Atec cw240 User Manual

Spec Sheet

CW240 Clamp-on Power Meter

Characteristics 1

Electric power analysis and power

supply quality control in a single unit.

Characteristics 2

V Range : 150/300/600/1000Ｖ A Range : Minimum 200.0mA（96036）

Maximum 3000A (96034/35)

Measuring Mode : All items can be measured at the same time

Wiring : 1 phase 2W, 1 phase 3W, 1 phase 3W3i (Neutral line current)

3 phase 3W2i, 3 phase 3W3i (3-wattmeter method), 3 phase 4W,

3 phase 4W4i (Neutral line current) Multiple System Load Measurement :

1 phase 2W X2/ X3/ X4, 1 phase 3W X2, 3 phase 3W X2,

SCOTT Wiring (1 phase 3W +3 phase 3W)

Data Saving : PC Card, Internal Memory (1MB) Data Saving Interval :Standard 1/2/5/10/15/30 sec 1/2/5/10/15/30/60 min

Short time 1 Cycle/0.1/0.2/0.5 sec (Only for Instantaneous Value)

Function : Leak Current

Analog I/O

Wiring & Setting Check

Display Hard Copy, Instantaneous Value Data Saving

Instantaneous Value (Wave form) / Electric Energy /Demand / Harmonics / Voltage Fluctuation

2004.10.18 2nd (MC)

g

pp

g

g.(

g

g.(

g

Input

Item Voltage (V) Input type Resistive potential division Rated Value (Range) 150.0/300.0/600.0/1000V

Phase/Wiring Measurement

1P2W/1P3W/1P3W3i(Nutral line current)/3P3W2i（2-wattmeter method）/3P3W3i（3- wattmeter method),3P4W/3P4W4i(Nutral line current）, SCOTT wiring （1P3W + 3P3W)

2

Current (A)

Clamp detection

96036 (2A) 200.0/500.0mA/1.000/2.000A 96033 (50A) 5.000/10.00/20.00/50.00 A 96030 (200A) 20.00/50.00/100.0/200.0 A 96031 (500A) 50.00/100.0/200.0/500.0 A 96032 (1000A) 200.0/500.0 A/1.000 kA 96034 3000A range 300.0/750.0 A/1.500/3.000 kA 2000A range 200.0/500.0 A/1.000/2.000 kA 　　　 1000A ran 96035 3000A range 300.0/750.0 A/1.500/3.000 kA

　　　　 300A ran

100.0/200.0/500.0 A/1.000 kA

e

30.00/75.00/150.0/300.0 A

e

Number on measurement system

Input resistance

Common Voltage 1P2W: 4 system load/ 1P3W: 2 system load/ 3P3W2i: 2 system load

roximately 1.3MΩ

A

Approximately 100kΩ（CW240）

Maximum allowed 1000Vrms 96036 (2A) 20Arms continuous input 96033 (50A) 130Arms

96030 (200A) 250Arms 96031 (500A) 625Arms 96032 (1000A) 700Arms 96034 3000A range 2400Arms 2000A range 2400Arms 　　　 1000A ran

e

1200Arms

96035 3000A range 3600Arms

e

360Arms

AD conversion

　　　　 300A ran

Simultaneous inversion of Voltage/Current input, PPL synchronism

Measurement function

Method

Parameter Voltage

Frequency range Crest factor Accuracy ±0.2%rdg.±0.1%rng. 96030, 96031, 96033, 96036 ±0.6%rdg.±0.4%rng.

Power factor effects

Effect of reactive factor －

Valid input range

Display Range

Temperature coefficient Display update period

Digital sampling 45Hz to 65Hz　（Select measurement element from U1, U2 or U3) 3 for rated input　(1.8 for 1000 range)

－

5 to 110% for each range （Max 100% for 1000 range） Voltage/Current: 0.4 to 130% for each range （Zero suppress less than 0.4%) Electric Power（Active, Reactive, Apparent）: 0 to 130% for each range （Zero suppress if less than 0.17% of range rating) Harmonics Level: 0 to 130% for each range ±0.03%rn

Approximately 0.5 second

/

℃

Current/Active Power/Reactive Power1（Use reactive-power meter method）

96032, 96034, 96035 ±1.0%rdg.±0.8%rng.

