Product Introduction:
Wuhan UHV Power Technology Co.,Ltd., is a professional manufacturer and supplier of high-voltage power testing equipment in China.The Transmission Line Parameter Test System features an integrated structure with a built-in variable frequency power module, providing adjustable output power through variable frequency voltage regulation. The frequency can be switched between 45Hz and 55Hz. By employing digital filtering technology, the system effectively avoids interference from power frequency electric fields during testing, fundamentally solving the challenge of accurate measurement under strong electric field interference. Additionally, it is suitable for power supply detection scenarios using a generator after complete power failure.
As power grids continue to develop and line corridor land resources become increasingly scarce, the construction of shared towers has become more prevalent. Consequently, coupling between transmission lines has grown progressively tighter, resulting in stronger interference during power frequency parameter testing. This interference seriously affects both test accuracy and equipment safety.
To address these challenges, our company has developed a new generation of transmission line variable frequency parameter test system. This advanced system integrates a variable frequency test power supply, precision measurement modules, high-speed digital processing chips, and a unique national patent technology for induced voltage circuit resistance. It effectively eliminates the impact of strong interference, ensures the safety of instruments and equipment, and enables convenient, rapid, and accurate measurement of transmission line power frequency parameters.
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Product functions:
1. Positive sequence impedance testing
Measures the positive sequence impedance and impedance angle of transmission lines, providing data support for line parameter analysis and power system calculations.
2. Zero sequence impedance testing
Measures the zero sequence impedance parameters of transmission lines, providing a basis for line ground fault analysis and related protection calculations.
3. Positive sequence and zero sequence capacitance testing
Measures the positive sequence and zero sequence capacitance of transmission lines, obtaining line capacitance parameters to meet transmission line parameter testing requirements.
4. Anti-interference capability against induced voltage and induced current
Designed with anti-interference features for high-voltage line sites with strong induced voltage and induced current, improving test safety and measurement reliability.
5. Frequency conversion and digital filtering anti-interference
Effectively reduces power frequency interference on site through frequency conversion testing and digital filtering technology, improving the accuracy of line parameter measurement.
6. Data storage and safety protection
Supports test data storage, query, and USB export, and is equipped with safety protection features such as grounding detection, facilitating on-site testing and data management.
Product Characteristics:
1、Integrated Structure, Compact and Lightweight: The system features a highly integrated design, consolidating equipment that would traditionally require nearly a truckload into a single integrated host case. It is the smallest and lightest product among its peers in the domestic market, providing a simple and convenient testing solution for field applications.
2、Easy Power Access: The entire measurement process requires only a standard 220V mains power connection, eliminating the inconvenience of accessing 380V power supplies required by conventional measurement methods.
3、Superior Induced Voltage Withstand Capability: Utilizing unique patented technology (Patent No.: 201020687669.X), the system can withstand high induced voltages up to 10,000 volts while maintaining normal operation, with induced current withstand capacity reaching 40A.
4、Variable Frequency Technology for Accurate Measurement: With strong anti-interference capability, the built-in variable frequency power module provides measurement output power at switchable frequencies of 45Hz and 55Hz. Digital filtering technology effectively avoids various power frequency interference signals on site, enabling high-precision, accurate, and reliable measurements.
5、High-Speed Processor for Rapid Results: The system employs a professional fast digital signal processor as its processing core, significantly enhancing computing and processing capacity while ensuring measurement data accuracy.
6、Simple Operation: Wiring is straightforward—positive sequence impedance, zero sequence impedance, positive sequence capacitance, and zero sequence capacitance can all be measured by simply connecting the test leads to the circuit under test. This eliminates the cumbersome wiring changes, inversion issues, and concerns about interference, stability, and accuracy found in existing test methods. It also avoids potential harm to experimental personnel from wiring changes in the presence of induced voltage.
7、Mass Data Storage: Equipped with a real-time clock chip and mass storage, the system can save test results chronologically. Historical records can be viewed and printed as needed.
8、Scientific and Advanced Data Management: Test data can be exported via USB drive and viewed or managed on any PC, allowing users to generate work reports conveniently.
9、Operational Safety Protection: A specially designed grounding detection function assesses whether the system is properly grounded on site. If grounding is incorrect or missing, the system automatically detects this and prohibits operation, ensuring personnel safety and protecting the instrument.
