Yokogawa CW120, CW121 Data sheet

Models CW120,CW121 Model CW240 AP240E Data Analysis Program

AP240E Data Analysis Program

1

Bulletin CW-E

Realization of Power & Power Quality

Realization of Power & Power Quality

Management using a CW240

Management using a CW240

CASE 1

CASE 2

CASE 3

2

2

Get a view of energy consumption!

It is essential to measure energy and manage consumption of each sector such as
facility and production line for your energy saving activities and to minimize loss.

Contribute for improving productivity!

Constantly analyze productivity by managing unit consumption. Managing
voltage, current, electric power and power factor makes for good maintenance of
production facility.
Moreover, you can check operation management loss and enhance productivity.

Discover of electric power waste!

Measure and collect data of electric power consumption by short period.
The CW240 can figure out load of production process, and has the ability to check
wasteful time and current flow of standby load current.

CASE 4

Detect voltage fluctuation!

When trouble occurs on supply side of electric power, instantaneous voltage drop
can affect quality of produced goods at the factory. The CW240 is useful for
collecting data such as voltage fluctuation to prevent such problems.

Characteristics of CW240

 Simultaneous measurement of instantaneous value, electric energy, demand, harmonics

and voltage fluctuation.

 Simultaneous measurement of loads in 4 systems of up to 1P2W

Simultaneous measurement of loads in 2 systems of up to 1P/3P3W

 Data saving interval can be set from 1 waveform (for instantaneous measurement) to 1

hour.

 Measure up to 50th order harmonics
 4ch leakage current measurement using newly released clamp probe 96036
 Long time data logging by using compact flash memory.
 Multi language for the display (English, German, French, Italian, Spanish, Korean and

Chinese)

 2ch analog input (Optional)

Equipped with 4ch analog output (recorder output)

 AC adaptor for power supply. NiMH rechargeable battery and alkaline battery for

backup

Voltage input terminals

RS-232C connector

Current input terminals

●With protection against H/L reverse connection of current clamp-on probes

●With protection against connection of voltage cables

External control I/O
terminals

Analog I/O terminals
(Optional)

CW240

CW240

Protective cover

CW120 AP240E

Card ejection button

PC card slot

Starts/stops integration measurement.

System Configuration Block Diagram

CW240: Simultaneous measurement using two or more CW240 units

External contact signal

ENTER

START

&STOP

PC

Printer

START

&STOP

RS-232

Saves or prints the
measured data.

Makes a screen hard copy.

Returns to the TOP MENU.

Switches the voltage/current range to another.

Turns ON/OFF the backlight (locked when held down for a while).

Current input

(clamp)

CLAMP-ON POWER METER

DA output

(4 channels)

Analog input

(2 channels)

PC card

ENTER

External
control I/O
terminals

Voltage input

Battery holder lock switch

MV series: Recorder

510 series

Illuminance

meter

Battery holder

JUXTA

Temperature

converter

3

AC adaptor

LIGHT

START

&STOP

510 series Illuminance meter
Product of Yokogawa Meters & Instruments Corporation

MV series: Recorder and JUXTA
Product of Yokogawa Electric Corporation

Alkaline battery

TOP

ENTER

MENU

ESC

RANGE

RANGE

A

SAVE

DISP COPY

NiMH battery pack

Measurement of Instantaneous

Power

Investigation

Power Investigation Improves power Efficiency Through Detailed Data Coll

Measurement of Instantaneous

Value: For investigation of power consumption, maximum load factor and peak currentMeasurement of Instantaneous Value: For investigation of power consumption, maximum load factor and peak current

The CW240 can be used to carry out investigation regarding renewal of electric equipment such as transformers in
building, check load factors and demand factors, and to check current/voltage fluctuation at motor start-up.

