CW500 Power Quality Analyzer

Power Measuring

Power line and Input Channel: 3 CH Voltage, 4 CH for Current Clamp Probe.

1P2W (up to 4 systems), 1P3W (up to 2 systems), 3P3W2current (up to 2 systems), 3P3W3current, 3P4W

Power measuring item:

Instantaneous, average, maximum, and minimum values for each setting period:

Voltage/Current/Power (Active, Reactive, Apparent)/Power Factor/ Phase Angle/Frequency/Calculated Phase Shift Capacitance/DC voltage value 2 CH.

Integration Value

Energy (active, reactive, apparent), Demand (list or graph display of change in a specific period and as a whole)

Recording Interval Period

1/2/5/10/15/20/30 second, 1/2/5/10/15/20/30 minute, 1 hour/2 hours

Recording method

Manual, time, period

Estimated Recording Length with 2 GB SD card

• The recording length shortens according to the number of power quality events.
• Only the included SD memory card or dedicated SD memory card is guaranteed.

Various Measuring Screen

List display, zoom display by 4 or 8 divisions, trend graph display, integration value display for energy, demand list display of value, demand graph display for change of period, demand graph display for whole recording

List Display

Hems of measuring values can be selected with position.

Zoom Display

Zoom display can be selected by 4 or 8 divisions.

Trend Graph

Trend graph of voltage/ current/power/power factor/frequency/ advanced phase condenser external DC voltage.

Energy Display

List of active, apparent, reactive by consumption or generation.

Demand measuring

Demand is the average power value of a specific period (usually 30 minutes). The contract with the power supplier conditionally concerns the maximum average power value between a period for the consumption fee. This function supports how to maintain within the target consumption by monitoring the estimated demand value to the setting rate with the maximum demand value.

List of Demand Value

Graph display of change on specific period

Graph display of whole demand trend

Analysis and Reporting of recorded data

Trend analysis graph

Sample of report

Power Quality Function

Short period power line malfunctions such as voltage swells, dips, interruptions, transients, over or inrush currents, or long periods of harmonic distortion/flicker may damage or reset your devices.

The CW500 helps to identify each of those short period malfunctions by recording occurrence time, occurrence finish time and waveforms. Additionally there is a digital output on occurrence.

Long period malfunctions can be analyzed by harmonics, flicker, waveform, or by checking on the unbalance rate calculation for a 3 phase measurement.

All data can be finalized into a report format with the included software. The CW500 conforms to the IEC standard of 61000-4-30 Class S.

User Support Function 

User Friendly

Quick start guide and automatic type of clamp recognition

The quick start guide will show on-start measuring  and how to wire and set the range before measuring. The automatic clamp detection will insure the settings are correct.

Start of guidance

PUSH the “START/STOP” key.

Select “Quick start guide”.

Select recording item.

Wiring

Select the wiring and the appropriate connection diagram will be displayed. 

Connect accordingly.

Wiring check/self diag./self id. 

Wiring check, self-check and the type of clamp is automatically detected and the results displayed. 

If NG is displayed, the detail can be confirmed by pressing the “ENTER” key.

Recording setting

Set the recording interval time and the recording time or period.

Power supply from measuring line

Power (under 240 VAC) can be supplied by using the power supply adapter  (sold separately).

Note: This is not available for EV region.

Leakage current measuring

The external magnetic field effect is 0.002 A or less, at 400 A/.

Yokogawa’s proprietary technology has achieved a magnetic field impact amount of 30 ppm even in adjacent power lines (at 100 A).

Below is an example of how to measure a neutral line of 3 phase 4 line.

Multiple line measuring

4 system load measuring

Maximum of 4 systems is capable for 1 phase 2 line Maximum of 2 systems is capable for 1 phase 3 line or 3 phase 3 line.

Software for Analysis and Setting (Free) CW500Viewer

Data analysis, data reporting, making a setting file and doing a real time measurement can be easily done with the CW500Viewer.

The data can be transferred by SD memory card, USB communication or Bluetooth communication (for USA, Canada, Japan only).

The graph and lists are created by a click on the data file.

• The graph and lists of the recorded data file are created by clicking on the desired data file. They can be displayed and copied on a clipboard so it can be used on other software such as Word or Excel.
• The time axis and measure axis can be zoomed in or out easily. With this capability, micro and macro changes can be displayed.
• Waveforms of power quality events (Voltage swell, voltage dips, voltage interrupt, voltage transient, (over and inrush current) which are recorded by 200 ms period can be displayed and printed.
• The integrated data can be added on one graph, enabling the whole energy integration data to be displayed.
• Integrated energy data can be scaled into CO2 or the crude oil value.

Settings management

• Setting data can be read out from and to the main unit via SD memory card, USB communication cable or Bluetooth communication (*1).
• Setting data can be easily edited, saved and managed.

Real time measurement

• Real time measurement can be performed on up to 2 units simultaneously via USB communication or Bluetooth communication (*1)

System Requirements

Power Measuring + Power Quality Examination

Examination of main power line quality for factory system control and assets

• Confirm the quality of power lines for factory system control and assets.
• Simultaneously measure the consumption of energy trend and consider solutions for energy saving.

The CW500 not only continuously measures harmonics but it also captures malfunctions of the power line and records the occurrence time with waveforms. Simultaneously, it can measure the power and leakage current of a neutral phase. Additionally, users can confirm the condition of assets when signals are connected to the DCV input channels.

Power Line Measuring Examination

Checking Energy Efficiency of LED lighting

Verify the energy saving effects of LED lighting compared to standard incandescent lighting by performing before and after measurements.

Checking power consumption of driving pumps of a manufacturing line

Inverters were installed on many driving pumps in liquid manufacturing lines, and power consumption measurements are needed to check the before and after effects.

Multiple parameters can be set and measured by the PC software. Additionally, the power line quality can also be tested to assure the new inverters can be operated safely.

Improving power line quality of a printing factory by measuring harmonics (Printing factory)

Purpose: Investigation of the cause of constant malfunctions for printing machines.

Harmonics distortion on line could be the reason?

Measuring: CW500 key features

• Compact and easy to carry.
• Measures harmonics up to 50. 
• Long term recording

Result: Confirming high level harmonic contents on 5th  and 7th.

Many damaging harmonics are discovered in the 5th and 7th harmonics. 5th harmonic content can damage the calculation of capacitance for improving power factor.

Improving the power factor for power efficiency

The CW500 can calculate the appropriate capacitance value by setting the aimed power factor value.

By setting the proper capacitance calculation and improving the power factor, users will benefit from power savings with less load current and improve the capacity of the whole power system.