Product Introduction
CT PT Tester is mainly used for field testing of P class CT and PT. The test items mainly include excitation characteristic, transformation ratio, polarity, Degauss, 5％ and10％ error curves, secondary circuit check, withstand test of power frequency alternating current and secondary load. Adopt LCD, self-equipped minitype printer supporting field printing; supporting to use USB flash disk to dump data, with simple and convenient operation.
Functions
VA (Excitation) Characteristic Test: Measures and plots the excitation curve, automatically calculating the knee-point voltage and knee-point current.
Turns Ratio Test: Verifies whether the CT/PT ratio meets the design specifications.
Polarity Test: Determines whether the winding polarity is correct.
Winding Resistance Test: Detects faults such as broken circuits or poor connections in the windings.
Automatic Demagnetization: Eliminates residual magnetism in the CT to improve test accuracy.
Data Storage and Report Generation: Saves test data and supports exporting and printing standard test reports.
ഉൽപ്പന്ന പാരാമീറ്ററുകൾ
Function Table
| I. Current Transformer (CT) | II. Voltage Transformer (PT) |
| 1. Magnetization Curve | 1. Excitation Characteristic Test |
| 2. Transformation Ratio Test | 2. Transformation Ratio Test |
| 3. Polarity | 3. Polarity |
| 4. 5％ and 10％ error curve,ALF | 4. Withstand Test of Power Frequency |
| 5. Current Injecting | 5. Resistance Test |
| 6. FAST TEST | 6. Calculation of Knee Point Value |
| 7. Withstand Test of Power Frequency Alternating Current | 7. Actual Secondary Load Test |
| 8. Automatic Calculation of Excitation Knee Point Value | |
| 9. Actual Secondary Load Test | |
| 10. Resistance Test |
സാങ്കേതിക പാരാമീറ്റർ പട്ടിക
| പ്രധാന സാങ്കേതിക പാരാമീറ്ററുകൾ | |
| Operational Power Supply | AC220V±20V, 50～60Hz |
| Equipment Power Supply Output Waveform | സൈൻ വേവ് |
| Single Machine Output Voltage of Excitation Characteristic | 0~1200V |
| Excitation Current Set | 0~20A |
| Single Machine Output Current of Transformation Ratio Test | 0~600A |
| CT ratio measurement range | 5~25000A/5A(5000A/1A) |
| PT ratio measurement range | 1~500KV |
| Load Range | 5~500VA |
| Resistance measurement range | 0.1~300Ω |
| പിശക് | ≤0.5%(0.3%*Reading+0.2%*Range) |
| ഓപ്പറേറ്റിങ് താപനില | -10℃~+40℃ |
| ആപേക്ഷിക ആർദ്രത | <90RH% |
| ഉയരം | ≤1000m |
| Overall Dimension(Length*Width*Height) | 450*350*350(mm) |
| ഭാരം | ≤28Kg |
Product Characteristics
1、Support detection of CT and PT
2、It meets the requirements of GB 20840.3-2013, GB 20840.2-2014 and other regulations
3、All test items can be completed by a single machine without external auxiliary equipment
4、With its own mini fast printer, it can print test results directly on the spot
5、Using intelligent controller, simple operation
6、Large screen LCD, graphical display interface
7、CT/PT (excitation) inflection point value is given automatically according to the procedure
8、The 5% and 10% error curves are automatically given
9、3000 sets of test data can be saved, which will not be lost after power failure
10、Support U disk to save data, can be read through the standard PC, and generate WORD report
11、Compact and light weight ≤22kg, very conducive to field testing
Application Scenarios
Substation acceptance: Before the commissioning of new or retrofit projects, verify that the performance of the transformers meets the requirements.
Power operations and maintenance: Perform regular testing and fault diagnosis to promptly identify transformer abnormalities.
Power plant maintenance: Ensure the safe and reliable operation of relay protection and metering systems.
Transformer manufacturing and quality inspection: Used for factory testing, performance verification, and quality control.
Research and testing institutions: Used for product testing, metrology calibration, and educational experiments.
FAQ about CT PT Ampere Characteristic Tester
Why is the VA characteristic test required for the CT/PT VA characteristic tester?
The VA characteristic test reflects the excitation performance and saturation characteristics of the transformer core. By analyzing the excitation curve and knee-point voltage, it is possible to determine whether the transformer has core anomalies, winding faults, or performance degradation, providing a reliable basis for relay protection and metering systems.
What are the advantages of the CT/PT VA characteristic tester?
Compared with traditional testing methods, the CT/PT VA characteristic tester offers advantages such as a high degree of automation, fast test speed, high measurement accuracy, intelligent data analysis, and automatic report generation. It effectively improves on-site testing efficiency and reduces human errors.
What factors may affect the accuracy of test results?
Test results may be affected by factors such as wiring methods, contact resistance, ambient temperature, power supply stability, transformer condition, and equipment calibration status. Standardized operation, proper grounding, and regular calibration of the equipment help obtain more accurate and reliable test data.
6、Individually opening the equipment may lead to permanent damage.
