Product introduction
Test transformers are essential testing equipment for the detection and preventive testing of power equipment. With the development of China's power industry, the voltage level requirements for test transformers are becoming increasingly high. However, traditional test transformers are increasingly unable to meet the requirements of on-site work in terms of volume, weight, and performance. With the progress of basic scientific research in China, the application of new materials and processes has pushed the new medium sulfur hexafluoride gas into the field of power equipment applications. Due to its excellent insulation and arc extinguishing properties, as well as non flammability, sulfur hexafluoride gas has been widely used as a new insulation medium.
After years of effort, our company has successfully developed the YDQ Gas-type AC DC Hipot Tester that is small in size, light in weight, and free of oil pollution. The technical performance of the product has been greatly improved, making it particularly suitable for on-site work and frequent movement conditions.
Technical parameters
|
Voltage class |
10kV-300kV |
|
Capacity range |
1-500kVA |
|
Impedance voltage |
≤8% |
|
No-load current |
＜7% |
|
Product type |
AC, AC&DC, AC cascade, AC DC cascade. |
Main product specifications
| specifications and models | capacity(kVA) | High Voltage(kV) | High tension current(mA) | low input voltage converter | bend-beam-rheometer | temperature rise℃(30 minutes) | |
| voltage(V) | electricity(A) | ||||||
| YDQ-20/150 | 20 | 150 | 133 | 400 | 53 | 1500 | 10 |
| YDQ-30/150 | 30 | 150 | 200 | 400 | 80 | 1500 | 10 |
| YDQ-50/150 | 50 | 150 | 333 | 400 | 132 | 1500 | 10 |
| YDQ-100/150 | 100 | 150 | 667 | 400 | 263 | 1500 | 10 |
| YDQ-50/200 | 50 | 200 | 250 | 400 | 132 | 2000 | 10 |
| YDQ-100/200 | 100 | 200 | 500 | 400 | 263 | 2000 | 10 |
main purpose of Gas-type AC DC Hipot Tester
YDQ AC DC Hipot Testers are the preferred equipment for conducting power frequency withstand voltage tests.
1. Handover test of high-voltage electrical equipment: Conduct insulation strength assessment on newly installed power equipment (such as cables, transformers, GIS combination devices, high-voltage switches, etc.) after installation.
2. Preventive testing: Regularly inspect electrical equipment in operation to determine its insulation aging condition and promptly identify potential hazards.
3. Research on insulation materials: Used in the field of scientific research to study the performance of various insulation materials under high electric fields.
4. High voltage laboratory: as the basic equipment for generating high voltage.
Applicable scenarios of YDQ Gas-type AC DC Hipot Tester
1. Frequent movement, wilderness, mountainous areas, high altitude, and substation sites (by car/helicopter)
2. Adverse environments such as high altitude, coastal high humidity, extreme cold and heat
3. GIS, SF electrical appliances, and cable on-site withstand voltage (matched with the same medium)
4. Oil free, fire-resistant, explosion-proof, and clean requirements (laboratory, underground, chemical, coal mine)
5. High precision, low partial discharge testing (scientific research, new product development)
6. Short term rapid and multiple start stop on-site tests
Tested equipment for AC DC hipot tester
|
Subject equipment |
Main testing objectives |
|
Power transformer |
Test the voltage resistance performance of windings and related insulation structures |
|
High-voltage cable |
Check the AC withstand voltage capability of the main insulation of the cable |
|
High-voltage switchgear |
Inspect the insulation performance between phases and to ground |
|
Circuit breakers, isolating switches |
Test the voltage resistance performance of relevant insulation parts |
|
Current transformer, voltage transformer |
Inspect the winding and ground insulation |
|
Insulators and sleeves |
Test the electrical withstand capability of insulation components |
|
High voltage motors and generators |
Inspect the main insulation of stator windings and other parts |
|
Insulation materials and electrical components |
Conduct the prescribed withstand voltage test according to product standards |
Core features of YDQ Gas-type AC DC Hipot Tester
1. Insulation/cooling: SF ₆ gas, high insulation strength, non combustible, clean
2. Weight/Volume: lightest, 40% -65% lighter than the same grade of oil
3. Environmental adaptation: Strong (humidity, dust, high altitude, high and low temperature)
4. Maintenance: Basic maintenance free, no oil, no leakage, no need to change oil
5. On site: No need to stand still after handling, can be used immediately
6. Cost: Highest (SF ₆+sealing process+recycling)
7. Environmental Protection: SF ₆ is a strong greenhouse gas, and leaks need to be professionally recovered
AC DC Hipot Tester Selection Guide
Selecting an AC DC hipot tester requires more than matching the rated voltage. Buyers should evaluate the electrical characteristics of the test object and the conditions under which testing will be performed.
