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You Are Here: Home > NEWS > Oil Purifier Technology

Oil Purifier Technology

How Does an Online Transformer Oil Purifier Work Without Power Interruption?

Writer: Kaiqian Oil Purifier Release time:2025-07-22 16:27 Clicks:

In power transmission systems, the quality of transformer oil plays a crucial role in ensuring insulation strength and long-term reliability.  However, over time, moisture ingress, oxidation, and operational stress can cause contamination in the oil—introducing water, gas, and fine particulates that compromise its performance.

The online transformer oil purifier is engineered to operate without interrupting the transformer’s service.  Connected via a bypass loop, it continuously circulates and purifies oil while the transformer remains energized, eliminating the need for shutdown.

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This system integrates multi-stage filtration and vacuum dehydration technology.  Initially, suspended solids and sludge are captured through coarse and fine filters.  The pre-filtered oil is then gently heated and introduced into a vacuum chamber, where dissolved moisture and gases are vaporized and removed under negative pressure.  This restores the oil’s dielectric strength and improves its overall cleanliness.

Advanced models feature smart PLC control, temperature regulation, pressure protection, and automatic alarms—ensuring safe and efficient unattended operation.  Designed for use with high-voltage transformers (66kV–500kV), OLTCs, and similar equipment, the system is widely used in utilities, substations, renewable energy fields, and heavy industry.

Key Benefits:

Non-stop purification while transformer remains in service;

Reduces moisture content to below 5 ppm, improving breakdown voltage to ≥60 kV;

Removes fine particles, acids, and dissolved gases for enhanced oil quality;

Modular and adaptable design suitable for various transformer types;

Reduces maintenance downtime and extends oil and equipment life cycle.


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