CTC780E CT/PT Analyzer (Variable frequency method)
Features
CTC780E Instrument transformer tester used to measure CT and PT excitation characteristic, ratio, polarity, secondary winding resistance, CT secondary circuit burden and so on testing work.
1) Using D.C. method and low frequency technology testing CT excitation characteristic below 80KV, working fast.
2) Using “voltage method” and “current method” measuring current transformer ratio and polarity (include transformer bushing CT).
3) Built-in power can output current, for checking the integrity of CT secondary circuit.
4) Output up to 200A with external current booster (option).
5) CT secondary winding resistance measurement.
6) CT secondary circuit burden measurement.
7) Measuring Voltage transformer excitation characteristic, ratio, polarity and secondary winding resistance.
8) Voltage transformer inductive voltage withstand test.
9) Drawing the excitation curve and calculating the knee point according to IEC60044-1 and IEC60044-6.
10) Drawing 5%, 10% CT error curve.
11) Measuring CT’s ratio error and phase displacement.
12) Measuring CT’s remanence factor (K_r), magnetizing inductance, secondary loop time constant (T_s), transient dimensioning factor (K_td), peak instantaneous error, accuracy limit factor (ALF), instrument security factor (FS).
13) Drawing current transformer Hysteresis loop curve.
14) Transparent display shows values and curve clearly both indoor and outdoor.
15) High speed thermal printer can print out values and curve.
16) Checking the connecting cable automatically. Wrong connecting warning instructions.
17) Built-in large memory storage can stored 3000 test values, loss of power without loss of values.
18) Using USB memory stick transfer the values to computer, and generate report.
19) Using USB memory stick to update software.
20) User interface has Chinese and English two language.
Specifications

Power supply	198 to 264V AC，47 to 63Hz
Output voltage	0 - 360V AC
Output current	0 -10Arms，peak 20A
Output current with ext. booster	0 - 200A AC (option)
Output power	0 – 3600VA
Output voltage measurement range	2 - 360V AC
Output voltage measurement accuracy	± 0.1%rdg ± 20mV
Output current measurement range	0.01- 10A
Output current measurement accuracy	± 0.1%rdg ± 2mA
Winding resistance measurement range	0 - 300Ω   Resolution: 1mΩ
Winding resistance measurement accuracy	± 0.1%rdg ± 1 mΩ
AC burden measurement	0-1000VA，Resolution: 0.01VA
Ratio measurement range	1-35000
Rated current ratio error	±0.05%
Rated current phase displacement error	When cosφ=0.8- 1，2min, Resolution 0.1min
Working environment	-20°C to 50°C    Humidity ≤90%RH   Non-condensing
Dimensions (W×H×D)	492 ×392 ×218mm
Weight	14kg

 
Note:
Ratio and phase displacement error is valid only under the condition below:
a) The knee point voltage >5V according to IEC60044-1.
b) The tested CT core with no air gap.
c) All the cables should be disconnect from primary side.
Under the interference condition, the tester accuracy may be degraded.
 

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