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YOKOGAWA WT1500 SERIES PRECISION POWER ANALYZER
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