WT1500 Precision Power Analyzer
Continued growth in xEV technologies and renewable energies is accelerating demand for evaluation, testing, and production capabilities built around high-voltage equipment. Target voltages within these systems can reach the thousands, requiring specialized high-voltage divider equipment in typical analysis set-ups. These dividers can introduce measurement errors, reducing overall accuracy while complicating wiring and equipment installations. Additionally, conventional motor efficiency measurements require separately measured power and resolver signals to be synchronized on a PC.
Existing power analyzer models lacked the required voltage input range for Energy Storage Systems (ESS) and Power Conversion Systems (PCS) or resolver support motor testing, or were too large to fit within conventional rack-mounted or desk-based setups. Yokogawa Test & Measurement specifically developed the WT1500 to address this gap, delivering the necessary capabilities and functionality while eliminating the need for high-voltage dividers for systems up to 2000 V, all within a compact 19 inch width, 2U height design.
High performance
The WT1500 achieves a total power accuracy of ±0.038% (DC, 50/60 Hz) and low-power-factor accuracy of ±0.07% of S at 50/60 Hz, the best figures of the WT series, and supports two types of input elements, High Voltage (HV) and Wide Bandwidth (WB). The HV element supports direct measurement up to 2000 V DC and 300 kHz, ideal for high-voltage PCS and ESS applications. The WB element supports up to 1000 V with a 2 MHz bandwidth, crucial for measuring the complex, high-frequency waveforms generated in modern xEV motors. Both inputs share a common sensor input and can be mixed in a single unit.
System integration and a space-saving design
The WT1500’s compact 2U height (approx. 88mm) design supports four power measurements and four motor evaluations, including both encoder and resolver signal inputs, IEEE 1588 time synchronization, and data output to CAN/CAN-FD buses and low-latency data transmission via UDP communication. It is equipped with a variety of interfaces for remote control via PC, external monitor or tablet and features a small front panel for straightforward connection setup or even to be used as a standalone instrument. The WT1500’s high space efficiency allows easy integration into evaluation system racks.
Scalable measurements
For measurements requiring more than four channels, up to five WT1500 units can be synchronized, enabling 20-channel power measurement. One unit acts as the main controller, directing subunit configuration and consolidating data acquisition. Multi-unit synchronization support will be released soon.
4 Power + 4 Motor Channels in Just 2U
Class-Leading Accuracy, High Voltage & Wide Bandwidth
Broad Current Sensor Compatibility
20 Synchronized Power Channels
*1: Total accuracy. Current sensor accuracy is added to power accuracy.
*2: A current sensor is required for current measurement. Current sensor accuracy is added to current and power accuracy.
*3: Can also be connected using the 761966 conversion adapter and the 761954/55/56 dedicated cable.
*4: 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.
Front Panel/Rear Panel (EIA Rackmount model -RE)
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. |
| *5： | A WB element is required. |
| *6： | 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). |
| *7： | The /CN1 option is required. Normal measurement data or harmonic measurement data can be output at each data update interval. |
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*5
- Flexible, scalable channel configuration to support multi-inverter and multi-motor testing, with synchronization across multiple units*2
- Simultaneous measurement of electrical and mechanical signals, including support for encoder and resolver inputs*6
- Integrated data output via CAN/CAN-FD for seamless connection to ECU and control systems*7
- 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： | 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. |
| *5： | A WB element is required. |
| *6： | 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). |
| *7： | The /CN1 option is required. Normal measurement data or harmonic measurement data can be output at each data update interval. |
일반 페이지
- WT1500 Series Precision Power Analyzer (1.5 MB)
- Current Sensors & Probes CT2000A /CT1000A /CT1000 /CT200 /CT60 /751552 (2.5 MB)
- CT1000S Split core current sensor (3.2 MB)