(Example of screen display)

● Measurement elements : Voltage/current/electric power (active, reactive, apparent)/power factor/phase angle of each phase,

● Data collection time : 1/2/5/10/15/30 seconds, 1/2/5/10/15/30/60 minutes

Convenient

functions

average/minimum/maximum values of each measurement element.

One cycle (waveform), 100/200/500 ms (short time interval)

Use of the 3-wattmeter method enables display of instantaneous value of each
measurement element.

Allows switching data
from one to another
and saving data.

4

Solution

Food processing plant

Purpose : To review the current power equipment, and replace it

if necessary but with low investment cost

Solution 1 : Calculation of the amount of used water based on power

Solution 2 : Introduction of invert pump control

Power comparison before and after

implementation of the solution

14

12

10

8

6

Powe r (kw)

4

2

0

0:00

2:00

Investigation into Energy Saving at Factories and Buildings

Facility investigated: Pumps

consumption since flow meters are expensive

Power

measurement

before after

Water supply

pump

Water supply

pump

AP240 Suitable for
Data Analysis!

4:00

6:00

8:00

10:00

12:00

Time

14:00

16:00

18:00

20:00

22:00

CW240

Clamp-on power meter

Water supply

pump

Water supply

pump

Energy saving & Reduce electricity bill

Demand Measurement:

wer Quantity Measurement:

ection.

CW240

Power Quantity Measurement:

For Power-Saving Diagnosis and Data Collection for ISO14001Power Quantity Measurement: For Power-Saving Diagnosis and Data Collection for ISO14001

The CW240 can measure and display the power quantity consumed up to the specified
time (from the start of integration until the end).

● Measurement elements : Active power quantity, regenerative power quantity, reactive power

quantity (leading/lagging)

● Data collection time : 1/2/5/10/15/30 seconds, 1/2/5/10/15/30/60 minutes

Convenient

functions

The number of display digits and display units can be selected.

●Standard (Voltage/current range is selected according to the phase)

●Arbitrary (Decimal point position and display unit can be specified)

●Auto (Decimal point position and display unit are selected automatically according to

the integration result)

Demand Measurement:

For Review and Investigation on Contract DemandDemand Measurement: For Review and Investigation on Contract Demand

● Measurement elements : Maximum power demand required since the start of logging measurement

and the time it occurs

Active power, reactive power (lag), power factor
Active power quantity (consumption, regeneration), reactive power

quantity (lagging/leading)

Convenient

functions

Normally, the demand time limit is set to 30 minutes in the
contract with a power company.
However, the CW240 allows you to set the desired demand
time limit in units of seconds/minutes.

Demand time limit setting : 1/2/5/10/15/30 seconds, 1/2/5/10/15/30/60 minutes

(Example of screen display)

CW120 AP240E

(Example of screen display)

● Demand

Demand time limit : Length of time set to obtain the average power (normally 30 minutes)
Demand power : Average power during the demand time limit

Solution

Energy Saving and Maintenance for Electric Equipment at Factories and Buildings

Investigation at
offices

●Air conditioning

●Lighting

●Office automation

equipment

●Elevator

Investigation at
production
departments

●Power quantity

●Investigation of

electric power
consumption rate

●Production

quantity

●Power factor

Elevator

Distribution

board

Cellulametal floor duct

Distribution board

Distribution

board

Personal computer

Control

panel

Lighting

Personal computer

CW240 solution (building)

1. For energy investigation/control for each application
and floor

2. For simple investigation for each shop and tenant

3. Diagnosis of operational status of equipment such as
elevator and air conditioner

4. Diagnosis regarding renewal of electric equipment

CW240 solution (factory)

1. Diagnosis of operational status of equipment such as

production equipment and air conditioner

2. For investigation of electric power consumption rate for
each production line

3. For energy investigation/control for privately-owned
electrical power facilities

4. For control of monthly target energy consumption

5

Power Supply

● Harmonics for analysis : 1st to 50th

● Display data : List, bar graph (linear/log), vector (inflow/outflow judgment)