Except 96030

±0.05%rng/

℃

96030 ±1.0%rn

±2.0%rn

96030 ±1.0%rn

±2.0%rn

.（45 to 65Hz，Power factor = ±0.5

45 to 65Hz，Power factor = ±0.5）

.（45 to 65Hz，Power factor = ±0.5

45 to 65Hz，Reactive factor= ±0.5）

rd

: reading 　 rng: range

）

Frequency measurement

Measurement input : Voltage input: Select from U1,U2 and U3 Measurement frequency range : 45 to 65 Hz Display Range : 40.00 to 70.00 Hz

Accuracy : ±0.1%rdg.±1dgt. When sine wave input is 10 to 130% of voltage range

Low-pass filter function : Cutoff frequency : 300Hz / On/Off setting

Electric energy measurement

Measuring element : Active power, Recursive power, Lag reactive power and Lead reactive power

Measurement accuracy : Measurement Accuracy is +/- 1dgt for Active Power & Reactive Power

Measuring range : Active power

(By setting of Range, Consumption 0.00000 mWh to 999999 GWh VT ratio and CT ratio) Regenerative -0.00000 mWh to -999999 GWh

Reactive power

Lag 0.00000 mvarh to 999999 GVarh Lead -0.00000 mvarh to -999999 Gvarh"

Display digit setting function : Auto setting by rated electric energy, Set minimum resolution, Select from minimum resolution

movement by integrated value

Integration time accuracy : ±20ppm(Typ. , 23 ℃）

3

Demand mode

Measurement element : Active Power （consumption）, Reactive Power（Lag）,

Power factor （Demand value within each interval time）, Active electric energy （Consumption, Regenerative）, Reactive electric energy （Lag/Lead）（Electric energy within each interval time）

Max demand (Electric power consumption demand）

value from beginning of logging measurement and its occurrence time

Measurement accuracy : Active power, each measurement accuracy Reactive power = +/- 1 dgt.

Harmonics mode

Method : PLL synchronization

Measurement frequency range : Fundamental wave frequency 45 to 65

Number of analysis order : 1st - 50th

Window width : 1 period

Window function : Rectangular

Number of data analysis : 128 points

Analysis rate : 1 time / every 16 period

Analysis item : Harmonics level: Each harmonic level of Voltage, Current and Electric power

Relative harmonic content : Each relative harmonic content of Voltage, Current and Electric power

Harmonic phase angle: Each harmonic phase angle of Voltage, Current and Electric energy Select fundamental wave for Voltage and Current or select fundamental wave against U1

Total value : Total value up to 50th harmonic of Voltage, Current, Electric energy and Power factor

Total harmonic content : Voltage and Current (THD-F or THD-R)

Accuracy : Harmonics level

Current / Electric Power 1 to 20th : ±1.5%rdg.±1.5%rng. 16th or later order for 96031 21 to 30th : ±2.0%rdg.±1.5%rng. All order for 96032 31 to 50th : ±3.0%rdg.±1.5%rng. Reference value : Relative harmonic content

+/- 2 dgt by computing from the harmonic level

: Harmonic phase angle

Accuracy assurance range is more than 5% of the range for both harmonic voltage of each

order and current level

1to 20th order：±5° 20 to 50th order: +/-20 （0.3°×k+1°） k： order

Display data : List, Bar graph (linear or log) and Vector

4

Waveform measurement function

Measurement elements : Voltage/Current waveform at inphase, All voltage waveform, Select from all current waveform

