• This method can be used when the CT under test is in the same or different ratio as the I/V conversion standard.

• Use a vector voltage analyzer to measure the ratio difference and angle difference of the CT under test.

High stable constant current source

• Output range: 20 mA ~ 100 A

• Best measurement uncertainty (k = 2): 300 ppm * RD + 200 ppm * RG

• Frequency range: 45 Hz ~ 1 kHz

Broadband I/V Conversion Standard A

• Rated primary current: 100 A ~ 5 kA

• Rated secondary voltage: 1 V

• Measurement frequency: 45 Hz ~ 1 kHz

• Best ratio uncertainty up to 50 ppm @ 50 Hz

Broadband I/V Conversion Standard B

• Rated primary current: 20 mA ~ 100 A

• Rated secondary voltage: 1 V

• Measurement frequency: 45 Hz ~ 1 kHz

• Best ratio uncertainty up to 50 ppm @ 50 Hz

Precision Coaxial Shunt

• One 1 A and one 5 A precision coaxial shunt

• Rated secondary voltage: 1 V

• Annual stability 18 ppm, AC/DC difference 20 ppm @ 50 Hz

Vector Voltage Analyzer

• Dual-channel voltage measurement range 0.5 mV ~ 6 V, forward and reverse measurement

• Best measurement uncertainty of dual-channel voltage ratio (k = 2): 0.005%

• Best measurement uncertainty of dual-channel phase shift (k = 2): 10 μrad

Adjustable load bank

• Programmable and adjustable

• Automatically adjust the secondary load of the current transformer under test