Say Goodbye To Leakage Hazards: How Can Pre-insulated Bushings Usher In A New Era Of Oil-free Power Grids?

When inspecting substations, the most troublesome issues are oil leaks in bushings or aging of the paper insulation. Technology has iterated rapidly in recent years, and many projects have begun large-scale replacements with new equipment.

The Structural Logic of Breaking Free from the "Oil" Constraint

The core of the new technology that everyone is talking about now lies in the fact that pre insulated sleeve has achieved oil-free casing. This isn't just about using less oil; it's about eliminating oil at the source. The old design, where porcelain bushings were filled with insulating oil, inevitably led to problems over time, such as leaks caused by aging seals. Switching to this pre insulated junction sleeve model, which uses solid insulation materials internally, directly reduces fire hazards and environmental pollution to a minimum.

How exactly does this technology work?

The structural logic of this bushing is quite interesting; let's break it down:

• Inner Insulation Layer: Uses epoxy resin impregnated fibers or composite materials to form a dense solid skeleton.

• Potential Distribution: The internal capacitor bank design is very precise, controlling the uniform distribution of the electric field, eliminating the need for oil as a charge medium.

• Outer Shell Material: Abandoning fragile ceramic materials, a silicone rubber composite outer shell is used, offering superior resistance to contamination.

Worry-Free Operation and Maintenance

After using the insulated joint sleeve, the workload of the maintenance team has indeed been significantly reduced. Previously, they had to constantly monitor the oil level gauge and regularly take oil samples for testing, fearing the presence of acetylene or excessive moisture. Now, this dry structure eliminates these hassles. Because there is no flowing medium inside, the installation angle is also much more flexible; horizontal or angled installation is no problem.

A Visually Improving System Reliability

Substations prioritize stability, and this oil-free trend is perfectly aligned. Pre-insulated bushings exhibit far greater physical stability than oil-paper insulation in extreme low-temperature or high-altitude environments. Since there is no risk of bursting due to sudden internal pressure increases, the operating environment of the entire transformer has become much cleaner.