Change of magnification : 1/3 to 20 times against the rating

Display data : 1 waveform

Voltage fluctuation measurement function

Measurement elements : Voltage Dip/Voltage Swell/Voltage failure

Measurement method : Detect from voltage RMS value of 1 waveform

Threshold value/ Hysteresis : Set % against to reference voltage

Accuracy : Same as voltage RMS accuracy

Detection period : Period that exceeded threshold value

Display data : Data, Time, Voltage RMS value and detection period

number of event : 100

Display function

Display : 5.7 inches STN monochrome LCD (320 x 240 pixels) with backlight

Backlight : Auto off, ON/OFF

Contrast : Automatic compensation and 8 level setting by ambient temperature

Display digits : Except electric power: 4 digits

Electric energy: 6 digits

Languages : English/French/German/Italian/Spanish/Korean/Japanese

French,German,Italian,Spanish and Korean languages will be added soon. Averaging function : Moving average method/ select from 2/5/10/20 times

Display hold function : Hold/Release

Save and Print function

Manually or Automatically save/print

Memory : Internal memory: 1MB or PC card

Print : Dedicated printer (RS-232 )

Save and print data : All measurement item, /Set value/Screen

Save and print interval : Standard interval: 1/2/5/10/15/30sec. /1/2/5/10/15/30/60min.

Less than 30 second interval, it impossible to output/print for harmonics measurement and waveform data.

Short time interval:

0.1/0.2/0.5second for each waveform

Data output item is only instantaneous value

Possible for data saving time display : Compute from free area of storage, data saved item and interval time

5

File operation

File copy : File copy from internal memory to PC card

Read set file/ Save : Internal memory/ Reading of set file in the PC card/ Save

Deletion of file : Delete internal set file/ Delete file in PC card

Format : PC card/ Initialize internal memory

File saving format : Measurement data: CSV format (Binary format when set to short time interval

Waveform data : Binary format

Display data : BMP format

Setting data : text format

Voltage dip/Swell/Data for instantaneous power failure : Text format

Communication function

Electric specification : EIA RS-232

Synchronism method : Start-Stop synchronism method

Baud rate : 1200/2400/9600/19200/38400 bps

Connector : D-SUB 9 pin

PC card interface

Slot : Conforms with PC Card Standard TYPE Ⅱ×1

PC card : Flush ATA card

Data format : MS-DOS format

Recording contents : Setting data/Measurement data/Display data

External control output

Input-output for start/stop control of integrated power measurement

Control input : TTL level or contact

Control output : TTL level

Analog input-output function (Optional)

Analog output

Output voltage : ±1VDC for rated value of each range Electric energy by output rate Can be set magnification of 10/100 for harmonics Frequency (0.4 to 0.7V)/ (40 to70Hz)

Number of output : 4CH

Output data : Instantaneous value

(Select 4 items) Voltage/Current/Ave. Voltage/Ave. Current/Active power/Reactive power/Apparent power/Power

factor/Phase angle/Frequency

Electric power

Active electric energy （Consumption/Regenerative）/ Reactive electric energy (Lag/Lead)

Harmonic

Harmonics level for each order/ Relative harmonic content of each order/ Relative harmonic phase angle/

Total value/ THD-F/THD-R

Accuracy : ±（Measurement accuracy +0.2%f.s.)

Resolution : Polarity + 11 bits

Updating of cycle : Except harmonic measurement: 1 cycle of input signal

Harmonic measurement elements: 16 cycle of input signal Temperature coefficient : less than ±0.02%f.s./℃

Output resistance : 22 Ω ±5% Electric energy output rate : Select from 1V/1kWh，1V/5kWh，1V/10kWh，1V/50kWh，1V/100kWh，1V/500kWh，

1V/1000kWh

6

Analog input

Input range : 100mV/1V/5VDC

Number of input : 2CH

Accuracy : ±0.5% f.s.

Resolution : Polarity + 11 bits

Sampling rate : About 20m sec.

