Tests for CT Current Transformer:

Tests for PT Potential Transformer:

1.  Excitation curve and parameters test

2.  Turns ratio test

3.  Ratio and phase error test

4.  Polarity mark check

5.  Winding resistance measurement

6.  Secondary loop burden measurement

7.  Error line curve test for protection CT

8.  Transient CT parameters test

9.  CT nameplate guess

10.  Saturation hysteresis loop curve measurement

1.  Turns ratio test

2.  Ratio error and phase angle error test

3.  Polarity test

4.  Secondary burden test

5.  Winding resistance test

Item Name

Test standards

IEC60044-1, IEC60044-6, IEC60044-2, IEC60044-5, C57.13

Power supply

 AC220V±10%, 50/60Hz±10%

Voltage output

 0.1~180V (AC)

Current output

 0.001~5A(RMS)

Power output

 500VA

Max.  knee voltage measurement

 45KV

Current measurement

  Range

0~10A (automatically change  range in 0.1/0.4/2/10A)

  Error

<±0.1%+0.01%FS

Voltage measurement

Range

0~200V (automatically change range in 1V/10V/70V/200V)

 Error

< ±0.1%+0.01%FS

Turns ratio measurement Range

1~35000

1~2000, error<0.05%

2000~5000,error<0.1%

5000~35000,error<0.2%

Phase measurement  

error

 ±2min

resolution

 0.01min

Winding resistance measurement

Range

0~8kΩ (automatically change range in2ohm/20ohm/80ohm/800ohm/8kohm)

Error

 < 0.2%RDG+0.02%FS

Maximum resolution :  0.1mΩ

Temperature measurement

-50~100 Celsius degree; error<3 Celsius degree

CT Secondary burden

Range

0~160ohm (automatically change range in 2ohm/20ohm/80ohm/160ohm)

Error

 <0.2%RDG+0.02%FS

Maximum resolution : 0.001ohm

PT Secondary burden

Error

0~80kohm (automatically change range in 800ohm/8kohm/80kohm)

Maximum

<0.2%RDG+0.02%FS

resolution

 0.1ohm

   PT ratio measurement

Range

1~35000,

1~10000 error<0.1%, 

10000~35000 error<0.2%

PT ratio error measurement :Typical error<0.05%,  Maximum Error<0.1%

PT phase angle measurement maximum error < 3min

Make evaluation for test results according to selected standards

Make word report for test result

Make word reports one time for multi-group test records on the PC

Calculate the ratio errors and phase angle errors at rated burden and working burden in one time test

Compare excitation curves with saved excitation curves in the same window

Memory capacity

 >1000 groups test results

Working condition temperature

 -10ºC~50ºC; moist ≤90%