Rated output voltage: Select a voltage rating that covers the required test voltage specified by the applicable standard.
Rated capacity: Calculate the required capacity based on the test current, load characteristics, and intended test duration.
Test object capacitance: Capacitive loads can significantly affect the current and power required during AC testing.
Output configuration: Confirm whether AC output, DC output, or both are required, and verify the available functions for the selected model.
Portability: For field testing at substations or remote sites, consider equipment weight, dimensions, transportation, and installation requirements.
Protection functions: Check the availability of overcurrent protection, overvoltage protection, emergency shutdown, and other applicable safety features.
fAQ
1. What is the YDQ gas-type AC DC hipot tester?
Gas-type AC DC hipot tester is a high-voltage testing equipment that uses gas as the insulation medium, mainly used to generate the high voltage required for testing, and can be used for power frequency withstand voltage testing of electrical equipment. In non partial discharge products, it can also be used for partial discharge testing.
2. What tests are inflatable AC DC hipot testers mainly used for?
Mainly used for power frequency withstand voltage test; Inflatable non partial discharge test transformers can also be used for partial discharge testing, suitable for electrical equipment factory testing, acceptance testing, and preventive testing.
3. What authentication documents can be provided?
According to customer needs, we can provide:
CE Certificate
ISO9001 Certificate
Factory Test Report
Calibration Certificate
Third party inspection report
Certificate of Origin, etc
4. How can after-sales service be guaranteed?
We provide complete after-sales support services, including equipment installation guidance, operation training, technical consultation, remote fault diagnosis, and spare parts supply. The YDQ gas-type AC DC hipot tester undergoes strict testing before leaving the factory and comes with detailed English manuals and test reports. For overseas customers, we have rich export experience and can quickly assist in solving problems through video conferencing, remote technical support, and other methods to ensure the long-term stable operation of equipment.
5. Do you have rich export experience?
Yes. Our inflatable AC DC hipot testers have been exported to multiple countries and regions in Asia, the Middle East, Africa, Europe, and South America, and are widely used in power companies, substations, testing institutions, and industrial enterprises. We are familiar with international electrical standards, export packaging requirements, and various trade documents, and can provide customers with safe and reliable transportation solutions and professional project support to help equipment be delivered smoothly and put into use.
Professional technical consultation and selection support
Before purchasing inflatable test transformers, users can consult Wuhan UHV about equipment parameters, test plans, and supporting configurations to reduce problems caused by insufficient capacity, mismatched models, or improper selection of test methods.
Technical consulting mainly includes:
Experimental requirement analysis: Based on power transformers, high-voltage cables GIS,GIL, Analyze the specific conditions of the tested objects such as transformers and the applicable testing equipment.
Technical parameter confirmation: Assist in verifying parameters such as rated output voltage, capacity, output current, input power supply, and test duration.
Suggestions for supporting equipment: According to project requirements, confirm whether a voltage control console, measuring device, partial discharge detection equipment, and related protective devices are needed.
On site application guidance: Provide technical advice on issues such as test sites, mobile operations, wiring methods, and power supply conditions.
After-sales service
Technical consultation: Answering technical questions related to equipment operation, parameter settings, and usage.
Troubleshooting: Assist in analyzing the cause of the malfunction based on its symptoms, and guide the implementation of basic inspections.
Repair service: Submit a repair request according to the after-sales process, and confirm the scope of repair and processing cycle.
Spare parts and maintenance: Consult relevant spare parts and maintenance plans based on equipment configuration and actual situation.
On site support: If an engineer is required to be present, the service scope, response time, travel expenses, and specific arrangements should be confirmed in advance.
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