10、Full-Touch LCD Display for Intuitive Operation: The system features a high-end full-touch LCD screen with a large, clear display interface. All operating steps are presented in an intuitive Chinese menu. The entire measurement process can be completed with simple touches, making it an ideal intelligent measurement device.
Technical parameters:
| Kondisi penggunaan | -10℃~40℃ | RH<80% |
| Prinsip anti-interferensi | metode konversi frekuensi | |
| Sumber Daya listrik | AC220V±10%(380V power supply is prohibited) | If powered by a generator, the generator power must be ≥ 3KW |
| Keluaran daya | Maximum output voltage (single-phase) | Voltage: AC200V Current: 8A Accuracy: 0.5% |
| Frekuensi keluaran | 50Hz, 60Hz off peak output | |
| 47.5Hz\52.5Hz 45.0Hz\55.0Hz | ||
| 57.5Hz\62.5Hz 55.0Hz\65.0Hz | ||
| Power (three-phase) | 5KVA | |
| Rentang pengukuran | Capacitance | 0.01~30μF |
| Impedance | 0.01~400Ω | |
| Impedance angle | -180°~+180° | |
| Induced voltage | 0-10kV | |
| Induced current | 0-30A | |
| Resolusi pengukuran | Capacitance | 0.001μF |
| Impedance | 0,001Ω | |
| Impedance angle | 0.001° | |
| Akurasi pengukuran | Capacitance | ≥1μF when，±1% reading ±0.01μF |
| <1μF when，±2% reading ±0.01μF | ||
| Perlawanan | ≥1Ω when，±1% reading ±0.01Ω | |
| ＜1Ω when，±2% reading ±0.01Ω | ||
| Impedance angle | ±0.2°(voltage>1.0V) | |
| ±0.3°(voltage:0.2V~1.0V) | ||
| Anti induced current | Ia+Ib+Ic<30A Accuracy:2% | |
| Anti induced voltage | Ua<10kV;Ub<10kV;Uc<10kV;Accuracy:2% | |
| Dimensions & Weight | (Main chassis) Size mm: 550 * 430 * 530 Weight: 70Kg | |
| (Attachment Box) Size mm: 470 * 340 * 170 Weight: 10Kg | ||
| Ukuran | 100 sets support USB data storage |
Application Scenarios：
1. High-voltage transmission line parameter testing
Used for new, retrofitted, and in-service high-voltage transmission lines, measuring positive sequence and zero sequence impedance and capacitance parameters of the lines.
2. Overhead transmission line testing
Suitable for power-frequency parameter measurement of conventional overhead transmission lines, providing data for line design, acceptance, and operation and maintenance.
3. Power cable parameter testing
Can be used for impedance, capacitance, and other parameter testing of high-voltage power cable lines, meeting cable line parameter measurement requirements.
4. Overhead line – cable hybrid line testing
Suitable for hybrid transmission lines composed of overhead lines and underground cables, capable of performing parameter testing on the entire line.
5. Transmission line acceptance and operation & maintenance
Used for final acceptance testing of new lines, parameter re-measurement after line retrofitting, and parameter verification of in-service lines, providing basic data for power system calculations, relay protection settings, and operational analysis.
FAQ about Transmission Cable Parameter Tester
Q: Can the device handle induced voltage and power frequency interference on the line?
A: Yes. The device is designed to handle induced voltage, induced current, and power frequency interference commonly found at high-voltage line sites. It employs frequency conversion testing and digital filtering technology to improve test stability and accuracy.
Q: Is the device suitable for lines with strong interference?
A: Yes. The device uses frequency conversion testing and digital filtering technology to reduce the impact of power frequency interference on measurement results. It is particularly suitable for complex testing environments such as parallel lines and multi-circuit lines on the same tower.
Q: What core parameters can the device measure?
A: It mainly measures positive sequence impedance, zero sequence impedance, positive sequence capacitance, and zero sequence capacitance, while also providing related test data such as impedance angle.
Q: Why choose our company's UHV-525 Transmission Line Parameter Tester?
A:We have our own factory with over 20 years of production experience. The UHV-525 integrates functions including positive/zero sequence impedance testing, positive/zero sequence capacitance testing, anti-interference capability, and data management, meeting the on-site testing requirements of various transmission lines. At the same time, the device is optimized for complex electromagnetic environments and features convenient operation, comprehensive functionality, and strong field adaptability, providing customers with reliable line parameter testing solutions.
