電流検出器 - コーンズテクノロジー株式会社 · 2019-01-30 · the droop rate will...

ピアソン社（米国）製

広帯域・精密・大電流電流検出器（カレント･モニター）

（ホームページ http://www.cornestech.co.jp/）商品のお問合せ、資料のご請求は下記までどうぞ電子通信ソリューション営業部

東京 105-0014 東京都港区芝 3-5-1 コーンズハウス TEL:03-5427-7566 FAX:03-5427-7572

大阪 550-0005 大阪府大阪市西区西本町 1-13-40 アイデム西本町第２ビル TEL:06-6532-1012 FAX:06-6532-7749

PEARSON ELECTRONICS, INC.

Selecting a Pearson Current Monitor

Obtain a copy of the specification sheet thatlists the standard and special order current

monitors. These monitors are able to measurepulses, transients and continuous signals. Theydo not measure steady-state dc current.

The first four columns of the specificationsheet give model number, output sensitivity

and physical dimension information. The nextfour columns list the specs which apply tomeasuring pulses, and are referred to as timedomain parameters. The final four columns listthe specs which apply to measuring continuoussine-wave currents and are referred to asfrequency domain parameters.

Determine if the application is to measurea pulse or continuous signal. If the signal is

more complex, and rms, peak, dc or otherlimiting values are hard to determine, refer toPearson Electronics Application Notes, or callour engineering department.

Pulse Signals

If single pulse, determine the approximatemaximum peak current (amps) and theapproximate maximum pulse length (seconds).

Compute the current-time product (amp-seconds).To use a given model, both the maximum currentand the current-time product should not exceedthe spec sheet values.

If repetitive pulses are to be measured, consultthe Pearson Application Notes to be sure that theaverage dc level (zero frequency component) doesnot exceed the maximum allowable for that model.

If the rise-time of the signal pulse is known, itshould be compared to the spec sheet value. Themonitor should not be used for pulses that have arise-time shorter than the value listed.

For a rectangular pulse the deviation from aperfectly flat top is given by the droop rate.Multiplying the pulse length (in microseconds) bythe droop rate will yield the percentage deviationfrom the flat-top value at the end of the pulse.

Continuous Signals

Determine the approximate maximum sine-waveamplitude, I (amps), and the approximateminimum frequency, f (Hz).

Compute I/f (amps/Hz). To use a given model,this should not exceed the spec sheet value.

Compute the maximum rms current. To use agiven model, this should not exceed the specsheet value.

Determine if the frequency over which themonitor is to be used is within the range of thelow and high 3 dB points. The accuracy of themonitor will decrease outside of this range.

If there are several monitors that satisfy theabove criteria, a selection based on voltage

output (sensitivity) and size can now be made. Inthe third column is given the output volts perprimary amp to be measured. For example, a1 milliamp signal will produce a 1 millivolt outputfor a monitor that has a 1 volt/amp output.

An often asked question concernsterminating the output of the monitor with a

resistor. Since the monitor can be modeled as avoltage source in series with 50 Ohms, theaddition of an external terminating resistance willdecrease the output of the unit. For example, a50 Ohm external termination would reduce theoutput to one-half.

1

3

2

4

5

© 1991 Pearson Electronics, Inc.

Pearson Electronics, Inc. • 4009 Transport Street • Palo Alto, CA 94303Telephone 650-494-6444 • FAX 650-494-6716 • Web: www.pearsonelectronics.com