● Measurement elements : Level, content, phase angle (voltage/current/electric power of each harmonic), aggregate value (voltage,

current, electric power, power factor), aggregate harmonic distortion factors (THD-F or THD-R) of
voltage/current

● THD-F : Distortion factor for the fundamental wave, THD-R: Distortion factor for all rms values voltage/current

● Data collection time : 1/2/5/10/15/30/60 minutes

Quality Control

Harmonic Measurement

In many cases, inverter power supplies are used to drive air-conditioners and compressors. These power supplies
cause distortions in voltages and currents, leading to malfunctions and power loss. Therefore, investigation and
control of influences on the main power supplies by harmonics is necessary.

Discovers Failures in Power Supply Lines.

(Example of graph display) (Example of list display)

Convenient

functions

The harmonic whose data is
required to be saved can be selected.
Inflow/outflow of harmonics can be
checked.

●THD-F

Distortion factor for the fundamental wave, THD-R: Distortion
factor for all rms values

(Influences by harmonics)

Category Device Influence type

Power devices

6

Electronic/electrical
household
appliances

Solution

Capacitor, reactor

Transformer
Fuse, breaker

Induction motor

Protective relay
Electrical household
appliances
Fluorescent lamp,
mercury-arc lamp
Computer
Electronics device

Overheat, burn, vibration, noise due to
excessive current
Overheat, noise, increase in core/copper loss
Blow-out, malfunction due to excessive
current
Periodic fluctuation of revolution speed,
overheat, increase in loss
Malfunction
Flickering, noise, malfunction, breakdown

Burn of stabilizer/capacitor, flickering

Malfunction, out of control, breakdown
Malfunction of automatic control part

Improvement of Harmonic Measurement and Diagnosis

: Inflow of harmonic

: Outflow of harmonic

Explanation of vector diagram

● Vector length indicates the apparent
power of each harmonic in
proportion to that of the fundamental
harmonic.

● The horizontal axis shows active
power and the vertical axis indicates
reactive power. They are shown in a
logarithm.

● Frequencies shown are those of the
measurement element actually
measured.

Printing plant

Purpose: To investigate the cause for periodic breakdown of printing machine

Measurement: Advantages obtained by using the CW240

Result: Occurrence of harmonics in 5th and 7th was discovered!

Before

solution

Countermeasure: Installation of transformer filter for 5th and 7th harmonics

After

solution

It may be caused by harmonics generated in the power lines.

●

Compact and easy to carry ● Measurement of up to the 50th harmonic

●

Long-term data collection ● Vector diagram display

In addition, it became clear that harmonics are generated due to loads inside the factory.
In perticular, the 5th harmonic causes adverse effects such as burn-out of the serial reactor in the
capacitor used to improve the power factor.

Time series for

each harmonic for current 1

Discovery

of

the cause

Time series for

each harmonic for current 1

Content for

each harmonic for current 1

Content for

each harmonic for current 1

Total harmonics distortion for

current 1

Total harmonics distortion for

current 1

Confirmation

of

inflow

500kV transformer

Effects of countermeasures: The contents of 5th and subsequent harmonics decreased drastically
and the distortion ratio also dropped below 30%, resulting in elimination of breakdowns.

Waveform Measurement

Measurement results

● Measurement elements :

Voltage of each phase, current of each phase
Voltage and current of each phase

● Data saving format :

Binary (can be converted to CSV format
using a standard application program)

The scale of the vertical axis can be changed from x1/3 to x20.

Easy to understand waveform distortion.

Voltage Fluctuation Measurement

The CW240 detects dates/times of when fluctuations occur, fluctuation type,
channels where they occur, rms values, and periods between start and end. The
voltage threshold is set, and fluctuations exceeding the threshold are detected.

● Measurement element : Voltage dip (voltage drop), voltage swell (voltage rise),

instantaneous power failure

lData saving : Detected based on the voltage rms value of one waveform.

