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％ and 10％ 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.
Product Features & Advantages
1. Standards ComplianceMeets GB 20840.3-2013 & GB 20840.2-2014 requirements for professional CT/PT verification.
2. Complete Testing Solution
Performs all test items independently without external devices - truly all-in-one functionality.
3. Instant Documentation
Built-in high-speed micro printer delivers immediate hardcopy results at test sites.
4. Intelligent Control
User-friendly operation via smart controller with intuitive graphical interface.
5. Visual Display
Large LCD screen clearly presents test data and graphical results.
6. Automatic Calculations
Precisely determines CT/PT excitation knee points per regulatory standards.
7. Error Curve Generation
Automatically plots both 5% and 10% error curves for compliance analysis.
8. Robust Data Storage
Retains 3,000 test records with power-loss protection.
9. Data Portability
USB interface enables easy data transfer and professional Word report generation.
10. Field-Ready Design
Compact form factor (<22kg) optimized for mobile operation.
11. Comprehensive Protection
Features multiple safeguards for equipment and operator safety.
製品パラメータ
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 | 4. Withstand Test of Power Frequency |
| 5. Current Injecting | 5. Degauss |
| 6. Degauss | 6. Calculation of Knee Point Value |
| 7. Withstand Test of Power Frequency Alternating Current | |
| 8. Automatic Calculation of Excitation Knee Point Value |
技術パラメータ表
| 主要な技術パラメータ | |
| Operational Power Supply | AC220V±20V, 50～60Hz |
| Equipment Power Supply Output Waveform | 正弦波 |
| Single Machine Output Voltage of Excitation Characteristic | 0~1200V |
| Excitation Output Current Set | 0~20A |
| Single Machine Output Current of Transformation Ratio Test | 0~1000A |
| CT ratio measurement range | 5~25000A/5A(5000A/1A) |
| PT ratio measurement range | 1～500KV |
| エラー | ≤0.5%(0.2%*Reading+0.3%*Range) |
| 動作温度 | -10℃~+40℃ |
| 相対湿度 | <90RH% |
| 高度 | ≤1000m |
| Overall Dimension(Length*Width*Height) | 450*280*260(mm) |
| 重さ | ≤30Kg |
Application Scenarios
The transformer VA ratio polarity comprehensive tester is primarily used in the detection, acceptance, and maintenance scenarios of current transformers (CT) and voltage transformers (PT) in power systems, including substations, power plants, transmission and distribution lines, power equipment manufacturers, and power testing institutions. In new construction projects, it can be used for factory inspection, installation commissioning, and pre-commissioning acceptance of transformers. In operation and maintenance, it can be used for periodic preventive testing to inspect transformer ratio, polarity, excitation characteristics, and winding condition, promptly identifying issues such as core anomalies and winding faults. During fault handling, it can be used for fault diagnosis and cause analysis, ensuring the accurate and reliable operation of relay protection, metering, and automation systems. In addition, the device is also widely used in power research, technical supervision, and equipment maintenance, making it an important testing tool for ensuring the safe and stable operation of the power grid.
FAQ about CT PT Comprehensive Tester
What is a transformer VA ratio polarity comprehensive tester, and why is it used for transformer testing?
A transformer VA ratio polarity comprehensive tester is an integrated test device used for performance testing of current transformers (CT) and voltage transformers (PT). By applying test signals to the secondary side of the transformer and collecting response data, it enables analysis of excitation characteristics, ratio relationships, winding condition, and connection polarity. The device integrates multiple testing functions into one unit. Compared with traditional decentralized testing methods, it reduces the number of test equipment required, improves on-site testing efficiency, and enhances data analysis capabilities.
What is the role of VA characteristic testing in transformer inspection?
VA characteristic testing measures the relationship between voltage and current during the excitation process of the transformer, analyzing the core's magnetization performance and operating condition. This test helps determine whether the core performance of the transformer meets the requirements for use, providing important evidence for reliable operation of protection systems, equipment condition assessment, and abnormal cause analysis.
Can the transformer comprehensive tester be used in conjunction with other power testing equipment?
Yes. The transformer comprehensive tester can typically be used together with power equipment condition monitoring systems, relay protection testers, insulation testing equipment, and data management platforms to form a more complete electrical equipment testing system. By combining multiple testing methods, users can gain a more comprehensive understanding of equipment operating conditions and improve power system maintenance efficiency.