出力中心穴（V/A）直径最大ピークドループ使用可能最大IT値最大RMS I/f

±1%以内（インチ）電流立上り時間（A・秒）電流（ピークA/Hz) *1 （A）（ナノ秒）（A）低高

（Hz）（MHz）0.01 2.1 50,000 0.1 100 2.5 200 0.25 4 12

%/mSec0.1 2.1 5,000 0.8 20 0.5 65 1 20 1.5

%/mSec0.1 2.1 10,000 0.8 20 0.5 65 1 20 1.5

%/mSec0.5 2.1 1,000 20 20 0.02 15 40 20 0.07

%/mSec0.025 2.1 20,000 0.1 100 0.5 100 160 4 3

%/μSec0.1 10.75 5,000 0.25 50 0.7 120 400 7 4.4

%/μSec0.005 3.5 200,000 2 250 25 750 3 1.5 150

%/mSec0.005 3.5 100,000 1 250 65 1400 0.9 1.5 400

%/mSec0.001 3.5 500,000 0.7 300 75 2500 1 1.2 450

%/mSec1 2.1 500 0.08 20 0.005 7.5 125 20 0.017

%/μSec0.001 4.75 500,000 0.09 2000 1200 2500 0.15 0.2 7500

%/mSec1 0.25 100 0.2 2 0.0004 2.5 300 200 0.0025

%/μSec0.1 0.25 400 0.02 5 0.004 10 30 70 0.025

%/μSec0.01 0.25 2,000 2 20 0.04 25 3 20 0.25

%/mSec0.01 3.5 50,000 3 200 22 400 5 2 140

%/mSec0.025 3.5 20,000 4 100 3 325 7 4 20

%/mSec0.1 3.5 5,000 20 40 0.6 140 40 10 3.6

%/mSec1 3.5 500 40 50 0.03 *3 12 40 7 0.1

%/mSec0.25 3.5 2,000 0.1 30 0.09 60 160 10 0.6

%/μSec0.1 1 5,000 1 20 0.2 50 1 20 0.6

%/mSec

モデル

時間領域特性周波数領域特性

3dBポイント

1025

1010 *2

1080 *2

1330 *2

101

110

110A

150

2877

2878

2879

301X *2

1423 *2

2100

2093 *2

3972

3025 *2

310 *2

3100 *2

325 *2

標準タイプ電流モニター


±1%以内（インチ）電流立上り時間（A・秒）電流（ピークA/Hz) *1 （A）（ナノ秒）（A）低高

（Hz）（MHz）

モデル

時間領域特性周波数領域特性

3dBポイント

標準タイプ電流モニター

0.1 0.5 5,000 0.06 20 0.25 50 120 20 1.7%/mSec

0.1 0.5 5,000 0.9 20 0.2 50 1 20 0.6%/mSec

1 0.5 500 0.09 10 0.002 5 140 35 0.006%/μSec

0.001 2 200,000 0.05 200 6.0 400 0.7 2 40%/mSec

0.01 2.1 20,000 0.3 25 1.0 150 0.5 15 3.5%/mSec

0.01 0.5 25,000 0.3 20 0.5 100 0.5 20 3%/mSec

1 2 500 0.3 1.5 0.002 10 400 200 0.008%/μSec

0.5 2 1,000 0.1 2.5 0.008 20 100 150 0.03%/μSec

0.1 2 2,000 15 3.5 0.04 40 30 120 0.12%/mSec

1 3.5 500 0.14 3.5 0.01 10 200 120 0.04%/μSec

*1 負荷インピーダンス1MΩ//20pFにおける第１パルス波に対する応答。 50Ω終端では出力は1/2。

*2 ダブルシールド・モデルで高電圧、雑音の多い環境での使用に向いています。

*3 ２次バイアス電流を印加した場合の値です。

*4 Sensitivity +2/-0%

*5 Sensitivity ±0.5%

*6 Sencitivity ±1.0%

410

411

4100

6595

6600

6656

4418

4997

5046

6585

Rev2


±1%以内（インチ）電流 (%/msec.) 立上り時間（A・秒）電流（ピークA/Hz)*1 （A）（ナノ秒）（A）低高

（Hz）（MHz）110C 0.1 2 5,000 0.004 %/μSec 15 0.5 100 6 25 2.5

2100C 1 2 500 0.3 %/μSec 10 0.005 100 500 35 0.02

3525 0.1 2 5,000 0.004 %/μSec 25 0.5 100 5 15 2.5

4100C 1.0 0.5 500 1 %/μSec 15 0.0015 5 1,500 25 0.008

411C 0.1 0.5 5,0000.015 %/μSec

20 0.15 50 25 20 0.7

4160 0.01 2 50,000 1 %/mSec 200 2.5 300 1.5 2 15

4688 1.0 2 500 0.4 %/μSec 12 0.005 15 600 30 0.03

5008C 0.01 0.5 50,000 10 %/mSec 150 1 150 15 3 4.2

5101 0.5 2 1,000 0.1 %/μSec 20 0.02 25 150 18 0.08

5664 0.001 2 200,000 0.25 %/mSec 250 8 500 0.4 1.5 35

5949 0.5 4 2,000 0.1 %/μSec 30 0.02 30 175 12 0.08

7450 0.01 6 50,000 1 %/mSec 250 3 400 1.5 1.5 12

7655 0.1 6 5,000 7 %/mSec 100 0.4 175 10 4 2

7760 1.0 6 500 0.5 %/μSec 50 0.005 20 750 7 0.03

7790 1.0 1 500 1 %/μSec 15 0.002 5 1,500 25 0.01

7795 0.1 1 5,0000.015 %/μSec

25 0.15 60 25 15 0.8

7800 0.01 1 50,000 3 %/mSec 175 0.8 125 5 2 4

7805 1.0 4 500 0.7 %/μSec 25 0.004 15 1,000 25 0.02

7810 0.1 4 5,000 7 %/mSec 50 0.4 150 10 7 2

7815 0.01 4 50,000 1 %/mSec 200 3 400 1.5 2 15

8585C 1.0 0.5 500 1 %/μSec 2 0.003 5 1,500 200 0.01

8590C 1.0 1 500 0.7% /μSec 2.5 0.002 5 1000 150 0.01

パワーラインリップルディテクタ

モデル仕様PRD-１２０ Max Voltage　120V　ACPRD-２４０ Max Voltage　240V　AC

アッテネータ

モデル仕様A-10 　Voltage　Ratio 10:1 (20dB)

モデル

時間領域特性周波数領域特性3dBポイント

クランプーオンタイプ電流モニター

型名最大パルス電圧（In Oil)

最大パルス電圧（In Air)

分圧比（In Oil)

分圧比（In Air)

周波数範囲（1MΩ負荷）

ドループ%/μSec

VD305A 300KV 50KV 5000:1 - 30Hz - 4MHz 0.02VD305A-Air - 50KV - 5000:1 70Hz - 4MHz 0.05

参考資料

1) Droop Rate 2) Frequency Response 3) Rise Time 4) Bias 5) CT Test data Sample

分圧器

PEARSON ELECTRONICS, INC.Standard Current Monitors

PEARSON ELECTRONICS, INC.4009 Transport Street, Palo Alto, California 94303 U.S.A.Telephone 650-494-6444 • FAX 650-494-6716 • Web site: www.pearsonelectronics.com

Figure A Figure C Figure D Figure E Figure FThickness: 13⁄4” Thickness: 23⁄4” Thickness: 1” Thickness:1” Thickness: 5⁄8”Connector: UHF Connector: UHF Connector: BNC Connector: BNC Connector:SMA

STANDARD CURRENT MONITORSAccuracy +1%, -0% initial pulse response for all models, with a high impedance load such as 1 megohm in parallel with 20 pF. A 50 ohmtermination will reduce the output to half. Those labeled * are double shielded and are recommended for high voltage or high noise environ-ments. The entries labeled ** may need a small dc bias current through the secondary for maximum current-time rating.†Type N Connector

Maximum Useable Maximum Approx. 3dB pt. I/fModel Output Hole Dia. Peak Curr. Droop Rise Time IT Max. RMS Curr. Low High (peak amps/Number Figure (volts/amp) (inches) (amps) (%/microsec.) (nanosec.) (amp-sec.) (amps) (Hz) (MHz) Hz)

TIME DOMAIN PARAMETERS FREQUENCY DOMAIN PARAMETERS

2877 F 1.0 0.25 100 0.2 2 0.0004** 2.5 300 200 0.0025

4100 E 1.0 0.5 500 0.09 10 0.002** 5 140 35 0.006

2100 D 1.0 2.0 500 0.08 20 0.005** 7.5 125 20 0.017

3100* C 1.0 3.5 500 0.04 50 0.03** 12 40 7 0.1

150 D 0.5 2.0 1,000 0.02 20 0.02** 15 40 20 0.07

325* C 0.25 3.5 2,000 0.1 30 0.09 60 160 10 0.6

2878 F 0.1 0.25 400 0.02 5 0.004** 10 30 70 0.025

410 E 0.1 0.5 5,000 0.06 20 0.25 50 120 20 1.7

411 E 0.1 0.5 5,000 0.0009 20 0.2** 50 1 20 0.6

110 D 0.1 2.0 5,000 0.0008 20 0.5** 65 1 20 1.5

110A† D 0.1 2.0 10,000 0.0008 20 0.5** 65 1 20 1.5

310* C 0.1 3.5 5,000 0.02 40 0.6 140 40 10 3.6

1010* A 0.1 10.75 5,000 0.25 50 0.7** 120 400 7 4.4

1025 D 0.025 2.0 20,000 0.1 100 0.5 100 160 4 3.0

3025* C 0.025 3.5 20,000 0.004 100 3.0 325 7 4 20.0

2879 F 0.01 0.25 2,000 0.002 20 0.04** 25 3 20 0.25

5046 E 0.01 0.5 25,000 0.0003 20 0.5** 100 0.5 20 3.0

101 D 0.01 2.0 50,000 0.0001 100 2.5** 200 0.25 4 12.0

4997 D 0.01 2.0 20,000 0.0003 20 1.0** 150 0.5 20 3.5

301X* C 0.01 3.5 50,000 0.003 200 22.0 400 5 2 140.0

(continued)

STANDARD CURRENT MONITORSThe accuracy of these current monitors is ± 1%, with a high impedance load such as 1 megohm in parallel with 20 pF. With the exceptionof the 2093, which has a 1 ohm output impedance, a 50 ohm termination will reduce the output to half. Those labeled * are double shieldedand are recommended for high voltage or noise environments. The entries labeled ** may need a small dc bias current through thesecondary for maximum current-time rating. †Type N connector

PEARSON ELECTRONICS, INC.Standard Current Monitors & Capacitive Voltage Dividers

1080* C† 0.005 3.5 200,000 2.0 0.25 25 750 3.0 1.5 150

1330* C 0.005 3.5 100,000 1.0 0.25 65 1400 0.9 1.5 400

4418 D 0.001 2.0 200,000 0.05 0.2 6.0** 400 0.7 2 40

1423* C 0.001 3.5 500,000 0.7 0.3 75 2500 1.0 1.2 450

2093* B 0.001 4.75 500,000 0.09 2.0 1200 2500 0.15 0.2 7500

Maximum Useable Maximum Approx. 3dB pt. I/fModel Output Hole Dia. Peak Curr. Droop Rise Time IT Max. RMS Curr. Low High (peak amps/Number Figure (volts/amp) (inches) (amps) (%/millisec.) (microsec.) (amp-sec.) (amps) (Hz) (MHz) Hz)


Figure B Figure C Figure D Figure G Figure HThickness: 4” Thickness: 23⁄4” Thickness: 1”Connector: UHF Connector: UHF Connector: BNC

ATTENUATOR MODEL A10The Model A10 attenuator may be used with all standard Pearson Current Monitors, except Model 2093, to reduce signal output voltage bya factor of 10. All maximum ratings of these models are preserved. The attenuator is symmetrical and can be used in either direction.

