Testador Hipot de óleos isolantes YDJ

CCde alta tensãoportátil

Product Introduction
The YDJ Pointer 5kVA Oil-Immersed AC Test Transformer is a traditional high-voltage testing device that utilizes oil insulation to deliver stable AC withstand voltage tests on electrical equipment. With a 5kVA capacity, it is well-suited for testing medium-sized apparatus such as transformers and cables. The pointer-style analog interface provides clear, real-time readings of voltage and current. The oil-immersed design ensures effective heat dissipation and reliable insulation performance, making this classic tester an ideal choice for industrial and laboratory applications that demand robust dielectric strength validation.

Product Characteristics
Superior Material & Reliable Quality – The high-voltage test transformer features carefully selected materials, ensuring reliable quality and excellent operational stability.
High Voltage Margin & Low Partial Discharge – Designed with a large voltage margin, a compact corona ring, and minimal partial discharge levels for enhanced performance.
Compact & Lightweight Design – Utilizes advanced new insulation materials, resulting in a smaller footprint and lighter weight for improved portability.

Parâmetros técnicos (table)
specifications and models | capacity(kVA) | High Voltage(kV) | high-tension current(mA) | input tension(V) | input electricity(A) | ratio of transformation | temperature rise℃(30 minutes)
YDJ-3/50 | 3 | 50 | 60 | 200 V | 15 A | 500 | 10
YDJ-5/50 | 5 | 50 | 100 | 200 V | 25 A | 500 | 10
YDJ-10/50 | 10 | 50 | 200 | 200 V | 50 A | 500 | 10
YDJ-20/50 | 20 | 50 | 400 | 400 V | 50 A | 500 | 10
YDJ-30/50 | 30 | 50 | 600 | 400 V | 50 A | 500 | 10
YDJ-50/50 | 50 | 50 | 1000 | 400 V | 125 A | 500 | 10
YDJ-5/100 | 5 | 100 | 50 | 200 V | 25 A | 1000 | 10
YDJ-10/100 | 10 | 100 | 100 | 200 V | 25 A | 1000 | 10
YDJ-10/25 | 10 | 25 | 100 | 400 V | 25 A | 1000 | 10
YDJ-20/100 | 20 | 100 | 200 | 400 V | 50 A | 1000 | 10
YDJ-30/100 | 30 | 100 | 300 | 400 V | 75 A | 1000 | 10
YDJ-50/100 | 50 | 100 | 500 | 400 V | 125 A | 1000 | 10
YDJ-15/150 | 15 | 150 | 150 | 100 V | 37.5 A | 1000 | 10
YDJ-20/150 | 20 | 150 | 133 | 400 V | 50 A | 1000 | 10
YDJ-30/150 | 30 | 150 | 200 | 400 V | 75 A | 1000 | 10
YDJ-50/150 | 50 | 150 | 333 | 400 V | 125 A | 1000 | 10
YDJ-100/150 | 100 | 150 | 667 | 400 V | 250 A | 1000 | 10
YDJ-50/200 | 50 | 200 | 250 | 400 V | 125 A | 1000 | 10
YDJ-100/200 | 100 | 200 | 500 | 400 V | 250 A | 1000 | 10
YDJ-150/200 | 150 | 200 | 750 | 400 V | 375 A | 1000 | 10
YDJ-200/200 | 200 | 200 | 1000 | 400 V | 500 A | 1000 | 10
YDJ-300/200 | 300 | 200 | 1500 | 400 V | 750 A | 1000 | 10
YDJ-50/300 | 50 | 300 | 170 | 400 V | 125 A | 1000 | 10
YDJ-100/300 | 100 | 300 | 333 | 400 V | 250 A | 1000 | 10
YDJ-150/300 | 150 | 300 | 500 | 400 V | 375 A | 1000 | 10
YDJ-200/300 | 200 | 300 | 667 | 400 V | 500 A | 1000 | 10
YDJ-300/300 | 300 | 300 | 3000 | 400 V | 750 A | 1000 | 10

Comparison of Advantages and Disadvantages of Various Test Transformers
Oil immersed test transformer — Advantages: Strong insulation performance, suitable for high voltage levels; High heat dissipation efficiency, capable of long-term continuous operation; Low cost, mature technology, and high market penetration rate. — Disadvantages: Large volume, heavy weight, inconvenient transportation and installation; Regular maintenance required (oil change, leak detection), risk of oil leakage; limited in high environmental friendliness requirement scenarios.
Dry type test transformer — Advantages: Small size, light weight, easy to move and use outdoors; No oil leakage risk, good environmental friendliness; Easy maintenance. — Disadvantages: Insulation performance affected by humidity; Limited heat dissipation, not suitable for long-term high load; Cost higher than oil immersed in some cases.
Inflatable (SF6) test transformer — Advantages: High insulation strength, miniaturized design; Strong anti-pollution ability; Low partial discharge. — Disadvantages: Very high cost; SF6 requires special treatment and strict leakage monitoring; Maintenance needs professional equipment.

Main application scenarios

• Power system testing: testing transformers, switchgear, relays, and transmission lines using high voltage and high current parameters to detect performance under load and overload conditions.
• Insulation material testing: voltage withstand tests on insulation materials (cables, insulators, transformer windings) to verify reliability in working environments.
• Voltage withstand test: partial discharge and leakage current tests to evaluate insulation level and regulatory compliance.
• Fault simulation testing: short circuit, overvoltage, and frequency response testing to check stability and protective performance under fault conditions.
• Electronic device testing: testing components or circuits in liquid media to evaluate reliability and durability under immersion.
• Mechanical engineering applications: simulate wear and friction in lubricating or hydraulic oil environments to assess component performance and lifespan.
• Materials science research: performance testing in specific environments (corrosion resistance, high temperature) within a closed oil-immersed environment.
• Automotive industry applications: evaluate components that must withstand lubricating oil or preservative conditions.
• Medical equipment testing: simulate physiological fluid environments for compatibility and safety evaluation.

Frequently Asked Questions

• Q: What is the most easily overlooked fatal detail before operation? A: The shell and iron core must be grounded at one point and grounding resistance should not exceed 0.5 Ω. Also ensure the X terminal of the low-voltage winding (input side) is connected; check insulation oil level to avoid exposed high-voltage leads.
• Q: The voltage cannot rise during the experiment but the voltage regulator has reached its maximum. Why? A: Common reasons include: (1) excessive voltage drop on the power supply line (thin wire or long distance) resulting in insufficient input voltage; (2) severe breakdown of the test sample forming a short circuit with sharply increased leakage current; (3) poor carbon brush contact or broken winding of the voltage regulator.

Caractéristiques / Spécifications techniques

• Modèle principal: YDJ Pointer (ex. YDJ-5/50 for 5 kVA)
• Capacité: 5 kVA (pour le modèle 5kVA)
• Tension de sortie haute: 50 kV (pour YDJ-5/50)
• Courant haute tension: 100 mA (pour YDJ-5/50)
• Tension d'entrée (basse): 200 V (typique selon modèle)
• Courant d'entrée: 25 A (pour YDJ-5/50)
• Rapport de transformation: typ. 500~1000 selon modèle
• Montée en température: typ. 10 ℃ (30 minutes, selon modèle)
• Isolation: huile immergée pour dissipation thermique et performance d'isolation fiable
• Affichage: pointer analogique pour lecture en temps réel de la tension et du courant