Cpc 100 Test Guide Enu

8/13/2019 Cpc 100 Test Guide Enu

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Application Note: CPC 100 Test Guide

OMICRONelectronics GmbH 2005-09-05 2/15

1 Introduction

This is a guide to test the CPC 100 unit.

It helps to make a functional test of the CPC 100 It helps to make a statement that the CPC 100 is within its tolerance limits with a high probability

It does not help to make an approved statement whether the unit is within its guaranteedtolerance limits this is called calibration

The CPC 100 test as described in this document does not need very much equipment.

The CPC 100 calibration as described in the document "Calibration Guide for CPC 100" needs muchmore equipment with the advantage to have verified the tolerance limits.

If results of the measurements show that the CPC unit is out of the expected limits, the unit must be sentto OMICRON electronics for adjustment and recalibration. It is not possible for the user to performadjustments of a CPC unit. When sending a unit to OMICRON, please attach a copy of the test resultsand send as much background information as possible.

Warning Only qualified, service trained personnel who are aware of the hazards involved shouldremove or connect wiring to the CPC.

Measuring high voltages is always hazardous. All CPC terminals (both front and side)must be considered as hazardous whenever inputs in excess of 42V are connected toany terminal.

Also read the chapter Safety Instructions of the CPC100 reference manual.


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2 Requirements for Calibration Equipment

2.1 Recommended equipment or equivalent

2.1.1 CPC 100 accessories

The CPC 100 standard accessories should be available on site when the test takes place.

2.1.2 Current Transformer

Device Type Manufacturer Homepage

CurrentTransformer

AC current

KSS 104; 1000:1; 1VA;

0,2% @ 800A @ 0.5VA

Measurement points:800A, 400A, 200A

RITZ Messwandler,

Germany

http://www.ritz-international.de

Any other device can be used as long as the following values can be achieved:

Imax = 1000A; ratio 1000:1; 50Hz or 60Hz; 1 VA

Uncertainty < 0,2% @ 800 A< 0,2% @ 400 A

2.1.3 Power Resistors


Power Resistors 220, HS100 (11x)

2k2, HS10

ARCOL UK Ltd, CornwallEngland

http://www.arcol.co.uk/


Imax = 50mA, R = 2k2/ 10W, uncertainty < 5%, TK < 25 ppm/C

Imax = 500mA, R = 220/ 100W (1x), uncertainty < 5%, TK < 100 ppm/C

Imax = 5A, R = 22/ 1000W (10x220/100W), uncertainty < 5%, TK < 100 ppm/C

Note: Usage of resistors with low temperature drift is recommended to ensure stable readings, althoughthe uncertainty of the power resistors is not of great influence to the measurement. They are only used tocontrol the output current of the CPC high voltage output.

2.1.4 DC Shunt


DC Shunt 500ADC 50mV 0.1%

L 500-50/01

Thermovolt AB, Sweden http://www.thermovolt.se


Imax = 400ADC, R = 0,1m, uncertainty < 0,1% (uncalibrated)


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3 Preparation and Fundamentals

3.1 Fundamentals

Disconnect any cables that may be plugged and are not relevant for the desired test.

3.2 Preparation

Turn the CPC on. Warm-up time > 25 min

Power supply: 230V/50Hz or 110V/60Hz

Ambient temperature: 73F 10F / 23C 5C

3.3 Used Abbreviations

Nom:nominal value of the CPC unit

Res:Used Resistor for a specific test

Freq:frequency when the test is performed

MeasCPC:measured value on the CPC display

MeasErr:calculated measurement error

TolCPC:Specified CPC tolerance expressed in %

TolShunt:Tolerance of a used shunt expressed in %

TolSum:Sum of tolerances of CPC and reference equipment in %

Ok?:Assessment if the calculated error is within the specified limit

3.4 Conversion Table

[ ] [ppm]0,01 100

0,1 1000

1 10000


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3.5 CPC QuickCard Controls

A summary of the QuickCard Controls used in the test procedure. For more detailed information see CPCmanual.


