ProductoIntroduction
The UHV-300 CT PT Tester is used for testing both current transformers (CT) and voltage transformers (VT). It performs key measurements such as the excitation characteristics and excitation parameters of instrument transformers. Additionally, it is capable of conducting turns ratio tests, polarity checks, and winding resistance measurements on transformer coils. Specifically for voltage transformers, it is employed for excitation characteristic testing, PT turns ratio verification, and PT polarity inspection.
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The main parameters
| Usage | Protection CT, protection PT |
| Producción | 0～180Vrms，12Arms，18A(Peak) |
| Precisión de la medición de voltaje | ±0.2% |
| Medición de relación CT | Range：1～40000 |
| Accuracy: ±0.2% ±0.05% (customizable) | |
| Medición de la relación PT | Range：1～40000 |
| accuracy：±0.2% | |
| Medición de fase | The resolution of the：0.5min |
| accuracy：±5min | |
| Medición de resistencia del devanado secundario | Range：0～300Ω |
| accuracy：2%±2mΩ | |
| Medición de carga de CA | Range：0～300VA |
| accuracy：2%±0.2VA | |
| fuente de alimentación | CA 220 V ± 10 %, 50 Hz. |
| Ambiente de trabajo | Temperature: -10℃ ~ 50℃, humidity: ≤90% |
| Dimensiones y peso | size：340mm×220mm×330m，The weight of the：≤9kg |
Product Characteristics
8、Easy to carry, device weight<9kg.
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Key factors affecting product performance
1. Manufacturing process and materials: Different winding processes and the quality of iron core materials directly determine the accuracy and stability of CT.
2. Operating environment: Temperature, humidity, and even electromagnetic interference can quietly change the working state of CT.
3. Aging and loss: Over long-term operation, the insulation performance of CT may decrease, and the iron core may also suffer losses, which will affect its current measurement accuracy.
4. Load variation: CT requires measuring instruments or protective devices connected to the secondary circuit, and the impedance of the secondary load can also affect the CT's transformation ratio error.
Main applicable scenarios
1. Power system operation and maintenance: suitable for power plants, substations, power supply companies and other units, used for CT pre operation inspection, operation cycle preventive testing and fault diagnosis, suitable for common CT types such as indoor, outdoor, oil immersed, dry, etc., to ensure the safe and stable operation of the power grid.
2. Electrical equipment manufacturing and maintenance: used for factory inspection of current transformer manufacturers, which can achieve efficient batch CT testing to ensure that products meet design standards; It is also suitable for electrical equipment maintenance units to perform parameter detection and fault location on fault CT, assisting in the completion of maintenance work.
3. In the field of scientific research and metrology: suitable for power research institutions and metrology testing departments, it can manually adjust test parameters, open data acquisition interfaces, connect to computers to record detailed test data, and meet scientific research and metrology needs such as CT performance deep analysis and standard calibration.
4. Industrial power system: Used for electrical systems in large industrial enterprises, regular testing of CT in the factory is carried out to ensure accurate measurement of industrial electricity and reliable relay protection, avoiding production safety hazards and economic losses caused by CT failures.
FAQ
1 . What parameters does the CT parameter analyzer mainly test? It mainly tests key parameters such as CT transformation ratio, error curve, excitation characteristics, and secondary circuit resistance.
2 . What impact will unqualified CT parameters have on the power grid? May lead to inaccurate measurement, refusal or misoperation of protective devices, and affect the safe and stable operation of the power grid.
3 . In what scenarios are CT parameter analyzers generally used? Mainly used for CT asset maintenance, preventive testing, and fault diagnosis in power substations, power plants, industrial enterprises, and other places.
4 . How to improve the efficiency of CT parameter analysis? Use an integrated and intelligent CT parameter analyzer, combined with good testing procedures.
5 . What are the advantages of Wuhan UHV Power Technology Co., Ltd. in the field of CT parameter analysis? The instruments of Wuhan UHV Power Technology Co., Ltd. usually have the characteristics of high precision, high integration, and easy operation, and can provide professional solutions.
