Product introduction
The YDJ 10kVA AC hipot tester is a high-performance transformer mainly insulated and cooled by oil, widely used in the testing and verification of power equipment. It occupies an important position in the power industry, and its design features and working principle make it highly safe, stable, and long-lasting in high-voltage testing. It usually uses oil as the cooling medium, utilizing the insulation properties and cooling function of oil to ensure effective heat dissipation of internal windings and iron cores.
The AC hipot testers are mainly composed of components such as iron core, winding, oil tank, and insulation sleeve. Among them, the iron core is composed of high magnetic conductivity silicon steel sheets stacked together, forming a magnetic flux closed circuit. The winding is made of copper or aluminum wire wound into a multi-layer cylindrical structure, with low-voltage winding usually on the inner layer and high-voltage winding on the outer layer to ensure good insulation performance. The fuel tank not only serves the purpose of filling oil, but also serves to install other components and protect the interior of the transformer from external influences.
technical parameters
| specifications and models | capacity(kVA) | High Voltage(kV) | high-tension current(mA) | low input voltage | ratio of transformation(high /rites) | temperature rise℃(30 minutes) | |
| tension(V) | electricity(A) | ||||||
| YDJ-15/150 | 15 | 150 | 100 | 400 | 37.5 | 1000 | 10 |
| YDJ-20/150 | 20 | 150 | 133 | 400 | 50 | 1000 | 10 |
| YDJ-30/150 | 30 | 150 | 200 | 400 | 75 | 1000 | 10 |
| YDJ-50/150 | 50 | 150 | 333 | 400 | 125 | 1000 | 10 |
| YDJ-100/150 | 100 | 150 | 667 | 400 | 250 | 1000 | 10 |
| YDJ-50/200 | 50 | 200 | 250 | 400 | 125 | 1000 | 10 |
| YDJ-100/200 | 100 | 200 | 500 | 400 | 250 | 1000 | 10 |
| YDJ-150/200 | 150 | 200 | 750 | 400 | 375 | 1000 | 10 |
| YDJ-200/200 | 200 | 200 | 1000 | 400 | 500 | 1000 | 10 |
| YDJ-300/200 | 300 | 200 | 1500 | 400 | 750 | 1000 | 10 |
| YDJ-50/300 | 50 | 300 | 170 | 400 | 125 | 1000 | 10 |
| YDJ-100/300 | 100 | 300 | 333 | 400 | 250 | 1000 | 10 |
| YDJ-150/300 | 150 | 300 | 500 | 400 | 375 | 1000 | 10 |
| YDJ-200/300 | 200 | 300 | 667 | 400 | 500 | 1000 | 10 |
| YDJ-300/300 | 300 | 300 | 3000 | 400 | 750 | 1000 | 10 |
structural characteristics
1. Oil tank: The interior is filled with transformer oil, which not only serves as a cooling medium but also enhances electrical insulation performance.
2. Iron core: It is usually made of high-quality cold-rolled silicon steel sheets stacked together, with the characteristics of low loss and high magnetic permeability.
3. Winding: Copper or aluminum wire wrapped in high-strength insulation material, divided into high-voltage winding and low-voltage winding.
4. Cooling system: including components such as radiators and fans, to ensure the temperature stability of the transformer during long-term operation.
maintenance and upkeep
1, Daily inspection
1. Appearance inspection: Regularly inspect the transformer casing for damage, leakage, or other abnormal conditions.
2. Oil level check: Check if the oil level in the tank is within the normal range. If the oil level is too low, it is necessary to replenish qualified transformer oil in a timely manner.
2, Regular maintenance
1. Oil quality testing: Regularly take oil samples for analysis, check the moisture content, acid value, impurities and other indicators in the oil. If the oil quality deteriorates, it should be replaced with new oil in a timely manner.
2. Insulation resistance test: Use a megohmmeter to regularly measure the insulation resistance between the winding and ground, as well as between other windings, to ensure that it meets the specified requirements.
3. Cooling system inspection: For equipment equipped with radiators and fans, the working status of these components should be checked to ensure that they are unobstructed and functioning properly.
4. Electrical connection inspection: Tighten all electrical connection points to prevent poor contact or heating caused by looseness.
3, Quarterly/Annual Maintenance
1. Comprehensive cleaning: Remove dust and debris from the surface and surrounding environment of the transformer, especially dust accumulation on the radiator, to ensure good heat dissipation effect.
2. Internal inspection: If necessary, open the fuel tank cover and check the condition of internal components (such as windings, iron cores) to see if there are any corrosion, deformation, or other issues.
3. Functional testing: Conduct a complete functional test, including but not limited to no-load test, load test, etc., to verify whether the various performance indicators of the equipment meet the requirements.
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