Input resistance : About 100k Ω

Clock function

Auto calendar/Leap year auto detection/24 hour clock Actual time accuracy : ±20ppm（Typ. , 23 ℃）

Wiring error check function

Voltage/Current input value, Voltage/Current phase difference, Check rightness of frequency measurement

Check single phase load connection for SCOTT wiring

Wiring diagram, Vector diagram display

Setting confirmation display

Data saving item at integrated power measurement

Other function

VT/CT ratio setting/ID number setting/NiMH battery charging/Battery power display/Beep sound (Confirmation of key

operation)/Key lock/System reset

General Specification

Environmental requirements : Indoor usage at an altitude of 2,000 meters or less Storage temperature and humidity ranges : -20 to 60 ℃, 90 %RH (no condensation) Usage temperature and humidity ranges : 5 to 40℃，5 to 80%RH （no condensation）

Insulating resistance : DC500V 50M Ω or greater

Between voltage input terminals and case

Between voltage input terminals and current input terminals/ Terminal for DC

power/ Between external interface terminals

Withstand voltage : AC5.55 kVrms/1 min （sensed current 1mA）（50/60Hz, 1 minute） Between voltage input terminal and main unit case AC3.32 kVrms/1 minute （sensed current 1mA）

Between Voltage input terminal to Current input terminal, DC power supply

terminal and External interface terminal

Power supply : AC adapter 100 to 240V 50/60Hz Alternative power supply : NiMH battery （Sell separately）

Battery: AA size alkaline battery X 6 (batteries included)

MAX rated apparent power : Main unit: About 10W (Normal operation)/ About 20W (In case of charging NiMH AC adapter： About 30VA（with normal operation）, About 60VA（when charging NiMH） Size : About 206(W)×184(H)×65(D)mm（not including prong） Weight : About 1.2kg（without batteries）

7

Accuracy assurance condition

Warm up time : more than 30 minutes / Valid input range, Sine wave input and Power factor = 1 (with PPL synchronization) Accuracy assurance temperature & RH range : 23±5 ℃ 30 to 75%Rh

Accuracy assurance frequency range : 45 to 65Hz

Accuracy warranty period : 1 year

Accessories (supplied with purchase of the main unit)

91007 Voltage probes (Black, Red, Yellow and Blue 1 cable each/ cable length is 3m)

AC adapter x 1

AA size alkaline battery x 6 ToolBox240・・・CD-ROM

User's Manual x 1, CD-ROM x 1

Quick manual x 1, CD-ROM x 1

Communication function manual (CD-ROM) x 1

∑

Computing equation

Active power, Reactive power, Apparent power, Power factor and Phase angle (for phase angle, measured value for each phase)

Average value during the integration measurement, Max value and Min value

Voltage RMS value

rmsU

Current RMS value

rmsI

Active power

1

P

T

Reactive power 1

When using reactive watt meter method

Q

T

1P3W 3P3W *6

Ave. Voltage U ave. (U1+U2)/2 (U1+U2+U3)/3 *1 Ave. Current I ave. (I1+I2)/2 (I1+I2+I3)/3 *2 Active power ∑P P1+P2 P1+P3 P1+P2+P3 *4 Reactive

∑Q Q1+Q2 Q1+Q2+Q3 *4

power 2 *3

T

1

T

1

T

{}{}

∫

0

T

1

⎧ ⎨

∫

⎩

0

2

dttu

)(

mm

∫

0

T

2

==

dtti

)(

mm

∫

0

dttitu

)()(

mmm

+×=

titu

()(

mmm

T

1

==

∑

T

t

T

1

∑

T

=

0

t

T

1

∑

T

=

t

T

⎫

dt

)

⎬

4

⎭

2

tu

)(

m

=

0

2

ti

)(

m

×=×=

titu

)()(

0

T

mm

T

1

⎧ ⎨

∑

⎩

=

0

t

T

⎫

+×=

titu

)

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mm

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4

⎭

2-wattmeter method

22

PSQ −=

u(t)：Input signal for voltage i(t)：Input value for Current T：Input signal for 1 cycle m：Phase

3P3W

3-wattmeter method

22

PS ∑−∑

8

3P4W

Apparent power

Phase angle *5 ∑PA

S=U×I ∑S S1+S2 S1+S2+S3 *4

No use of reactive

∑PF Power factor

wattmeter method *5

Use reactive wattmeter

∑PF

method

3

()

31

SS +

2

PF

P

=∑

S

∑

P

∑

=∑

cos

22

QP

∑+∑

−1

PFPA ∑=∑

Note : For distortion wave input: There may be discrepancies between the CW240 and other instruments that operate based on

other measurement principals.

