WT1500. Accuracy of current sensor is added to this. |
| *3： | A WB element is required. |
| *4： | The /SY1 option, the 720941 optical transceiver module, and the 720942 optical fiber cord are required. |
| *5： | As options, you can select the input signal (encoder or resolver) and the number of motors to be analyzed (1 to 4): /EM1 (up to 2-motor analysis with encoder), /RM1 (1-motor analysis with resolver), /EM2 (up to 4-motor analysis with encoder), /RM2 (up to 2-motor analysis with resolver), or /EM1RM1 (up to 2-motor analysis with encoder and 1-motor analysis with resolver). |
| *6： | The /CN1 option is required. Normal measurement data or harmonic measurement data can be output at each data update interval. |
Energy Efficiency Evaluation of Energy Storage Systems for Data Centers/EV Fast Chargers
Background/Challenges
High-efficiency power conversion systems, such as AI data center power supplies and EV fast chargers, continue to increase in power density, switching speed, and dynamic load behavior. Accurately evaluating AC/DC conversion efficiency, power flow, and energy transfer is essential to optimize performance, validate efficiency, and ensure reliable operation under both steady-state and rapidly changing load conditions.
WT1500 Solutions
- Power accuracy: ±0.038% (DC, 50/60 Hz)*2
- Measure AC/DC conversion efficiency with a single unit
- Measure power consumption of dynamically changing loads within 1% to 130% of the measurement range
- Measure integrated power (Wh) and integrated current (Ah)
| *1： | Communication commands, web server and WTViewerEfree (free software) can be available. |
| *2： | This is accuracy of the WT1500. Accuracy of current sensor is added to this. |
Duration testing and efficiency measurement for industrial motors (pumps & fans)
Background/Challenges
Modern inverter-driven pumps and fans demand accurate long-term evaluation of power consumption, efficiency, and energy usage by monitoring power fluctuations over long periods of time to optimize performance and validate reliability.
WT1500 Solutions
- Long-term integration function (Wh, Ah)
- Support current sensors without an external power supply
- Monitoring is possible via Modbus/TCP communication
Kataloge & Broschüren
- Features and Benefits Flyer WT1500 (5.3 MB)
- WT1500 Series Precision Power Analyzer (4.9 MB)
- CT1000S Split core current sensor (3.2 MB)
Datenblätter
Software
How-tos
Learn how to transmit measurement results to external devices via a CAN bus and make effective use of power measurement data with the Yokogawa WT1500. This feature helps streamline workflows from measurement to data utilization in development and evaluation environments.
Learn how to measure motor rotational speed using resolver signals. In addition to encoders, the Yokogawa WT1500 can also be utilized for motor evaluation applications that use resolvers.
Suchen Sie mehr Informationen über unsere Mitarbeiter, Technologie oder Lösungen?
Ihr Kontakt zu uns
