개요

WT1800 모델은 인버터, 모터 드라이브, 조명 시스템, 무정전 전원 공급 장치, 항공기 전원 시스템, 변압기 시험 등의 효율성 테스트를 위한 측정 솔루션을 제공합니다.


특징

■ 전압과 전류 주파수 대역 5MHz(-3dB, Typical) : 이전 모델보다 5배 증가
　전압과 전류 주파수(5MHz)가 이전의 5배 넓어졌으며, 빠른 스윗칭 신호들을 조금더 정확하게 잡아낼 수 있다.
■ 낮은 Power-Factor 에러율 0.1%로 감소 : 이전 모델 2/3
■ 기본 정확도: ±0.1%
■ 직접 입력 가능한 넓은 전압과 전류영역
■ WT1800 Direct input Voltage/Current Specification
　- Voltage : 1.5V ~ 1000V (12 ranges)
　- Current : 10mA ~ 5A (9 ranges) / 1A ~ 50A
■ 0.1Hz의 낮은 속도 신호 전원측정과 최대 50ms의 고속 데이터 수집
■ Dual 고조파 측정 기능(옵션)
■ 2개 채널의 외부신호입력은 전력측정과 아날로그 신호 데이터 측정
　(모터 평가 기능과 결합한 옵션으로 가능)
■ 전기적인 각도 측정 지원. 모터 평가기능은 A상, B상과 Z상 입력을 따른다.
　(외부신호입력과 결합한 옵션으로 가능)


기본사양

■ 측정 전압 레인지 : (crest factor 3) 1.5/3/6/10/15/30/60/100/150/300/600/1000V (DC, 0.5Hz ~ 1MHz)
■ 측정 전류 입력 레인지 (직접 입력, crest factor 3)
　- 5A 입력 엘리먼트 : 10/20/50/100/200/500 mA, 1/2/5 A (DC, 0.5Hz ~ 1MHz)
　- 50A 입력 엘리먼트 : 1/2/5/10/20/50/A (DC, 0.5Hz ~ 100kHz)
　- 외장 센서 입력(5A와 50A 입력 엘리먼트와 동일)
　- 옵션 : 50/100/250/500 mV, 1/2.5/5/10 V (DC, 0.5Hz ~ 500kHz)
■ 기본정확도 : (45 Hz ≤ f ≤ 66Hz)
　- 전압/전류/파워 : ± (0.1% of rdg + 0.05% of rng)
■ 파워팩터의 효율 (cos ¢ = 0) : ± 0.15% of rng 추가
■ 외형사이즈 : 약 426(W) x 177(H) x 459(D)mm
■ 중량 : 약 15kg (6개 입력 엘레먼트 포함)

This new addition to Yokogawa's highly recognized digital power analyzer product line offers innovative measurement functions

which benefit the engineer with electrical power measurements. 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, Transformer

Testing and other power conversion

Name	Description	File Type
BU WT1800-00EN	WT1800 High Performance Power Analyzer	5.52 MB	Download

 

<FEATURES>

Many features are available that are a first in the power measurement industry *1

Measurement - High-precision, wide range, fast-sampling, simultaneous harmonic measurement

Voltage and current frequency bandwidth 5 MHz (-3 dB, typical)

Faster switching frequencies increasingly require measurements in a wider range. The WT1800 provides a voltage and current frequency bandwidth (5MHz) 5-fold wider than the previous measurement range and is capable of more correctly capturing fast switching signals.

Reduction of low power-factor error to 0.1% of apparent power (2/3 of previous model)

A power-factor error is one of the important elements to ensure high-accuracy measurements even at a low power factor. The WT1800 has achieved a power-factor error (0.1%) that is 2/3 of the previous model, in addition to a high basic power accuracy of ±0.1%.

Wide voltage and current range allowing direct input

Direct input of measurement signals makes it possible to measure very small current that can hardly be measured with a current sensor. The WT1800 provides a direct input voltage range from 1.5 V to 1000 V (12 ranges) and a direct input current range from 10 mA to 5 A (9 ranges) or from 1 A to 50 A (6 ranges).

0.1 Hz low-speed signal power measurement and max. 50 ms high-speed data collection

The frequency lower limit has been reduced to 0.1 Hz from the previous 0.5 Hz (5-fold lower than the previous model) to meet the requirement for power measurements at a low speed. Furthermore, high-speed data collection at a data update rate of up to 50 ms has been inherited. In addition to normal measurement data, up to the 500th order harmonic data can be measured and saved simultaneously. The data update rate can be selected from nine options from 50 ms to 20 s.
* Harmonic measurement at the 50 ms data update rate is possible up to the 100th order.

Particular voltage and current range selectable

Wide voltage and current input ranges have the advantage of extending the measurement application range. However, the downside is that the response time of the auto range tends to slow down. A range configuration function solves this problem. Since only the selected range (effective measurement range) can be used, the range can be changed up or down more quickly.

* Comparison with Yokogawa's previous model WT1600

*1: Applicable to a general-purpose high-precision three-phase power analyzer as of February 2011 (according to Yokogawa's survey).

Support for Energy Conservation Technologies and Sustainable Energy Development

Dual Harmonic Measurement The perspective of the efficient use of energy is boosting demand for inverters to convert 50Hz or 60 Hz AC power to DC power, grid connection controllers to control reverse power flow occurring due to excess power, and battery chargers/dischargers. The WT1800 is capable of simultaneously measuring the harmonic distortion of the input and output current of these devices. Challenging the common wisdom that "harmonic measurement is limited to a single line," the WT1800 is capable of performing two-line simultaneous harmonic measurements. The WT1800 is also capable of measuring up to the 500th order harmonic even at high fundamental frequencies such as a 400 Hz frequency.

