Measuring true power is more than multiplying voltage and current. Advances in complex power electronics and energy efficiency create measurement challenges that can confound even the most experienced engineers.
Unlike data acquisition and oscilloscope-based power measurement tools, power analyzers are purpose-built to guarantee measurement accuracy when testing devices that generate, transform, or consume electricity.
Yokogawa, the world's leading supplier of electrical power analyzers, provides solutions for testing power electronics, inverters, motors and drives, lighting, home appliances, office equipment, power supplies, industrial machinery and more.
|Number of Input Channels||1, 2 or 3||1 - 3||1 - 4||1 - 6||1 - 4||1 - 7|
|Basic Power Accuracy (60 Hz)||0.1% of Reading +
0.05% of Range
|0.1% of Reading + 0.1% of Range||0.01% of Reading +
0.03% of Range
|0.05% of Reading +
0.05% of Range
|0.1% of Reading + 0.1% of Range||0.01% or Reading + 0.02% of Range|
|Bandwidth||DC, 0.1 Hz to 100 kHz||DC, 0.1 Hz to 100 kHz||DC, 0.1 Hz to 1 MHz||DC, 0.1 Hz to 1 MHz||DC to 20 MHz||DC to 1 MHz|
The Yokogawa CW500 is a portable power analyzer that logs transient power phenomena in addition to measuring single to three phase power.
Yokogawa's Power Analyzer software manages numeric, waveform, and harmonic data measurements. It enables data logging and instrument configuration from your computer.
Accessories for digital power analyzers include various voltage and current transformers, clamp-on current probes, and a selection of test leads.
This panel-mounted power meter and energy meter with a large, three-row LED display integrates all the measuring functions required for power management in locations such as factories and buildings into a single unit.
In this application note you will learn when and how to use different methods to connect a current transformer to a power analyzer.
We have developed the WT3000 Precision Power Analyzer, which features the world's highest measurement accuracy of ±0.02% of reading and a measurement bandwidth of 0.1 Hz to 1 MHz as well as DC signals.
Government agencies that define the standardization of energy efficiency metrics continue to be a driving force behind the development of the next generation electric vehicle powertrains. These metrics require manufacturers to have high confidence in their measurements and motivate the optimization of efficiency.
Yokogawa developed the PX8000 precision power scope, a high-accuracy power meter, which can measure reactor losses in inverters, motors and the like, by analyzing waveforms. The major specifications of the instrument are as follows: basic accuracy is 0.2%, voltage measurement bandwidth is DC and 0.1 Hz to 20 MHz (-3dB, typical), and current measurement bandwidth is DC and 0.1 Hz to 10 MHz (-3dB, typical). The PX8000 offers the functionality usually provided by a waveform measuring instrument, such as a variety of triggers, tracking, statistical processing, and waveform parameter calculation functions. Furthermore, to improve measurement accuracy at low power ratios this product comes with a de-skew function for correcting signal delays from the current sensor and a data latency adjustment function. This paper describes the PX8000, focusing on a newly developed element dedicated for power measurement and technology for phase correction.
This white paper describes the WT1800, a precision power analyzer that has been replaced by the WT1800E, a unit with numerous improvements including better accuracy. Please visit the WT1800E product page to learn more about the WT1800E.
To keep pace with the increasing speed of switching devices in inverters, Yokogawa has developed the WT1800 precision power analyzer with 10 times faster sampling speed and 5 times wider frequency bandwidth compared with previous models. Its basic accuracy is 0.15% and the frequency bandwidth of voltage and current is 0.1 Hz to 5 MHz (-3 dB, Typical) including the DC component. With up to six inputs, a single WT1800 unit can measure the efficiency of three-phase inverters. In addition, the high-speed data capturing mode allows the WT1800 to measure transient power. This paper describes the high-speed, real-time power measurement technologies underlying these functions.
We have added a harmonics current/flicker measuring function to the WT3000 Precision Power Analyzer with world-leading accuracy of power measurement. We have also created PC software for harmonics current/flicker measurement. This PC software and the WT3000 comply with the IEC61000- 3-2 harmonics current standard and IEC61000-3-3 voltage fluctuation/flicker standard, thus enabling the electrical power, harmonics current and flicker of electrical equipment to be measured precisely with a single unit. This paper outlines the harmonics current standard and voltage change/flicker standard, along with the measurement principle and PC-based software of the WT3000.
In recent years, there has been an increased emphasis on energy efficiency in industrial systems, resulting in more penetration of power electronics in equipment such as inverters and motor drives.
Many industry trends are conspiring to make power analysis an important consideration for designers. The New Electronics editor takes a look at this expanding arena by talking to Hafeez Najumudeen of Yokogawa.
Clive Davis from Yokogawa's Europe T&M office describes a measurement system for real-time calculations of power and efficient in power electronics devices, and gives some examples.
Hafeez Najumudeen at Yokogawa Europe explores how power measurements are in increasingly vital aid to modern day energy efficiency.
The circuit design for the line filters used on the WT & PZ series instruments are similar to Butterworth filters but have been redesigned. We redesigned the original filtering characteristic to obtain a ...
When making a WT230 RS232C connection using GateWT, please verify the following RS232C communication settings on the instrument: Mode = 488.2 Hand = 0 For = 0 Baud Rate = 9600 Terminator Cr+Lf Even though you can run ...
Selecting formulas for calculating apparent power and reactive powerThere are several types of power—active power, reactive power, and apparent power. Generally, the following equations are satisfied:Active power P = ...
To programmatically read all 500 harmonic orders measurement values, please use the ":NUMERIC:LIST" command set. The maximum number of items for the :NUMERIC:LIST:VALUE? command is 64. However, 1 LIST ITEM can ...
The Power Analyzer Accuracy and Basic Uncertainty Calculator can be used to determine the uncertainty in voltage, current, and active power (watts) measurement values for various frequency ranges and wiring systems.
If the HOLD button was pressed when the WT210 was powered OFF, it causes the WT210 to display "-----" on the next time it is powered ON. You can revert back to a numerical display simply press the HOLD button.
This comprehensive training module covers the following topics:
This training module covers the following topics:
This comprehensive training module covers the following topics:
In this webinar, Yokogawa's Bill Gatheridge educates and provides attendees with practical solutions for making precision electrical power measurements. He also covers the use of a digital power analyzer, as well as the DO's and DON'Ts of using a digital oscilloscope for making electrical power measurements.
In this one-hour webinar, you will learn a three-step process for a complete electrical test of an AC motor & variable-speed drive system.
In this one-hour webinar you will learn about voltage and current harmonics. Specifically, you will learn how to measure and characterize this type of waveform distortion, and how it can affect your power system.
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