Voltage ratio ........................ 10:1 (-20 dB)Midband accuracy .............. ±1%Input/Output resistance ...... 50 Ohms

Maximum peak voltage .... 500 VoltsMaximum RMS Voltage .... 7.5 VoltsUseable rise time ............. 5 nanoseconds

PEARSON ELECTRONICS, INC.4009 Transport Street, Palo Alto, California 94303 U.S.A.Telephone 650-494-6444 • FAX 650-494-6716 • Web site: www.pearsonelectronics.com © 1998 Pearson Electronics, Inc.

We welcome inquires regarding your specific current monitor needs should none of the standard models meet your requirements.

±1 dB bandwidth .............. DC to 100MHzConnectors ....................... BNC

CAPACITIVE VOLTAGE DIVIDERSAccuracy: Nameplate division ratio measured at 35 degrees C and temperature compensated to within± 1% for 20 degrees C to 80 degrees C. Accuracy is ± 5% with 25 feet of RG-58 cable on the output.

Maximum Voltage Typical UseableModel Pulse Voltage Division Capacitance Droop Rise TimeNumber Figure in Oil (kV) Ratio Added to Circuit (%/microsec.) (nanosec.)

VD-305A H 300 5,000:1 18pF 0.02 100

VD-500A G 500 10,000:1 38pF 0.01 200

Custom Calibration for other ratios or use in air is available.Immersion in clean transformer oil is necessary for measuring highpulse voltages.Droop values given above assume a one megohm cable termination.

Cable termination—typical oscilloscope input (one megohmand 20 pF in parallel).Output Connector—BNC.

HIGH VOLTAGE PULSE TRANSFORMERSPearson Electronics also specializes in the design of high voltage pulse transformers. These transformers employ open construction, andare intended to be immersed in high voltage insulating oil. Pulse output voltages range from 100kV to 500kV with pulse lengths from 0.25 to50 µ-secs. We welcome inquires regarding your specific pulse transformer requirements.

Pearson Electronics, Inc. • 4009 Transport Street • Palo Alto, CA 94303Telephone 650-494-6444 • FAX 650-494-6716 • www.pearsonelectronics.com


PEARSONTM

CURRENTMONITORMODEL 101

Sensitivity 0.01 Volt/Ampere +1/-0%Output resistance 50 OhmsMaximum peak current 50000 AmperesMaximum rms current 200 AmperesDroop rate 0.1 %/millisecondUseable rise time 100 nanosecondsCurrent time product 2.5 Ampere-second maximum*Low frequency 3dB cut-off 0.25 Hz (approximate)High frequency 3dB cut-off 4 MHz (approximate)I/f figure 12 peak Amperes/HzOutput connector BNC (UG-290A/U)Operating temperature 0 to 65 oCWeight 23 ounces

* Maximum current-time product can be obtained by usingcore-reset bias as described in the Application Notes.0.8 Ampere-second is typical without bias.

© 1999 Pearson Electronics, Inc. 101.SPX_990506



PEARSONTM


Sensitivity 0.1 Volt/Ampere +1/-0%Output resistance 50 OhmsMaximum peak current 5000 AmperesMaximum rms current 65 AmperesDroop rate 0.8 %/millisecondUseable rise time 20 nanosecondsCurrent time product 0.5 Ampere-second max.*Low frequency 3dB cut-off 1 Hz (approximate)High frequency 3dB cut-off 20 MHz (approximate)I/f figure 1.5 peak Amperes/HzOutput connector BNC (UG-290A/U)Operating temperature 0 to 65 oCWeight 22 ounces


© 1999 Pearson Electronics, Inc. 110.SPX-990506



PEARSONTM

CURRENTMONITORMODEL 110A

Sensitivity 0.1 Volt/Ampere +1/-0%Output resistance 50 OhmsMaximum peak current 10000 AmperesMaximum rms current 65 AmperesDroop rate 0.8 %/millisecondUseable rise time 20 nanosecondsCurrent time product 0.5 Ampere-second maximum*Low frequency 3dB cut-off 1 Hz (approximate)High frequency 3dB cut-off 20 MHz (approximate)I/f figure 1.5 peak Amperes/HzOutput connector Type NOperating temperature 0 to 65 oCWeight 22 ounces


© 2000 Pearson Electronics, Inc. 110A.SPX_000801



PEARSONTM


Sensitivity 0.5 Volt/Ampere ±1%Output resistance 50 OhmsMaximum peak current 1,000 AmperesMaximum rms current 15 AmperesDroop rate 0.02 %/microsecondUseable rise time 20 nanosecondsCurrent time product 0.02 Ampere-second max*Low frequency 3dB cut-off 40 Hz (approximate)High frequency 3dB cut-off 20 MHz (approximate)I/f figure 0.07 peak Amperes/HzOutput connector BNC (UG-290)Operating temperature 0 to 65 oCWeight 23 ounces


© 2001 Pearson Electronics, Inc. 150.wpd_010718



PEARSONTM


Sensitivity 0.025 Volt/Ampere +1/-0%Output resistance 50 OhmsMaximum peak current 20,000 AmperesMaximum rms current 100 AmperesDroop rate 0.1 %/microsecondUseable rise time 100 nanosecondsCurrent time product 0.5 Ampere-second max.Low frequency 3dB cut-off 160 Hz (approximate)High frequency 3dB cut-off 4 MHz (approximate)I/f figure 3.0 peak Amperes/HzOutput connector BNC (UG-290A/U)Operating temperature 0 to 65 oCWeight 16 ounces




PEARSONTM


Sensitivity 0.1 Volt/Ampere +1/-0%Output resistance 50 OhmMaximum peak current 5,000 AmperesMaximum rms current 120 AmperesDroop rate 0.25 %/microsecondUseable rise time 50 nanosecondsCurrent time product 0.7 Ampere-second*Low frequency 3dB cut-off 400 Hz (approximate)High frequency 3dB cut-off 7 MHz (approximate)I/f figure 4.4 peak Amperes/HzOutput connector UHF (SO-239)Shielding DoubleOperating temperature 0 to 65 oCWeight 12.5 pounds





PEARSONTM


Sensitivity 0.005 Volt/Ampere +1/-0%Output resistance 50 OhmsMaximum peak current 200,000 AmperesMaximum rms current 750 AmperesDroop rate 2.0 %/millisecondUseable rise time 0.25 microsecondsCurrent time product 25 Ampere-secondLow frequency 3dB cut-off 3 Hz (approximate)High frequency 3dB cut-off 1.5 MHz (approximate)I/f figure 150 peak Amperes/HzShielding DoubleOutput connector Type "N"Operating temperature 0 to 65 oCWeight 17.3 pounds




