Yokogawa Announces WT1800E Precision Power Analyzer

Yokogawa Corporation of America announces its latest precision power analyzer, the WT1800E.  This updated edition of Yokogawa’s highly recognized digital power analyzer product line offers innovative measurement functions with high performance and flexibility, allowing engineers to make electrical power measurements with high accuracy and precision.  It is the ideal measurement solution for testing product efficiency and the design of inverters, motor drives, lighting systems, uninterruptible power supplies, aircraft power systems, renewable energy generation and other power conversion devices.

In developing the WT1800E, Yokogawa engineers improved measurement efficiency in two basic areas.  One goal was to obtain highly precise and simultaneous measurements on the input and output of power conversion devices. The other objective was to improve equipment evaluation efficiency by making simultaneous power measurements and tests easier and faster.  The WT1800E can perform up to six power measurements simultaneously, which enables efficiency tests between the input and output of products such as inverters.   The WT1800E was designed for both today’s power measurements and for the advanced complex requirements of future power conversion products.

Many power conversion circuits use energy saving switching techniques that can cause distorted voltage or current waveforms with high harmonic content.  To measure these waveforms accurately, the WT1800E uses high-resolution 16-bit analog to digital converters with a digitizing rate of 2 MS/s.  Users can measure power from DC and 0.1 Hz to 1 MHz. Basic power measurement accuracy at 50/60 Hz has been improved to 0.05% of reading plus 0.05% of range.

For electric motor testing, the WT1800E offers a unique and powerful “motor evaluation” function as an option.  With a single WT1800E, you can measure all the electrical power parameters along with rotation speed, torque, mechanical power, synchronous speed, slip, motor efficiency and total system efficiency.  In addition, a measurement function has been added to enable detection of the rotation direction of the motor and the electrical angle.
Applications that require continuous automatic testing of EV/PHV / motor drives and other rotating devices with varying speed can benefit from the new ability to automatically set the measurement interval. The WT1800E offers nine data update rates from 50 ms to 20 sec that can be set manually or automatically.

In photovoltaic power generation, a Maximum Peak Power Tracking (MPPT) measurement is performed to maximize the harvested power generated by photovoltaic cells.  To accomplish this, the WT1800E is capable of measuring voltage, current and power peak values. 
The power integration function measures the amount of power sold or purchased in grid interconnection applications.  The WT1800E features auto ranging during integration and Yokogawa’s “average active power” function, making it possible to measure power consumption under conditions where the power fluctuates greatly.

Several options assist with more direct connection to sensors, simplifying tests by avoiding the use of separate hardware. A new current sensor power option can power up to six current sensors directly with a +/-15V supply. With dedicated accessories, the current sensor power option can dramatically improve immunity performance against noise (influence caused by high frequency common mode voltage). 

All the latest communication interfaces such as Ethernet, USB and GPIB are included in the WT1800E.  New support for the Modbus/TCP protocol enables connection with PLCs and recorders. Further, users can plug in USB removable storage media for local data transfer. 

The base price for a three-phase WT1803E is $13,165.

About Yokogawa Corporation of America
Yokogawa Corporation of America (http://yokogawa.com/us) is a leading provider of Industrial Automation and Test and Measurement solutions.  Combining superior technology with engineering, system integration, project management, and maintenance services, Yokogawa delivers field-proven operational efficiency, safety, and reliability.  Yokogawa Corporation of America is headquartered in Sugar Land, TX, and is the North American Division of Yokogawa Electric Corporation's global network of 25 manufacturing facilities and 4 regional project engineering centers.

About Yokogawa
Yokogawa's global network of 92 companies spans over a total of 59 countries. Founded in 1915, the US$3.7 billion company engages in cutting-edge research and innovation. Yokogawa is active in the industrial automation and control (IA), test and measurement, aviation, and other business segments. The IA segment plays a vital role in a wide range of industries including oil, chemicals, natural gas, power, iron and steel, pulp and paper, pharmaceuticals, and food. For more information about Yokogawa, please visit our website www.yokogawa.com.