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4 Test Procedure

4.1 High Voltage Output Magnitude and V1 AC Input

The 2kVAC of the CPC has the possibility of an internal measurement which is also defined in the CPCspecifications. The output voltage of the CPC is measured using its V1 AC voltage input.

Warning: Do not exceed a maximum voltage of 300 Vrms. The V1 AC output would be destroyedan a dangerous situation could arise.

Procedure:

Start up Quick

Select output range 500V AC first, then 1000V AC and finally 2000V AC and set the output value as

specified in table in the appendix chapter 5.1 .

Select Measurement Vout in the first column

Select Measurment V1 AC in the second column

Activate the output by pressing the green button

Read the result Vout and write it to the column MeasCPC Vout

Read the result V1AC and write it to the column MeasCPC V1AC

Calculate the Error with

%001*V1ACMeasCPC

V1ACMeasCPCVoutMeasCPCMeasErr

=

Assess the result. Test is ok if

TolSumMeasErr <

400A DC 800A AC

2kV AC

EXT.BOOSTERVmax

300V AC


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4.2 High Voltage Output Current and I AC Input

The internal current measurement of the high voltage output is tested by outputting a specific voltage andmeasuring the current flowing over a defined resistance.

Three different load resistors according to the measurement table in the appendix chapter 5.2 are used,one after each other.

Warning: There are live threatening voltages during this test! At the shunts this is verydangerous, so please take any precaution that neither the tester nor any passerbycould come into danger. Press the Emergency button when working on the wiring.Obey national security standards too!

Procedure:

Start up Quick

Select output range 500V AC, and set the output value to about 100V. Select Measurements: I Outand I AC


Adjust the output voltage to set the current as specified in table in the appendix chapter 5.2 .

Read the result of IOut and write it to the column MeasCPC IOut

Read the result of I AC and write it to the column MeasCPC IAC


%001*IACMeasCPC

IACMeasCPCIOutMeasCPCMeasErr

=


TolSumMeasErr <

Repeat the test using the other resistors

Note: Especially at the 5A measurement the results drift as the resistor warms up due to thechange of the resistance value. This is normal, press "Keep Result" to keep bothresults at the same time and take the readings.

400A DC 800A AC

2kV AC

EXT.BOOSTER

Vmax

100V AC

RLoad


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4.3 High Current Output 800A AC - Magnitude

To test the current output a high accuracy current transformer is needed.

Warning: If the CT's secondary circuit is open when a current is applied to its primary side lifethreatening voltages will occur. Therefore leave the secondary side always shorted orconnected to the I AC output of the CPC.

Procedure:

Start up Quick

Select output range 800A AC and set the output value as specified in table in the appendix chapter5.3 .

Select Measurements IOut and IAC



Read the result of IAC and write it to the column MeasCPC IAC

If known add the error of the current transformer at that particular amplitude and enter it to the fieldNomErrTransf. If not known enter 0%.


sfNomErrTran%001*IACMeasCPC

IACMeasCPCIOutMeasCPCMeasErr

=

Write the tolerance of the transformer to the column TolTrans

Add the tolerances of the CPC and the reference CT and write it to the column TolSum

TolTransIACTolCPCIOutTolCPCTolSum ++=


TolSumMeasErr <

400A DC 800A AC

2kV AC

EXT.BOOSTER

CT1000:1


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4.4 High Current Output 400A DC

To test the current outputs a power DC shunt of 0,1 mis required. By measuring the voltage drop acrossthe shunt the current can be measured indirectly.

Procedure:

Start up Quick

Select Output Mode 400A DC first, and set the magnitude as specified in table in the appendixchapter 5.4 .

Select Measurement: IOut

Select Measurement: VDC



Read the result of VDC and write it to the column MeasCPC VDC

Calculate the current from the voltage measured and write it to the column Calc Current.


%001*VDCMeasCPC

VDCMeasCPCIOutMeasCPCMeasErr

=

Add the tolerance of the used Shunt and write the result to the column TolShunt

Add the tolerances of the CPC and the Shunt and write it to the column TolSum

TolShuntTolCPCTolSum +=

Assess the result. Calibration is ok if

TolSumMeasErr <

Shunt100

400A DC 800A AC

2kV AC

EXT.BOOSTER


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4.5 Binary Input

The function of the binary input should be checked.