PEARSONTM


Sensitivity 0.005 Volt/Ampere +1/-0%Output resistance 50 OhmsMaximum peak current 100,000 AmperesMaximum rms current 1,400 AmperesDroop rate 1.0 %/millisecondUseable rise time 0.25 microsecondsCurrent time product 65 Ampere-secondLow frequency 3dB cut-off 0.9 Hz (approximate)High frequency 3dB cut-off 1.5 MHz (approximate)I/f figure 400 peak Amperes/HzOutput connector UHF (SO-239)Shielding DoubleOperating temperature 0 to 65 oCWeight 17.7 pounds



PEARSONTM

CURRENT

MONITOR

MODEL 1423

Sensitivity 0.001 Volt/Ampere +1/-0%

Output resistance 50 Ohms

Maximum peak current 500,000 Amperes

Maximum rms current 2500 Amperes

Droop rate 0.7 %/millisecond

Useable rise time 0.4 microseconds

Current time product 75 Ampere-second

Low frequency 3dB cut-off 1.0 Hz (approximate)

High frequency 3dB cut-off 1.2 MHz (approximate)

I/f figure 450 peak Amperes/Hz

Output connector UHF (SO-239)

Shielding Double

Operating temperature 0 to 65 oC

Weight 17.7 pounds

© 2005 Pearson Electronics, Inc. 1423.wpd 050720




PEARSONTM


Sensitivity 1.0 Volt/Ampere +1/-0%Output resistance 50 OhmsMaximum peak current 500 AmperesMaximum rms current 7.5 AmperesDroop rate 0.08 %/microsecondUseable rise time 20 nanosecondsCurrent time product 0.005 Ampere-second maximum*Low frequency 3dB cut-off 125 Hz (approximate)High frequency 3dB cut-off 20 MHz (approximate)I/f figure 0.017 peak Amperes/HzOutput connector BNC (UG-290A/U)Operating temperature 0 to 65 oCWeight 21 ounces



Pearson Electronics, Inc. • 4009 Transport Street• Palo Alto, CA 94303Telephone 650-494-6444 • FAX 650-494-6716 • www.pearsonelectronics.com


PEARSONTM


Sensitivity 0.001 Volt/Ampere +1/-0%Output resistance 1 OhmMaximum peak current 500,000 AmperesMaximum rms current 2,500 AmperesDroop rate 0.09 %/millisecondUseable rise time 2.0 microsecondsCurrent time product 1,200 Ampere-secondLow frequency 3dB cut-off 0.15 Hz (approximate)High frequency 3dB cut-off 200 kHz (approximate)I/f figure 7,500 peak Amperes/HzOutput connector UHF (SO-239)Shielding DoubleOperating temperature 0 to 65 oCWeight 88.5 pounds




PEARSONTM


Sensitivity 1 Volt/Ampere +1/-0%Output resistance 50 OhmsMaximum peak current 100 AmperesMaximum rms current 2.5 AmperesDroop rate 0.2 %/microsecondUseable rise time 2 nanosecondsCurrent time product 0.4 milliamp-sec. maximum*Low frequency 3dB point 300 Hz (approximate)High frequency 3dB point 200 MHz (approximate)I/f figure 0.0025 peak Amperes/HzOutput connector SMAOperating temperature 0 to 65 oCWeight 1.15 ounces

* Maximum current-time product can be obtained by usingcore-reset bias as described in the Application Notes.0.14 milliAmpere-second is typical without bias.




PEARSONTM


Sensitivity 0.1 Volt/Ampere +1/-0%Output resistance 50 OhmsMaximum peak current 400 AmperesMaximum rms current 10 AmperesDroop rate 0.02 %/microsecondUseable rise time 5 nanosecondsCurrent time product 4 milliamp-sec. maximum*Low frequency 3dB point 30 Hz (approximate)High frequency 3dB point 70 MHz (approximate)I/f figure 0.025 peak Amperes/HzOutput connector SMAOperating temperature 0 to 65 oCWeight 1.15 ounces

* Maximum current-time product can be obtained by usingcore-reset bias as described in the Application Notes.1.4 milliAmpere-second is typical without bias.




PEARSONTM


Sensitivity 0.01 Volt/Ampere +1/-0%Output resistance 50 OhmsMaximum peak current 2,000 AmperesMaximum rms current 25 AmperesDroop rate 0.002 %/microsecondUseable rise time 20 nanosecondsCurrent time product 0.04 amp-seconds maximum*Low frequency 3dB point3 Hz (approximate)High frequency 3dB point 20 MHz (approximate)I/f figure 0.25 peak Amperes/HzOutput connector SMAOperating temperature 0 to 65 oCWeight 1.12 ounces





PEARSONTM

CURRENTMONITORMODEL 301X

Sensitivity 0.01 Volt/Ampere +1/-0%Output resistance 50 OhmsMaximum peak current 50,000 AmperesMaximum rms current 400 AmperesDroop rate 3.0 %/millisecondUseable rise time 200 nanosecondsCurrent time product 22 Ampere-secondLow frequency 3dB cut-off 5 Hz (approximate)High frequency 3dB cut-off 2 MHz (approximate)I/f figure 140 peak Amperes/HzShielding DoubleOutput connector UHF (SO-239)Operating temperature 0 to 65 oCWeight 17.5 pounds

© 1999 Pearson Electronics, Inc. 301X.SPX_990506



PEARSONTM


Sensitivity 0.025 Volt/Ampere +1/-0%Output resistance 50 OhmsMaximum peak current 20,000 AmperesMaximum rms current 325 AmperesDroop rate 0.004 %/microsecondUseable rise time 100 nanosecondsCurrent time product 3 Ampere-secondLow frequency 3dB cut-off 7 Hz (approximate)High frequency 3dB cut-off 4 MHz (approximate)I/f figure 20 peak Amperes/HzOutput connector UHF (SO-239)Shielding DoubleOperating temperature 0 to 65 oCWeight 15.8 pounds




PEARSONTM


Sensitivity 0.1 Volt/Ampere +1/-0%Output resistance 50 OhmsMaximum peak current 5,000 AmperesMaximum rms current 140 AmperesDroop rate 0.02 %/microsecondUseable rise time 40 nanosecondsCurrent time product 0.6 Ampere-secondLow frequency 3dB cut-off 40 Hz (approximate)High frequency 3dB cut-off 10 MHz (approximate)I/f figure 3.6 peak Amperes/HzShielding DoubleOutput connector UHF (SO-239)Operating temperature 0 to 65 oCWeight 15.7 pounds




PEARSONTM


Sensitivity 1.0 Volt/Ampere +1/-0%Output resistance 50 OhmsMaximum peak current 500 AmperesMaximum rms current 12 AmperesDroop rate 0.04 %/microsecondUseable rise time 50 nanosecondsCurrent time product 0.03 Ampere-second*Low frequency 3dB cut-off 40 Hz (approximate)High frequency 3dB cut-off 7 MHz (approximate)I/f figure 0.1 peak Amperes/HzShielding DoubleOutput connector UHF (SO-239)Operating temperature 0 to 65 oCWeight 18.1 pounds