*1 : Line voltage for 3P3W / Phase voltage for 3P4W

*2 : Result of I2 will be derived from vector computation when using 3P3W (2 wattmeter method)

*3 : Case of not using reactive watt meter method. In this case, do computation for each phase by multiply polarity of Q at

reactive power meter method.

*4 : Case of using 3P3W, voltage that apply for calculating each phase electric power is the phase voltage from virtual

midpoint.

*5 : Computation for each phase by multiply polarity of Q at reactive power meter method.

*6 : Case of unbalance input at 3P3W (2 wattmeter method), there may be discrepancies between CW240 and other

instruments that operated based on other measurement principals.

P1,P3,Q1,Q3,S1,S3,PF1 and PF3 are value for computing process of 2 wattmeter method, and that value have no

physical meaning.

9

Data Memory

All general measurement data items，Electric energy/Demand measurement，Voltage fluctuation measurement

in case of saving data. Phase/wiring

Measurement

Number of data items 168 196 114 208 138 142 216

Memory Interval

PC card (64MB)

Internal memory(1MB)

All general measurement data items，Electric energy/Demand measurement, Harmonics measurement data(all)，

Waveform measurement data，Voltage fluctuation measurement in case of saving data.

Phase/wiring Measurement 1P2W

Number of data items 5624 5052 3758 6888 4390 5002 7504

1s 9hours 8hours 14hours 8hours 12hours 12hours 7hours

1min 24days 21days 37days 20days 30days 30days 19days

60min 1471days 1304days 2223days 1232days 1852days 1802days 1188days

1s 8min 7min 12min 7min 10min 10min 6min

1min 8hours 7hours 12hours 7hours 10hours 10hours 6hours

60min 21days 18days 32days 17days 26days 26days 17days

1P2W /4system load

/4system load

1P3W /2system load

1P3W 3i

1P3W3i 3P3W2i

3P3W2i/ 2system load

/2system load

3P3W3i, 3P4W

3P4W 4i

3P4W4i SCOTT

SCOTT wiring

wiring

Memory Interval

1min 17hours 19hours 26hours 14hours 22hours 19hours 13hours PC card

(64MB)

memory(1MB)

General measurement data items, Frequency measurement，Voltage fluctuation measurement in case of saving

data. Phase/wiring Measurement 1P2W

Number of data items 28 22 15 25 16 17 27

Memory Interval

PC card (64MB)

Internal memory(1MB)

Subject change without notice.

60min 44days 49days 65days 35days 56days 49days 32days

1min 12min 13min 19min 8min 16min 13min 7min Internal

60min 12hours 13hours 19hours 8hours 16hours 13hours 7hours

1P3W /4system load

1cycle 2hours 3hours 3hours 2hours 3hours 3hours 2hours

100ms 12hours 15hours 19hours 13hours 18hours 18hours 12hours

200ms 25hours 30hours 39hours 27hours 37hours 36hours 25hours

500ms 62hours 75hours 98hours 68hours 94hours 90hours 64hours

1cycle 1min 2min 3min 1min 2min 2min 1min

100ms 10min 12min 16min 11min 16min 15min 10min

200ms 21min 25min 34min 23min 32min 31min 22min

500ms 54min 65min 85min 59min 82min 78min 55min

/2system

load

1P3W3i 3P3W2i

/2system load

3P3W3i, 3P4W

3P4W4i SCOTT

wiring

Atec cw240 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual