Введение в продукт
Wuhan UHV Power Technology Co.,Ltd., is a professional manufacturer and supplier of high-voltage power testing equipment in China.The UHV-107 CT/PT Volt-Ampere Characteristic Tester is engineered for automated testing of Protection-Class and Metering-Class CTs/PTs.The instrument integrates multiple functions including VA characteristic testing, turns ratio testing, polarity testing, and error analysis into one unit, enabling fast and accurate on-site and laboratory testing of transformers. It is an important testing device for substations, power plants, power supply enterprises, and transformer manufacturers in the power system.
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Product functions
1. Dual CT/PT Testing Capability: It supports comprehensive testing for both CTs and PTs, eliminating the need for separate instruments.
2. Excitation Characteristics Test: It measures the excitation (volt-ampere) characteristics of CTs and PTs. The device output is 0~2500V (peak value of 20A), with a high current output of 0~600A.
3. Ratio Measurement: It measures CT ratio (up to 3000A/1A or 15000A/5A) and PT ratio (up to 500kV) with an accuracy of ≤0.5%.
4. Automatic Calculations: It automatically gives the CT/PT excitation inflection point value according to procedure and automatically generates 5% and 10% error curves.
5. Data Management: It can store up to 3000 sets of test data with non-volatile memory. It supports USB data export to a standard PC for Word report generation and has a built-in mini fast printer for on-site printing.
6. Standalone Operation: All test items can be completed by a single machine without external auxiliary equipment.
Product Advantages
1. Complete Solution: The ability to perform all CT and PT tests with a single machine, without external auxiliary equipment, simplifies field setup, reduces equipment logistics, and improves testing efficiency.
2. High Precision and Automation: Automatic inflection point calculation and error curve generation save time, reduce manual calculation errors, and ensure accurate results. Excitation measurement accuracy is ≤1.0%.
3. Excellent Portability: Weighing only ≤25kg, the instrument is compact and highly portable, making it ideal for field testing in substations and remote locations.
4. Data Management: The large storage capacity (3000 sets), USB export, and built-in printer provide convenient documentation and traceability for quality records.
5. User-Friendly: The intelligent controller, large screen LCD with graphical display interface, and simple operation make the ct pt tester accessible to both experienced and less experienced users.
6. Compliance: It meets the requirements of GB 20840.3-2013, GB 20840.2-2014, and other relevant standards, ensuring test results are valid and accepted by certification bodies.
Product Characteristics
1. All-in-One Operation – Performs all tests (excitation curves, ratio, polarity, demag, 5%/10% error curves, secondary burden, AC withstand) without external equipment
2. Automated Analysis – Auto-detects CT/PT excitation knee-point and generates 5%/10% error curves
3. Intuitive Interface – Smart controller with large LCD graphical display for simplified operation
4. On-Site Reporting – Integrated micro-thermal printer for instant results
5. Advanced Data Management
Stores 3,000 test sets (battery-backed retention)
USB export to generate Word reports on standard PCs
6. Field-Optimized Design – Lightweight (≤22kg) and compact for enhanced portability
Параметры продукта
The main parameters
| Item | параметр | |
| Рабочий источник питания | AC220V±10% 、50Hz | |
| Devices output | 0~2500V (peak value of 20A) Note: 0 to 5A is the true value, and greater than 5A to 20A is the calculated value | |
| Высокий выходной ток | 0～600A | |
| Точность измерения возбуждения | ≤1.0% (0.5%* reading +0.5%* range) | |
| Коэффициент трансформации трансформатора тока измерение | The scope of | ≤3000A/1A(15000A/5A) |
| точность | ≤0.5% | |
| PT ratio измерение | The scope of | ≤500 кВ |
| точность | ≤0.5% | |
| work environment | температура | -10℃~40℃ |
| влажность | ≤90% | |
| высота | ≤1000m | |
| размер | 410 мм × 260 мм × 340 мм | |
| масса | ≤25kg | |
Application Scenarios
1. Substation Commissioning: Essential for testing and verifying CTs and PTs during the commissioning of new substations or after major equipment installation, ensuring correct ratio, polarity, and excitation characteristics.
2. Transformer Differential Protection Testing: Used to verify CT performance in transformer differential protection schemes, ensuring correct ratio and excitation characteristics to prevent misoperation during through-fault conditions.
3. Manufacturing Quality Control: Used by CT and PT manufacturers for factory acceptance testing, verifying that each unit meets design specifications and complies with national standards before shipment.
4. Utility Asset Management: Used by power utilities to build a comprehensive database of CT/PT performance over time, supporting condition-based maintenance decisions.
5. Laboratory Calibration and Type Testing: Employed in accredited laboratories for type testing and calibration of instrument transformers.
6. Troubleshooting and Fault Diagnosis: Deployed when CT or PT malfunctions are suspected, to diagnose excitation curve anomalies, ratio errors, or insulation degradation.
FAQ about CT PT Volt-ampere Tester
1. What is a transformer VA ratio polarity comprehensive tester?
A transformer VA ratio polarity comprehensive tester is an intelligent testing device used for measuring the performance parameters of current transformers (CT) and voltage transformers (PT). The instrument integrates multiple functions including VA characteristic testing, turns ratio testing, polarity testing, error analysis, and winding resistance testing into one unit, enabling rapid performance testing and condition assessment of transformers.
2. Why is VA characteristic testing of transformers necessary?
VA characteristic testing reflects the excitation performance and saturation characteristics of the transformer core, and is an important basis for determining whether the transformer meets protection and metering requirements. By analyzing parameters such as the excitation curve, knee-point voltage, and excitation current, issues such as core aging, winding abnormalities, or degradation of magnetic performance can be promptly identified, ensuring the safe and stable operation of the power system.
3. What roles do turns ratio and polarity testing play in transformer inspection?
Turns ratio testing is used to verify whether the actual transformation ratio of the transformer complies with the rated value, ensuring the accuracy of measurement and protection systems. Polarity testing is used to confirm the polarity relationship between the primary and secondary windings, preventing relay protection misoperation, metering errors, or system abnormalities caused by wiring mistakes. These two tests are important contents in pre-commissioning and periodic inspection of transformers.
4. What is the advantage of the automatic inflection point and error curve calculation?
What is the advantage of the automatic inflection point and error curve calculation?
The ct pt tester supplier automatically calculates the CT/PT excitation inflection point value according to procedure and automatically generates 5% and 10% error curves. This saves time, reduces manual calculation errors, and ensures accurate and consistent results.
5. How is data managed and exported?
The ct pt tester manufacturer can store up to 3000 sets of test data with non-volatile memory (data is not lost after power failure). It supports USB data export to a standard PC for Word report generation and has a built-in mini fast printer for on-site printing.
Wuhan UHV Power Technology Co., Ltd. offers professional testing equipment and complete technical support for power utilities, electrical contractors, testing laboratories, and equipment manufacturers. With extensive experience in electrical testing technology, we work as a trusted manufacturer and supplier of CT and PT testing equipment, providing stable product quality and flexible solutions for different testing requirements. Whether you need a single unit for field testing or equipment for large-scale electrical testing projects, we can provide suitable configurations according to your application. The price of the UHV-107 CT PT Volt-ampere Tester may vary depending on the configuration, quantity, and specific technical requirements. Contact us to discuss your application, check the available options, and get the latest product price and quotation directly from the manufacturer and supplier.