PEARSONTM


Sensitivity 0.25 Volt/Ampere +1/-0%Output resistance 50 OhmsMaximum peak current 2,000 AmperesMaximum rms current 60 AmperesDroop rate 0.1 %/microsecondUseable rise time 30 nanosecondsCurrent time product 0.09 Ampere-secondLow frequency 3dB cut-off 160 Hz (approximate)High frequency 3dB cut-off 10 MHz (approximate)I/f figure 0.6 peak Amperes/HzOutput connector UHF (SO-239)Shielding DoubleOperating temperature 0 to 65 oCWeight 15.4 pounds




PEARSONTM


Sensitivity 0.1 Volt/Ampere ±1%

Output resistance 50 Ohms

Maximum peak current 5,000 Amperes

Maximum rms current 50 Amperes

Droop rate 1.0 %/millisecond

Useable rise time 20 nanoseconds

Current time product 0.2 Ampere-second maximum*

Low frequency 3dB point 1 Hz (typical)

High frequency 3dB point 20 MHz (typical)

I/f figure 0.6 peak Amperes/Hz

Output connector BNC (UG-290A/U)





PEARSONTM


Sensitivity 0.1 Volt/Ampere +1/-0%Output resistance 50 OhmsMaximum peak current 5,000 AmperesMaximum rms current 50 AmperesDroop rate 0.06 %/microsecondUseable rise time 20 nanosecondsCurrent time product 0.25 Ampere-second maximumLow frequency 3dB point 120 Hz (approximate)High frequency 3dB point 20 MHz (approximate)I/f figure 1.7 peak Amperes/HzOutput connector BNC (UG-290A/U)Operating temperature 0 to 65 oCWeight 8.7 ounces




PEARSONTM


Sensitivity 0.1 Volt/Ampere +1/-0%Output resistance 50 OhmsMaximum peak current 5000 AMaximum rms current 75 ADroop rate 0.9 %/millisecondUseable rise time 20 nanosecondsCurrent time product 0.2 Ampere-second max*Low frequency 3dB point 1 Hz (approximate)High frequency 3dB point 20 MHz (approximate)I/f figure 0.6 peak Amperes/HzOutput connector BNC (UG-290A/U)Operating temperature 0 to 65 oCWeight 8.3 ounces


© 2002 Pearson Electronics, Inc. 411.wpd-021011



PEARSONTM


Sensitivity 1 Volt/Ampere +1/-0%Output resistance 50 OhmsMaximum peak current 500 AmperesMaximum rms current 5 AmperesDroop rate 0.09 %/microsecondUseable rise time 10 nanosecondsCurrent time product 0.002 Amp-second max*Low frequency 3dB point 140 Hz (approximate)High frequency 3dB point 35 MHz (approximate)I/f figure 0.006 peak Amperes/HzOutput connector BNC (UG-290A/U)Operating temperature 0 to 65 oCWeight 8.0 ounces





PEARSONTM


Sensitivity 0.001 Volt/Ampere ±1%Output resistance 50 OhmsMaximum peak current 200,000 AmperesMaximum rms current 400 AmperesDroop rate 0.05 %/millisecondUseable rise time 200 nanosecondsCurrent time product 6 Ampere-second maximum*Low frequency 3dB cut-off 0.7 Hz (approximate)High frequency 3dB cut-off 2 MHz (approximate)I/f figure 40 peak Amperes/HzOutput connector BNC (UG-290A/U)Operating temperature 0 to 65 oCWeight 22 ounces

* Maximum current-time product can be obtained by usingcore-reset bias as described in the Application Notes. 2 Ampere-second is typical without bias.




PEARSONTM


Sensitivity 0.01 Volt/Ampere ±1%Output resistance 50 OhmsMaximum peak current 20,000 AmperesMaximum rms current 150 AmperesDroop rate 0.3 %/millisecondUseable rise time 25 nanosecondsCurrent time product 1.0 Ampere-second maximum*Low frequency 3dB cut-off 0.5 Hz (approximate)High frequency 3dB cut-off 15 MHz (approximate)I/f figure 3.5 peak Amperes/HzOutput connector BNC (UG-290A/U)Operating temperature 0 to 65 oCWeight 22 ounces


© 2009 Pearson Electronics, Inc. 4997..wpd 090312



PEARSONTM


Sensitivity 0.01 Volt/Ampere ±0.5%Output resistance 50 OhmsMaximum peak current 25,000 AmperesMaximum rms current 100 AmperesDroop rate 0.25 %/millisecondUseable rise time 20 nanosecondsCurrent time product 0.5 Ampere-second maximum*Low frequency 3 dB point 0.5 Hz (approximate)High frequency response 20 MHz ±3 dBI/f figure 3 peak Amperes/HzOutput connector BNC (UG-290A/U)Operating temperature 0 to 65 oCWeight 8.3 ounces



Pearson Electronics, Inc. 4009 Transport Street Palo Alto, CA 94303Telephone 650-494-6444 FAX 650-494-6716 www.pearsonelectronics.com


PEARSONTM


Sensitivity 1 V/A ±1%0.5 V/A into 50 Ω

Output resistance 50 ΩMaximum peak current 500 AMaximum rms current 10 ADroop rate 0.8 %/µsUseable rise time 1.5 nsMaximum It typical 0.0005 A s

0.002 A s with bias Low frequency 3 dB cut-off 400 Hz High frequency ±3 dB 250 MHz Maximum I²t / pulse 5 A² sOutput connector BNC (UG-290A/U)Operating temperature 0 to 65 oCWeight 0.68 kg

© 2000 Pearson Electronics, Inc. 6585.SPX_000124 Dimensions in inches


PEARSONTM


Sensitivity 0.5 V/A ±1%0.25 V/A into 50 Ω

Output resistance 50 Ω

Maximum peak current 1 000 A

Maximum rms current 20 A

Droop rate 0.1 %/μs

Useable rise time 2.5 ns

Maximum I•t typical 0.008 A s

Low frequency 3 dB cut-off 100 Hz

High frequency ±3 dB 150 MHz (approximate)

Maximum I²t / pulse 20 A² s

Output connector BNC (UG-290A/U)

Operating temperature 0 to 65 oC

Weight 0.68 kg


© 2012 Pearson Electronics, Inc. 6595.wpd 121127 Dimensions in inches




PEARSONTM


Sensitivity 0.1 V/A ±1%0.05 V/A into 50 S

Output resistance 50 SMaximum peak current 2 000 AMaximum rms current 40 ADroop rate 0.02 %/:sUseable rise time 5 nsMaximum I•t typical 0.01 A s

0.04 A s with biasLow frequency 3 dB cut-off 40 Hz High frequency ±3 dB 120 MHz Maximum I²t / pulse 100 A² sOutput connector BNC (UG-290A/U)Operating temperature 0 to 65 oCWeight 0.68 kg

© 2004 Pearson Electronics, Inc. 6600.wpd 040415 Dimensions in inches



PEARSONTM


Sensitivity 1 Volt/Ampere ±1%

Output resistance 50 OhmsMaximum peak current 500 AmperesMaximum rms current 10 AmperesDroop rate 6 %/microsecondUseable rise time 3.5 nanoseconds typicalCurrent time product 0.008 Amp-second maxLow frequency 3 dB point 4000 Hz (approximate)High frequency response 70 MHz ±1 dB