Up to 100 data sets can be saved.

CW240

CW120 AP240E

Normal period Fluctuation period Normal period

Measurement results

Convenient

functions

It is possible to provide a voltage
difference between start and end
by setting a hysteresis.

Failures in power supply lines

Item Phenomenon Problem

Voltage dip
(Sag, voltage drop)

Voltage swell
(Voltage rise)

Instantaneous
power failure
(Instantaneous stop
of power supply)

A voltage drop occurs for a short
time due to the occurrence of a large
inrush current, for example, when a
motor is started.
Voltage increases instantaneously,
for example, when lightning occurs
or when a power line with a heavy
load is turned ON/OFF.
Power supply is stopped
instantaneously or for a short/long
time, for example, when a problem
occurs in the power supply
(suspension of power supply due to
lightning, etc.) or due to the trip of a
breaker caused by short circuits in
the power supply, etc.

Solution

Quality check for power supplies used in
semiconductor manufacturing equipment in
accordance with the SEMI guidelines

Measure stability of the voltage of supplied power according to
SEMI S2-0302 (Environmental, Health, and Safety Guideline for
Semiconductor Manufacturing Equipment). If a sag (default:
within 2%) occurs, the wafer is removed from the line for
inspection so daily quality check for power supplies is necessary.

Item
Swe: Swell
Dip: Dip

Decrease of power supply voltage
may cause devices to stop or reset
operations.

Increase of power supply voltage
may cause devices to stop or reset
operations.

Instantaneous power failure may
cause devices to stop or reset
operations. Recently, various
preventive measures have been
taken for computers, thanks to
widespread use of UPS
(uninterruptible power source).

Int: Instantaneous

power failure

Occurrence date

Channel

I: Start 0: End

Power Supply Quality Check at Various Places

SEMI: Semiconductor Equipment and Materials International
SEMI guidelines are used at the time the contract is made, to
evaluate the safety of semiconductor manufacturing equipment
when exporting it from Japan to the USA.

rms value

7

Detection period

Voltage fluctuation image

Normal period Fluctuation period Normal period

Measurement

results

Advantages obtained by using the CW240

●Compact and easy to carry

●Detects voltage fluctuations in each cycle.

Instantaneous power failures and voltage
fluctuations are monitored continuously, and
the occurrence and recovery times are
reported.

Voltage level
(100% as reference)

Fall (rise) time

50% ~

Within 0.2 sec.

Result:

Occurrence date/time of the sag can
be reported so that semiconductor
quality can be improved.

Other:

Verification of instantaneous power failure
preventive measures implemented in
semiconductor manufacturing equipment

70% ~

Within 0.5 sec.

80% ~

Within 10 sec.

90% ~
110%

No limit

~ 120%

Within 0.5 sec.

Convenient

functions

Measures Loads in Four Systems Simultaneously.

The CW240 enables simultaneous measurement of loads in four systems in the case of the
single-phase 2-wire system, and in two systems in the case of the single/three-phase 3-wire
system (common to voltage).
Current clamp probe/range can be set for each system.

This allows measurement according to the current flowing in each load.

(example)

200A

100A

10A

2A

Power
supply

1

N

Load 1

Load 2

Load 3

Load 4

NU1CH1 CH2 CH3 CH4

8

CW240 side Example of single-phase 2-wire system

Reduces Operation Errors at Work Site.

Wiring check function

Prior to start of measurement, the CW240 checks whether wiring is correct. Wiring errors, reverse connection of
current clamps, and phases to be checked can be displayed in a vector diagram.

Checking the
phases displayed in
a vector diagram

OK/NG judgment Measured values

Setting check function

Settings made for data saving can be checked in the screen. This prevents data acquisition errors that may occur due
to mistakes in voltage range setting, current clamp selection or data save item selection.

Phase/range etc.

Data save item

Measurement start/end

To change the settings, press this button to display the setting screen.