YDJ Oil Immersed AC/DC Hipot Test Set
Product Introduction
YDJ Oil Immersed AC/DC Hipot Test Setfeatures a compact and lightweight design with high integration and versatile functionality. It is highly portable and user-friendly, making it especially suitable for AC/DC withstand voltage testing of electrical equipment, components, and insulating materials in power systems, industrial enterprises, mining facilities, and research institutions. This series is an essential solution for high-voltage testing applications.
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พารามิเตอร์ผลิตภัณฑ์
| 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-3/50 | 3 | 50 | 60 | 200 | 15 | 500 | 10 |
| YDJ-5/50 | 5 | 50 | 100 | 200 | 25 | 500 | 10 |
| YDJ-10/50 | 10 | 50 | 200 | 200 | 50 | 500 | 10 |
| YDJ-20/50 | 20 | 50 | 400 | 400 | 50 | 500 | 10 |
| YDJ-30/50 | 30 | 50 | 600 | 400 | 50 | 500 | 10 |
| YDJ-50/50 | 50 | 50 | 1000 | 400 | 125 | 500 | 10 |
| YDJ-5/100 | 5 | 100 | 50 | 200 | 25 | 1000 | 10 |
| YDJ-10/100 | 10 | 100 | 100 | 400 | 25 | 1000 | 10 |
| YDJ-10/25 | 10 | 25 | 400 | 400 | 25 | 1000 | 10 |
| YDJ-20/100 | 20 | 100 | 200 | 400 | 50 | 1000 | 10 |
| YDJ-30/100 | 30 | 100 | 300 | 400 | 75 | 1000 | 10 |
| YDJ-50/100 | 50 | 100 | 500 | 400 | 125 | 1000 | 10 |
| 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 |
Visual comparison
Comparison Dimension | Oil-immersed test transformer | Dry-type (epoxy-cast) test transformer | SF₆ Inflatable Test Transformer | Series Resonance Testing Device (often confused) |
insulating medium | Transformer oil (mineral oil) | Epoxy resin solid | Sulfur hexafluoride (SF₆) gas | Dry-type/Oil-immersed reactor combination |
Maximum voltage per unit | Extremely high voltage (up to over 1500 kV) | Lower voltage (generally ≤35 kV) | Higher (up to 300 kV) | High (dependent on resonant boost) |
ปริมาณและน้ำหนัก | Heaviest and largest (requires fuel tank) | Lightweight and compact | Mild (gas pressure vessel, but with high process requirements) | Ultra-lightweight (easy to transport, ideal for on-site use) |
Cooling Performance | Excellent (oil circulation cooling) | Disadvantages (natural cooling, prone to overheating) | Generally (slow gas convection) | Shortage (short working hours, intermittent use) |
Security (Fire) | There are risks (oil spill is flammable). | Intrinsic Safety (non-flammable, non-explosive) | Non-flammable (though SF₆ decomposition products are toxic) | Safety (oil-free or low-oil) |
Maintenance Cost | High (requires regular filtration and oil quality testing) | Extremely low (maintenance-free, moisture and dust resistant) | High pressure (requires regular leak detection and gas purity testing) | Medium (requires maintenance of reactors and voltage regulators) |
Burst discharge level | Higher (due to impurities in the oil) | Extremely low (solid-sealed, suitable for precision testing) | Extremely low (insulated with pure gas) | Extremely low (continuous sine wave, minimal interference) |
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Product Characteristics
1、The high-voltage test transformer features premium material selection, ensuring reliable quality and stable performance.
2、It offers a wide voltage margin and is designed with a compact corona ring and minimal partial discharge.
3、Utilizing advanced insulation materials, the transformer achieves a compact structure and lightweight design.
Advantages
Efficient cooling: Transformer oil has good thermal conductivity and can effectively cool the internal components of transformers.
Good insulation: Transformer oil has excellent insulation performance, which can prevent electrical faults and short circuits.
Durability: Oil immersed transformers typically have a long service life and can be used for decades with proper maintenance.
High load capacity: capable of withstanding high electrical loads, suitable for various high-power applications.
Main application areas
Power system testing: used for high-voltage testing of transformers, switchgear, distribution equipment, etc., to ensure their safety and reliability in actual operation.
Research and Laboratory: Used for testing and developing high-voltage electrical equipment in research experiments in fields such as electrical engineering and materials science.
Insulation testing of electrical equipment: Conduct insulation strength testing on cables, insulation materials, etc. to evaluate their performance and reliability.
Industrial automation and control systems: used in industrial production to debug and test the electrical performance of automation equipment.
Electrical safety testing: Conduct safety testing on various electrical equipment to ensure compliance with national and industry standards.
Electric power training and education: used for teaching and practical operation in vocational training and electrical engineering courses in higher education institutions.
Frequently Asked Questions
Q: Why is it necessary to use oil immersed transformers instead of ordinary dry-type transformers for high-voltage testing?
Answer: Ordinary transformers focus on "energy conversion", while test transformers focus on "short-term high-voltage output". Oil immersed transformers use insulating oil to simultaneously serve the dual functions of high voltage insulation and circulating heat dissipation. In the experiment, it can withstand extremely high internal electric field strength (such as power frequency withstand voltage), and the oil gap design can effectively suppress partial discharge, which cannot be achieved by ordinary dry transformers.
Q: What is the difference between a 50Hz test transformer and a series resonant device?
Answer: The test transformer directly boosts the voltage, has a large volume and heavy weight, and requires a very large capacity when the capacitance of the tested object is large; Series resonance is a resonant boost method that uses a reactor to compensate for the capacitive current, and the power supply capacity only needs to be 1/Q of the test capacity (Q is the quality factor). Conclusion: Short distance cables and test transformers for small and medium-sized switchgear are cost-effective; It is recommended to use series resonance for long cables and large generators, otherwise you will have to buy a super large capacity test transformer weighing tens of tons.