110 MHz ±3 dBI/f figure 0.04 peak Amperes/HzOutput connector BNCOperating temperature 0 to 65 oC


PEARSON ELECTRONICS, INC.4009 Transport Street, Palo Alto, California 94303 U.S.A.Telephone 650-494-6444 FAX 650-494-6716 Web site: www.pearsonelectronics.com

CLAMP-ON CURRENT MONITORS

8585C

4100C

7790

4688

7805

7760

5101

5949†

411C

7795

3525

7810

7655

5008C

7800

4160

7815

7450

5664

N

N

M

L

K

J

L

K

N

M

L

K

J

N

M

L

K

J

L

1.0

1.0

1.0

1.0

1.0

1.0

0.5

0.5

0.1

0.1

0.1

0.1

0.1

0.01

0.01

0.01

0.01

0.01

0.001

0.5

0.5

1.0

2.0

4.0

6.0

2.0

4.0

0.5

1.0

2.0

4.0

6.0

0.5

1.0

2.0

4.0

6.0

2.0

500

500

500

500

500

500

1,000

1,000

5,000

5,000

5,000

5,000

5,000

50,000

50,000

50,000

50,000

50,000

200,000

1.0

1.0

1.0

0.4

0.7

0.5

0.1

0.1

0.015

0.015

0.004

0.007

0.007

0.005

0.003

0.001

0.001

0.001

0.00025

2

15

15

12

25

50

20

30

20

25

25

50

100

150

175

200

200

250

250

0.003

0.0015

0.002

0.005

0.004

0.005

0.02

0.02

0.15

0.15

0.5

0.4

0.4

1.0

0.8

2.5

3.0

3.0

8.0

5

5

5

15

15

20

25

30

50

60

100

150

175

150

125

300

400

400

500

1,500

1,500

1,500

600

1,000

750

150

150

25

25

6.0

10

10

7.5

5.0

1.5

1.5

1.5

0.4

200

25

25

30

25

7.0

18

12

20

15

15

7.0

4.0

3.0

2.0

2.0

2.0

1.5

1.5

0.01

0.008

0.01

0.03

0.02

0.03

0.08

0.08

0.7

0.8

2.5

2.0

2.0

4.2

4.0

15.0

15.0

12

35

5

150

150

150

150

350

700

700

18,000

18,000

18,000

18,000

35,000

250,000

140,000

1,000,000

2,000,000

2,000,000

1,000,000

2

2


Figure JThickness: 1 1/2"

Figure KThickness: 1 1/4"

Figure LThickness: 1 1/2"

Figure MThickness: 1"

Figure NThickness: 1"

Clamp-on Current Monitors

ModelNumber Figure

Output(volts/amp)

Hole Dia.(inches)

MaximumPeak Curr.(amps)

Droop(%/microsec.)

UseableRise Time(nanosec.)

IT Max.(amp-sec.)

MaximumRMS Curr.(amps.)

3db pt.Low(Hz)

3db pt.High(MHz)

l/f (rms/Hz)

l t calc(amps -sec)

Accuracy ±1% or better, initial pulse response for all models, with a high impedance load such as 1 megaohm in parallel with 20 pF. A 50 ohm termination will reduce the output to half. All models listed below come with a BNC connector except as noted and are to be used with a 50 ohm coaxial cable. The current monitor case is conductive and not insulated. Adequate insulation must be provided on the conductor being monitored. To avoid electrical shock, do not mount or remove the current monitor from a live conductor. † Type N Connector.

Important Parameters:Droop: For a flat top current pulse, the output voltage decays toward zero. Initially, the decay appears linear and the slope is referred to as the droop rate. Usable Rise Time: If the 10 to 90% rise time is greater than the specified usable rise time, initial overshoot will be less than 10% of the pulse amplitude.

PEARSON ELECTRONICS,INC.


754-020

REV. –

03/13/15

Page 1 of 2

TEST PROCEDURE FOR

POWERLINE RIPPLE DETECTORS

This is the test procedure to be used when verifying the operation of a Pearson Electronics Powerline Ripple

Detector Model PRD-120 or PRD-240. When verifying the correct operation of a Powerline Ripple Detector, we

make use of a calibrated HP4195A network/spectrum analyzer or any 3-port network/spectrum analyzer can be

used

The transducer factor for all PRDs is tested in both the ‘Flat’ and ‘CS101’ mode twice during manufacturing.

Connections are made as shown in Figure 1. All cables should be 50 Ω characteristic impedance coaxial cables.

The Source/Signal port is connected to either the ‘Power Source’ or ‘EUT’ input port using an appropriate cable T-

adapter and banana adapter (newer PRDs can use either shrouded or un-shrouded banana plugs) and the output

of the cable T-adapter should connect to the reference port of the spectrum analyzer. 40 dB of attenuation is

typically used to improve the signal strength of the T/R measurement. The ‘Power Source/EUT’ selector switch

should be set to the input being used. The ‘EMI Receiver’ output of the PRD should connect to the Test port of the

spectrum analyzer.

Figure 1 - PRD test configuration.


754-020

REV. –

03/13/15

Page 2 of 2

The Powerline Ripple Detector is designed for operation within the CS101 limits of 30 Hz – 150 kHz. The spectrum

analyzer is used to perform a T/R of the PRD and verify the transducer factor of the unit, in both the ‘Flat’ and

‘CS101’ modes, throughout this frequency range. If attenuation is used on the spectrum analyzer reference port,

the amount of attenuation used should be subtracted from the measured transducer factor to arrive at the correct

value. Refer to the manual for the transducer factor and reference curves for a given model. When the

‘Frequency Response’ switch is in the ‘Flat’ position the measured response of the PRD should be flat between 30

Hz – 150 kHz. When the switch is in the ‘CS101’ position, the attenuation should decrease at 20 dB/decade above

5 kHz when viewed on a logarithmic scale.


PEARSONTM ATTENUATORMODEL A10 Voltage ratio 10:1 Impedance 50Ω Pearson Electronics, Inc. Palo Alto, CA U.S.A.


PEARSONTM

ATTENUATORMODEL A10

Voltage ratio 10:1 (–20 dB)Midband accuracy ±1%Input resistance 50 OhmsOutput resistance 50 OhmsMaximum peak voltage 500 VoltsMaximum RMS voltage 7.5 VoltsUseable rise time 5 nanosecondsLow frequency DCHigh frequency ±1dB 100 MHz Connectors BNCOperating temperature 0 to 65 oCWeight 5 ounces

The Model A10 attenuator may be used with all standard PearsonCurrent Monitors, except Model 2093, to reduce signal output voltageby a factor of 10. All maximum ratings of these models are preserved.The attenuator is symmetrical and can be used in either direction.

© 1999 Pearson Electronics, Inc. A10.SPX-990506



MODEL VD-305ACAPACITIVEVOLTAGEDIVIDER

Maximum Pulse Voltage, in oil

Maximum Pulse Voltage, in air

Voltage Division Ratio, in oil

Frequency Range, into 1MΩ load

Droop Rate, into 1 MΩ load

Usable Rise-time

Capacitance added to circuit

300 kilovolt

50 kilovolt

5000:1 nominal

30 Hz to 4 MHz

0.02 % / µsecond

100 nanosecond

18 pF (approximate)

The Model VD-305A capacitive voltage divider is intended for the measurement of voltageamplitude and wave-shape of ac signals at high potential. It has a nominal division ratio of 5000:1,and the exact measured ratio is printed on the name-plate. This ratio is measured in insulating oilat 35oC, and is accurate to ±5%. The division ratio is temperature compensated to ±1% over therange of 20o to 80oC. Calibration for other ratios or for use in air is available from the factory for anadditional charge.

