Product Introduction
TPHGC-G Variable Frequency Transformer Tester is a comprehensive transformer testing instrument that integrates functions such as volt-ampere characteristics, transformation ratio, polarity, error curve, angle difference and ratio difference, calculation of knee point, and secondary side loop inspection. TPHGC-G Variable Frequency Transformer Tester supports the detection of steady-state and transient parameters of CT and PT (protection, metering, TP types), and can meet the testing requirements in both laboratory and field environments.
Functional Features
1. The TPHGC-G Variable Frequency Transformer Tester adopts advanced automatic variable frequency power supply technology, with excitation voltage up to 30KV.
2. Meets the requirements of GB1207, GB1208, GB16847 (IEC60044-1, IEC60044-6) and other standards.
3. The instrument supports the detection of steady-state and transient parameters of CT and PT (protection, metering, TP types).
4. Automatically provides the (excitation) knee point value according to standards. Automatically provides 5% and 10% error curves.
5. Adopts intelligent controller, easy to operate. Large screen LCD graphical display operation interface.
6. Built-in micro fast printer, can directly print test results on site.
7. No need for external auxiliary equipment, the single unit can complete all testing items.
8. Simple and convenient testing, one-click completion of CT DC resistance, excitation, transformation ratio, and polarity tests. Except for load test, all other CT tests use the same wiring method.
9. Can save 3000 sets of test data, which will not be lost after power failure.
10. Supports USB flash drive data transfer, can be read through standard PC.
11. The instrument is small and lightweight, convenient for field testing.
Testing Functions
1. CT and PT volt-ampere characteristic curve (excitation characteristic)
2. CT automatically provides knee point value
3. CT automatically provides 5% and 10% error curves
4. CT and PT transformation ratio measurement
5. CT and PT polarity judgment
6. CT and PT phase measurement (angle difference)
7. CT and PT ratio difference measurement
8. CT and PT secondary winding resistance measurement
9. CT and PT secondary actual load measurement
10. CT and PT core demagnetization
11. CT remanence coefficient (Kr)
12. CT secondary time constant (Ts)
13. CT excitation inductance (LU)
14. CT transient area coefficient (Ktd)
15. CT peak instantaneous error (Er)
Technical Specifications
1. Working power supply: AC 220V±10%, 50Hz
2. Equipment output: 0～220Vrms, 5Arms (20A peak)
3. Ratio difference test accuracy: ≤0.05%
4. Secondary winding resistance measurement:
Range: 0.1～300Ω, Accuracy: ≤0.5%
5. Secondary actual load measurement:
Range: 5～1000VA, Accuracy: ≤0.5%
6. Phase measurement (angle difference):
Accuracy: ±4min, Resolution: 0.1min
7. CT transformation ratio measurement:
Range: 5-25000A/5A (5000A/1A), Accuracy: ±0.5%
8. PT transformation ratio measurement:
Range: 1:10000, Accuracy: ≤0.5%
9. Ambient temperature: -10℃～40℃
10. Ambient humidity: ≤90%
11. Altitude: ≤1000m
12. Instrument dimensions: 40×20×26(cm)
13. Instrument weight: ≤10Kg
