KDHG-518C is an advanced variable frequency CT/PT analyzer with easy digital parameter settings and fully automated testing capabilities. Based on the low-frequency method, it can handle inflection point voltages above 40kV with only a 180V output. A 10-inch color graphical interface provides an intuitive user experience, automatically calculating inflection point values, 10%/5% error curves, ALF, FS, Ts, Kr, and inductance parameters to ensure comprehensive analysis. This transformer diagnostic instrument boasts 2000 record storage, USB export functionality, and a built-in printer. Weighing only 8.2kg, it is lightweight and portable, yet provides professional transformer diagnostic capabilities.

1. Comprehensive testing of protective current transformers (including TP class), metering current transformers, and protective PT electromagnetic units;
2. Automatic calculation of inflection point voltage/current, 10%/5% error curves, ALF, FS, Ts, Kr, and inductance parameters;
3. Compliant with GB1208 (IEC60044-1), GB16847 (IEC60044-6), and GB1207 standards, with automatic standard selection;
4. Based on low-frequency testing principles: Only a 180V output voltage is required to handle current transformers with inflection point voltages higher than 40kV;
5. One-button testing: Completes DC resistance, excitation, turns ratio, and polarity tests of current transformers (except for load testing) without additional wiring;
6. 10-inch color graphical interface; built-in printer for on-site curve printing;
7. Large-capacity storage: 2000 sets of test data, using non-volatile memory;
8. USB data export for easy analysis and Word report generation on a PC;
9. Automatic inflection point calculation; includes test data filtering, printing, and date/time functions;
10. Integrated portable design, weighing only 8.2kg, convenient for on-site testing.

Test purpose: protection and measurement CT, protection PT
Input power supply: AC220V±10%; Frequency 50/60Hz
Output voltage: 0~180Vrms, current 12Arms, 36A (peak)
CT ratio: measuring range 1~40000; Accuracy ±0.2%
PT ratio: measuring range 1~40000; Accuracy ±0.5%
Phase measurement: accuracy ±3min; Resolution 0.3min
Secondary winding resistance measurement: range 0~300Ω; Resolution 1mΩ; Accuracy 3%±1mΩ
Ac load measurement: range 0~300VA; Resolution 0.01VA; Accuracy 0.5%±0.1VA
Environmental conditions: Operating temperature -10℃ ~ +50℃; Storage temperature -10℃ ~ +50℃; Humidity Relative humidity: 5% to 95%, without condensation
Instrument size: 340mm×296mm×174mm
Weight: Weight <9kg