The unit consists of two capacitors connected in series. The high voltage center electrode formsa capacitor with a guarded pickup ring located in the lower metal cylinder. This pickup ring isconnected to the center conductor of the output connector via a 50Ω resistor. The low-voltagecapacitor connects the pickup ring to the outer conductor of the connector. The output voltage isthus a fraction of the input voltage determined by the ratio of the capacitances.

Typically, the divider is placed in high-voltage insulating oil, such as Shell Diala AX, along with othercomponents of the high-voltage circuit being measured. The case has drain holes to allow oil toenter or drain out as the unit is inserted or removed from the oil bath. The standard calibration isfor use in oil, which has a dielectric constant of about 2.3. If the unit is used in air, its division ratiowill be approximately 11500:1, but if this is the intended use, a factory calibration of 5000:1 in airwould be more accurate and desirable. The maximum pulse voltage rating for use in air is 50 kV.These ratings are for pulses up to 5 µseconds duration. Consult Pearson engineering for voltagederating for longer pulses.

As manufactured, the outer conductor of the connector is isolated from the case. Safe operationrequires that a connection be made from the connector shell to ground. However, this isolationmakes it possible to choose the location and nature of this connection so that ground loops may becontrolled.

The conductor connecting the high voltage to the voltage divider should be free of sharp points oredges, and of sufficient diameter to avoid corona and arcs. The outer conductor of a standardcoaxial cable, such as RG-58, works well. The conductor should be located as far as possible fromthe acrylic chimney and any grounded conductors such as the case or the output cable. Occasionalarcs usually do not cause damage to the unit. However, if sustained arcing causes visible damageto the acrylic chimney, the unit should be returned for repair. The screws which attach the chimneyto the base also hold the guard ring and should not be removed by the user. The VD-305A can besecured to a base-plate or tank bottom with 1/4 inch bolts or studs. Two four-place bolt circles areprovided. The smaller diameter circle is compatible with early units.



MODEL VD-305ACAPACITIVEVOLTAGE DIVIDER




MODEL VD-305ACAPACITIVEVOLTAGEDIVIDER(for use in air)

Maximum Pulse Voltage, in air

Voltage Division Ratio, in air

Frequency Range, into 1MΩ load

Droop Rate, into 1 MΩ load

Usable Rise-time

Capacitance added to circuit

50 kilovolt

5000:1

70 Hz to 4 MHz

0.05 % / µsecond

100 nanosecond

8 pF (approximate)

The Model VD-305A capacitive voltage divider is intended for the measurement of voltageamplitude and wave-shape of ac signals at high potential. It has a nominal division ratio of 5000:1,and the exact measured ratio is printed on the name-plate. This ratio is measured in air at 22oC, andis accurate to ±5%. The division ratio is temperature compensated to ±1% over the range of 20o

to 80oC.

The unit consists of two capacitors connected in series. The high voltage center electrode formsa capacitor with a guarded pickup ring located in the lower metal cylinder. This pickup ring isconnected to the center conductor of the output connector via a 50Ω resistor. The low-voltagecapacitor connects the pickup ring to the outer conductor of the connector. The output voltage isthus a fraction of the input voltage determined by the ratio of the capacitances.

The maximum pulse voltage rating for use in air is 50 kV. This rating is for pulses up to 5 µsecondsduration. Consult Pearson engineering for voltage derating for longer pulses.

As manufactured, the outer conductor of the connector is isolated from the case. Safe operationrequires that a connection be made from the connector shell to ground. However, this isolationmakes it possible to choose the location and nature of this connection so that ground loops may becontrolled.

The conductor connecting the high voltage to the voltage divider should be free of sharp points oredges, and of sufficient diameter to avoid corona and arcs. The outer conductor of a standardcoaxial cable, such as RG-58, works well. The conductor should be located as far as possible fromthe acrylic chimney and any grounded conductors such as the case or the output cable. Occasionalarcs usually do not cause damage to the unit. However, if sustained arcing causes visible damageto the acrylic chimney, the unit should be returned for repair. The screws which attach the chimneyto the base also hold the guard ring and should not be removed by the user. The VD-305A can besecured to a base-plate or tank bottom with 1/4 inch bolts or studs. Two four-place bolt circles areprovided. The smaller diameter circle is compatible with early units.



MODEL VD-305ACAPACITIVEVOLTAGE DIVIDER



D f= 2π


Current Monitor Terms: Droop Rate

The droop rate is the downward slope of the top of the output voltage pulse resulting from a flat-top current input pulse. Because the current monitor cannot pass DC, whenever the outputvoltage is non-zero and the current is constant, as during the flat top of the pulse, the voltagedecays toward zero exponentially. This is illustrated in the upper trace of the figure below. Thelower trace represents the applied current pulse.

The droop rate is the first term (linear) of the power series representing that exponential decay.The time constant of the decay is the reciprocal of the droop rate, or the time interval for 100 %decay predicted by the linear term.

The droop rate (D) is also mathematically connected to the low frequency cut-off point (f):


Pearson Electronics, Inc. • 4009 Transport Street • Palo Alto, CA 94303Telephone 650-494-6444 • FAX 650-494-6716 • www.pearsonelectronnics.com


FREQUENCY RESPONSEPHASE SHIFT

Pearson Current Monitors exhibit amplitude response and phase shift as a function offrequency similar to that depicted in the above figure. To apply this graph to a specificmodel, use the low and high 3 dB points given in the specification sheet.



Current Monitor Terms: Rise Time

The useable rise time of a current transformer is defined with respect to a transition from onecurrent level to another. If the difference between the levels is defined as 100%, then the risetime is the interval from 10% to 90% of the transition.

When a fast-rising current transition is applied to a current transformer, it is typical for the outputto either overshoot and ring, or rise more slowly than the input current pulse. If the overshoot orringing amplitude is less than 10% of the transition, the output is considered useable. Therefore,the fastest 10 to 90% transition that causes no more than 10% overshoot and ringing is knownas the useable rise time. If the output does not overshoot or ring, then the output voltage rise timebecomes the useable rise time.

The figure below illustrates this for a Pearson Model 110. A faster Model 2877 is used to showthe input current wave shape on channel 2. The oscilloscope has measured the rise time ofchannel 2 as 12.90 ns. This is the useable rise time because it has caused a 10% overshoot inthe Model 110 output voltage signal shown in channel 1.

In choosing a current monitor, the specified useable rise time should be less than the rise-time ofthe current pulse to be viewed.

© 1999Pearson Electronics, Inc.



BIAS NOTES

All Pearson Current Monitors useferromagnetic cores which can becomesaturated by the dc component(average value) of the current (Idc), orby the current-time product (It) of thepulses. Since the output of the monitoris sustained by the changing flux level inthe core, magnetic saturation willdegrade performance. As a function ofincreasing Idc, the effective permeabilityof the core decreases, causing thedroop rate and low-frequency cut-offpoint to increase. Also, the available fluxswing is decreased, reducing themaximum viewable It. When viewing apulse, the output voltage will drop tozero when the integrated value ofcurrent with respect to time causes theflux level to reach saturation. Themonitor will recover after the appliedcurrent returns to zero and the fluxreturns to its remanent value.

