Transformer Oil Regeneration Machine – YUNENG YZS Series

Transformer oil is a critical insulating and cooling medium for power transformers and other high-voltage electrical equipment. During long-term operation, oil is inevitably contaminated by moisture, solid particles, oxidation by-products (acids, sludge, peroxides), and dissolved gases. These contaminants degrade dielectric strength, thermal conductivity, and chemical stability, increasing the risk of insulation failure, equipment damage, and unplanned outages.

The YUNENG YZS Series Transformer Oil Regeneration Plant provides a professional and sustainable solution to this problem. Instead of replacing large volumes of oil, the system removes harmful contaminants at both physical and chemical levels, restoring oil performance to meet IEC and ASTM standards. This approach significantly reduces operating costs, minimizes hazardous waste generation, and extends both oil and transformer service life.

YZS Transformer Oil Regeneration Machine Process Overview

The regeneration process typically includes the following stages:

1. Precision Filtration: High-efficiency filters remove solid contaminants such as dust, metal particles, carbon deposits, and insulation debris.

2. Vacuum Dehydration: Free and dissolved moisture is removed under high vacuum conditions. Moisture reduction is essential for restoring insulation resistance and preventing dielectric breakdown.

3. Vacuum Degassing: Dissolved gases such as oxygen, nitrogen, and combustible gases are extracted, slowing oil oxidation and reducing the risk of partial discharge.

4. Adsorption Regeneration: Fuller’s earth and specialized adsorbents remove acids, sludge, resins, and oxidation products, restoring oil acidity, dielectric strength, viscosity, and color.

YZS Transformer Oil Regeneration MachineTechnical Specifications

Item	Name of Parameter	Unit	YZS-3000	YZS-6000	YZS-9000	YZS-12000
Technical parameters of the equipment	Nominal flow capacity	L/h	3000	6000	9000	12000
	Working pressure	Mpa	≤0.35
	Vacuum degree	Mpa	-0.04～-0.095
	Heater temperature range	℃	40℃-300℃
	Working noise	dB(A)	≤85
	Filter precision	µm	≤3
	Total power	kW	23	25	30	34
Oil treatment index	Dielectric loss factor（90℃）	/	≤0.005
	Acid value	mgKOH/g	≤0.03

Key Advantages of YZS Transformer Oil Regeneration Machine

1. Restores Oil Performance to Near-New Standards

Unlike conventional oil filtration systems, the YZS regeneration plant removes both physical and chemical contaminants. After treatment:

• Breakdown voltage can be restored from below 25 kV to over 70 kV
• Acidity (TAN) reduced to ≤ 0.03 mg KOH/g
• Moisture content lowered to ≤ 10 ppm

This enables the oil to fully recover its insulation and cooling performance, comparable to new oil.

2. Significantly Reduces Operating Costs

Oil replacement involves high costs for new oil purchase, waste oil disposal, logistics, and transformer downtime. Oil regeneration typically costs only 20–30% of full oil replacement, while extending oil service life by 3–5 times.

For large power transformers containing 10,000–50,000 liters of oil, a single regeneration cycle can save hundreds of thousands of dollars. On-site regeneration further eliminates transportation and storage costs.

3. Environmentally Friendly and Regulation-Compliant

Waste transformer oil is classified as hazardous waste. Regeneration allows over 95% of degraded oil to be recycled, greatly reducing environmental impact and disposal risks.

The process supports compliance with international environmental regulations such as EU REACH and U.S. EPA (RCRA) requirements, while also reducing carbon emissions associated with new oil production.

4. Enhances Transformer Reliability and Service Life

Clean, regenerated oil slows insulation aging and internal corrosion, reducing the risk of:

• Partial discharge
• Internal short circuits
• Thermal and dielectric failures

Utilities using regular oil regeneration report:

• 40–60% reduction in transformer maintenance frequency
• 30–50% extension in transformer service life

5. Flexible Design and Easy Operation

The YZS series is suitable for:

• Different oil types (mineral, synthetic, natural ester)
• Various transformer sizes, from distribution to power transformers

Mobile and on-site configurations allow offline or online regeneration with minimal interruption. Automated PLC control systems enable real-time monitoring of oil parameters, ensuring stable performance with minimal operator intervention.

Applications of YZS Transformer Oil Regeneration Machine