4.5.1 Dry Contact Check

Procedure:

Start up Quick

Check if the Binary Input does show an open contact symbol:

Short circuit the binary input

Check if the Binary Input does show an closed contact symbol:


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Ulrich Klapper

C:\Documents and Settings\ClaFei00\Local Settings\Temporary Internet Files\OLK47\TestGuide CPC100.doc

OMICRONelectronics GmbH 2005-09-05

5 Report CPC100 accuracy check

These pages can be used as a form, to keep the test results and make an assessment of the CPC 100.

5.0 Device Identification

Type

Serial Number

Option

Date

Performed by

Department

Next calibration

5.1 High Voltage Output Magnitude and V1AC Input

5.1.1 2kV AC Output Range 500V AC, V1 AC Input

Settings Measurements Toleranc

Nom Freq MeasCPC Vout MeasCPC V1AC MeasErr TolCPC Vout TolCPC V

[VAC] [Hz] [VAC] [VAC] [%] [%] [%]

30 55 1,8 0,2

150 55 0,4 0,3

300 55 0,3 0,2


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Ulrich Klapper


OMICRONelectronics GmbH 2005-09-05

5.3 High Current Output 800A AC - Magnitude

800A AC Output

Assuming the CT is class 0.1

Settings Measurements Toleranc

Nom Freq MeasCPCIOut

MeasRefIAC

NomErrTrans

MeasErr TolCPCIOut

TolCPCIAC

[IAC] [Hz] [IAC] [IAC] [%] [%] [%] [%]

400 55 0,6 0,4

800 55 0,4 0,2

5.4 High Current Outputs 400A DC and V DC Input

400A DC Output and V DC Input

Settings Measurements Toleran

Nom Res Freq Meas CPCIOut

Meas CPCVDC

Calc Current Meas Err TolCPCIOut

TolCPCVDC

[IDC] [m] [Hz] [IDC] [UDC] [IDC] [%] [%] [%]

200 0,1 - 0,6 1,1

400 0,1 - 0,5 0,6


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Ulrich Klapper Application Note: CPC 100 Test Guide



6 Specifications

Level guaranteed Phase gar.

Input Range Reading Full Scale @100%10A AC/DC 10A AC 0,1% 0,1% 0,2% 0.20

1A AC 0,1% 0,1% 0,2% 0.30

10A DC 0,05% 0,15% 0,2% -

1A DC 0,05% 0,15% 0,2% -

V1 AC 300V 0,1% 0,1% 0,2% 0.20

30V 0,1% 0,1% 0,2% 0.20

3V 0,2% 0,1% 0,3% 0.20

300mV 0,3% 0,1% 0,4% 0.20

V2 AC 3V 0,05% 0,15% 0,2% 0.20

300mV 0,15% 0,15% 0,3% 0.20

30mV 0,2% 0,5% 0,7% 0.30

10V DC 10V 0,05% 0,15% 0,2% -

1V 0,05% 0,15% 0,2% -100mV 0,1% 0,2% 0,3% -

10mV 0,1% 0,3% 0,4% -


Output Range Reading Full Scale @100%800A AC - 0,2% 0,2% 0,4% 0.20

400A DC - 0,4% 0,1% 0,5% -

2kV AC 0,2%V 0,1% 0,1% 0,2% 0.20

1000V 0,1% 0,1% 0,2% 0.30

0,05%V 0,1% 0,1% 0,2% 0.40

5A 0,4% 0,1% 0,5% 0.20 0,05%mA 0,1% 0,1% 0,2% 0.20


Booster Range Reading Full Scale @100%0,2%A - 0,25% 0,25% 0,5% 0.50

1000A - 0,25% 0,25% 0,5% 0.50

7 History

Rev Author Description Tested by Released

1.0 Ulrich Klapper Initial version MSI 2005-01-20

1.01 Ulrich Klapper Ritz link corrected and Power Resistors chapterupdated

2005-08-17

1.02 Ulrich Klapper Order information of equipment needed updated - 2005-09-05

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