Biasing can enable operation with alarger dc component of current, and/orimprove the maximum viewablecurrent-time product. The objective of biasing is to reset the flux in the core toa value near the negative saturationlevel so that the maximum flux swing isavailable.

The It value given in the specificationsheets is based on a flux swing fromzero to saturation for all models.However, models indicated in thespecification sheet with ** havehigh-permeability core material whichhas a residual induction of 0.6 to 0.8 of

the saturation value. These models will needbias to obtain more than 0.2 to 0.4 of therated It. With bias all models can achievenearly twice the specified It, since the fluxcan be reset close to negative saturation.

For pulses with small It, the droop rate willincrease as Idc approaches "Idc max" in thetable. Idc max is the approximate level atwhich the droop rate will be doubled. In thissituation, bias is used to cancel Idc andallow normal operation.

Bias may be applied by either of twomethods. The necessary Ampere-turns maybe obtained by injecting current into thesecondary winding via a coaxial "T" adapter,or by winding one or more turns of wirethrough the current monitor hole. The choiceof methods depends on the model and onthe available power supply.

BIAS THROUGH HOLEThe circuit configuration for biasing throughthe hole is shown in Figure 1. The polarity ofthe bias current should be opposite to that ofthe expected signal. The correct value forthe bias current is the larger of Idc or "IBIAS"from Table 1. The bias current source musthave enough resistance to avoid the effect ofa shorted turn through the core.

The amount of current needed from the biassupply may be reduced by using multipleturns on the bias winding through the currentmonitor hole. To calculate the minimum bias



supply source resistance, RBIAS, such thatits loading will not affect the currentmonitor sensitivity by more than 1%,multiply the square of the number ofturns, N, on the bias winding by thefactor in the table appropriate to thecurrent monitor model.

For example, if the Model 110 iswrapped with 10 turns, the bias supplysource resistance should be at least 102x 0.02 = 2 ohm. Using IBIAS from Table1, the needed voltage is 2 ohm x 0.59Ampere-turns / 10 turns = 0.118 Volts.

To minimize direct magnetic couplingbetween the bias winding and theconductor under test, the bias windingshould be wrapped onto the currentmonitor as illustrated in Figure 2, andthe conductor under test should becentered approximately in the hole.

BIAS WITH T ADAPTERBias current may also be injected intothe secondary winding via a "T" adapterconnected to the output connector.Figure 3 shows the proper circuitconfiguration. The polarity of the biascurrent should be opposite to that of theoutput voltage pulses. The load at theinstrument end of the cable should behigh enough so that no significant biascurrent is diverted from the monitor.The source resistance of the biascurrent source must not load the outputof the current monitor. For models with50 ohm output resistance, a bias sourceresistance of 5000 ohm will result in a1% shift in sensitivity. The amount ofcurrent to be applied with this method isthat which was calculated above dividedby "Ratio" from Table 1.

In a pure ac signal, Idc is zero and theIt of the positive and negative parts ofthe cycle are equal. The "I/f" value fromthe specification sheet gives the



Model IDC MAX (A) IBIAS (A-turn) Ratio RBIAS ( x N2 Ω )

2877 0.17 0.13 50 2.0 4100 0.32 0.25 50 2.0 2100 0.78 0.59 50 2.0 3100 1.9 1.4 50 2.0 150 0.78 0.59 99 0.50 325 25 142 0.17

2878 0.17 0.13 45 0.20 410 10 424 0.020 411 0.32 0.25 424 0.020 110 0.78 0.59 414 0.020

110A 0.78 0.59 414 0.020 310 25 352 0.028

1010 160 120 490 0.020 1025 8 361 0.0031 3025 25 513 0.0028 2879 0.17 0.13 46 0.010 101 0.78 0.59 325 0.0010

301X 60 312 0.0011 1080 60 173 0.00050 1330 60 345 0.00025 1423 60 80 0.00005 2093 150 473 0.00010

maximum amplitude for a sine wave offrequency f. Biasing cannot improveperformance for ac signals. The amountof current needed from the bias supplymay be reduced by using multiple turnson the bias winding through the currentmonitor hole. To calculate the minimumbias supply source resistance, RBIAS,such that its loading will not affect thecurrent monitor sensitivity by more than1%, multiply the square of the numberof turns, N, on the bias winding by thefactor in the table appropriate to thecurrent monitor model.

For example, if the Model 110 is wrappedwith 10 turns, the bias supply sourceresistance should be at least 102 x 0.02 = 2ohm. Using IBIAS from Table 1, the neededvoltage is 2 ohm x 0.59 Ampere-turns / 10turns = 0.118 Volts.

To minimize direct magnetic couplingbetween the bias winding and the conductorunder test, the bias winding should bewrapped onto the current monitor asillustrated in Figure 2, and the conductorunder test should be centered approximatelyin the hole.

Table 1




CURRENT MONITORCERTIFICATE OF CALIBRATION

Purchase Order:Customer:

Contact:

Calibration Date:Due Date:

PEI-7777Pearson Electronics, Inc.1860 Embarcadero RoadPalo Alto, CA 94303Chris Waters

04/22/0204/22/03

Certificate:Model:Serial Number:

Temperature:Humidity:

6629 287888888

76oF46%

TEST DATAAmplitude Error: 0.43 %Droop Rate: 0.0044 % / µsecondPolarity: as markedUseable Rise-time: 0.005 µsecondTolerance condition upon receipt: INComments:

Pearson Electronics certifies that the above Current Monitor meets or exceeds allpublished specifications, except as noted above, and has been calibrated using standardsand instruments whose accuracies are traceable to the National Institute of Standards andTechnology. The policies and procedures at this facility comply with MIL-STD-45662A. Theassigned accuracy capability for the amplitude error test standards is 0.1%. For modelswhich use silicon-steel cores, the initial permeability of the magnetic material issubstantially lower than its value in the normal operating range of the current monitor.Since relatively low currents are used for testing, the droop measurement on these modelsis considered acceptable if it is less than a factor of two over the specified value.

Calibration Test Procedure: Pearson documents 754-004, 754-005, 757-006, and 754-010Calibration Equipment used:Model type ID number Cal date Due date

TEK FG504 function generator B043793 07-11-01 07-11-02HP 54615B oscilloscope US35420258 05-11-01 05-11-02Biddle 601243 resistor 35491 09-25-01 09-25-02Biddle 601230 resistor 34983 09-25-01 09-25-02Biddle 601235 resistor 35785 09-25-01 09-25-02

Certified byChristopher A. Waters, Quality Assurance Form 740-022

電流検出器 - コーンズテクノロジー株式会社 · 2019-01-30 · the droop rate will...

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Transcript of 電流検出器 - コーンズテクノロジー株式会社 · 2019-01-30 · the droop rate will...

電流検出器 - コーンズ テクノロジー株式会社 · 2019-01-30 · the droop rate will...

Documents

Transcript of 電流検出器 - コーンズ テクノロジー株式会社 · 2019-01-30 · the droop rate will...

電流検出器 - コーンズテクノロジー株式会社 · 2019-01-30 · the droop rate will...

Transcript of 電流検出器 - コーンズテクノロジー株式会社 · 2019-01-30 · the droop rate will...