Customize Display Screen The perspective of the efficient use of energy is boosting demand for inverters to convert 50Hz or 60 Hz AC power to DC power, grid connection controllers to control reverse power flow occurring due to excess power, and battery chargers/dischargers. The WT1800 is capable of simultaneously measuring the harmonic distortion of the input and output current of these devices. Challenging the common wisdom that "harmonic measurement is limited to a single line," the WT1800 is capable of performing two-line simultaneous harmonic measurements. The WT1800 is also capable of measuring up to the 500th order harmonic even at high fundamental frequencies such as a 400 Hz frequency.

<FUNCTION>

New functions greatly support power measurements

Dual harmonic measurement (option)

The industry's first two-line simultaneous harmonic measurement is available, in addition to simultaneous measurement of harmonic and standard measurement items such as voltage, current, and power values. Previously, harmonic measurements of input and output signals
had to be performed separately. With the WT1800, harmonic measurements of input and output can be performed simultaneously.

Two-channel external signal input is available for power measurement and analog signal data measurement

(option available in combination with the motor evaluation function) Power measurements can be performed together with physical quantity data such as solar irradiance or wind power in wind generation.

Electrical angle measurement is also supported.

Motor evaluation function allowing A-phase, B-phase, and Z-phase inputs (option available in combination with external signal input) Pulse or analog signals can be input for rotation speed and torque signal measurements. The motor evaluation function of the WT1800 makes it possible to detect the rotation direction and measure the electrical angle, which is not possible with Yokogawa's previous model.

High Resolution Display

All Data of 6-input, Single/Three-phase Devices can be Viewed on a Single Screen
Important Information is Displayed in a Concentrated Format on High Resolution 8.4-inch XGA Display

A high resolution display with a resolution about 2.6-fold higher than Yokogawa's previous model* is employed. More setting information and measurement data can be displayed

*Comparison with Yokogawa's previous model WT1600

Computation Range Display

Direct display of primary current values

The setting ranges of voltage and current are usually displayed with voltage and current signal levels that are input to the power analyzer. The WT1800 provides not only this direct display but also added a new computation range display function to the external current sensor range. This function allows you to display the primary current range for the voltage output type current sensor. It allows you to intuitively set a range that is suited to the primary measurement signal level.

User-defined event function

Capture only a particular event
	The data saving function of the WT Series is capable of continuously saving data for a long period of time. However, to check an irregular event, data must be retrieved using spreadsheet software. The event trigger function allows you to set the high and low limits and only trigger data that falls into or out of that range to be saved.

Individual Null Function

Function to reset only a particular input signal to zero
	A null function allows you to reset the offset value to zero in the connected state. Previously, all inputs could only be collectively set to ON or OFF. With the WT1800, the null value for each input can be set to ON, HOLD, or OFF. In a motor evaluation test, the offset value for only a particular input can be reset to zero. This makes it possible to perform a more accurate motor evaluation test.

Help Function

Display the manual on the screen
English help menu supports measurement	Display the manual on the screen Frequently used functions (keys) can be performed without the instruction manual. You may, however, want to use a new function during evaluation. The WT1800 includes a built-in instruction manual on the functions, so if a new operation is required, you can read the explanation of the function on the screen.

Line Filter

Capture an original signal masked by high frequency component

In power evaluation such as an inverter waveform and distorted waveform, measurement values are affected by high frequency component. A new digital filter function makes it possible toremove unnecessary high frequency components superimposed on signals. A filter can be independently set for each input element. An analog filter for 1 MHz/300 kHz, and digital filter that can be set from 100 Hz to 100 kHz in increments of 100 Hz are available as standard.

Range configuration function

High-speed range setting suited to input signals

Numerical and harmonic bar graphs

Dual Harmonic Measurement

A harmonic measurement option (/G5) makes it possible to display both numerical data and bar graphs to help understand measurement data visually. In addition, a dual harmonic measurement function (/G6) makes it possible to measure and display two-line harmonic bar graphs (dual harmonic) simultaneously.

Waveform

Support for 6 split screen displays

A high resolution display makes is possible to split the waveform display into up to 6 split screens. This makes it possible to split the display of signals between the input and output of a three-phase inverter and display them simultaneously. Waveform display allows you to display waveforms for the voltage alone or the current alone, or arbitrarily set the display position, so you can also display only the signals you want to compare one above the other.

Dual Vector

Simultaneous two vector displays

Trend

Capture efficiency changes visually

When evaluating inverter efficiency, sometimes small efficiency changes can hardly be recognized with just numerical values. Trend display makes it possible to display measurement values and measurement efficiency as trend data in time series to help capture even small changes visually. Trend data over several minutes or several days can be displayed.

Setting Information

Combination display of information and numerical screens

The screen can be split into two, with one above the other, and two types of screens can be displayed simultaneously. Screen can be selected from Numerical, Waveform, Trend, Bar Graph, and Vector displays. Another new function allows you to press the NFO button on the Numerical screen to display the setting information in the upper row and automatically scale down the numerical nformation displayed in the lower row.

Custom

Customize display screen

Image datea can be loaded onto the screen and the position and size of the numerical data can be specified.  The display screen can be customized so that the corporate log of your company is displayed on the screen, or only the measurement items you want to view, such as input and output efficiency and frequency, are displayed one above the other.