High Mechanical Strength 66kV Composite Post Insulator for Harsh Environments

66kV high mechanical strength composite post insulators are basic parts widely used in medium and high voltage power transmission and distribution systems. They insulate and hold live power parts.

Workers make this composite insulator with epoxy glass fiber pull rods for support and silicone rubber sheds for outer insulation. It is a polymer composite insulator.

Compared with old ceramic and glass insulators, it has clear strong points. It only weighs 1/4 to 1/8 of traditional insulators for the same jobs. Its pull and bend strength of pull rods is over 10 times stronger than high-strength porcelain. Its silicone rubber holds strong water-repellent ability to cut cleaning work.

It also fixes the aging short life of common polymer materials. It works safely for tens of years. It is a new generation product that power grids widely promote.

66kV high mechanical strength composite post insulators use one-piece whole injection molding craft. It builds an all-in-one anti-pollution flashover system combining material, structure, seal and anti-corrosion. It stops pollution flashover, rain flashover and ice flashover faults from the start, and fits all tough working environments.

We use high-performance high-temperature vulcanized silicone rubber for the outer layer. It has great water repellency and water transfer ability.

Silicone rubber has low surface tension and strong film-forming power. Rain drops hit shed surfaces and roll down directly. They cannot form continuous conductive water films to make leak paths in wet places.

This material also has special water transfer performance. It moves water-repellent features to dirty surface layers within 24 to 48 hours. Dust, salt mist and dirty layers all turn water-repellent. It fully removes flashover risks from wet dirt, and keeps steady insulation of equipment from the material level.

We use mixed big and small shed structures that fully meet national high voltage insulation rules. They lengthen creepage distance greatly and lift outer insulation level under 66kV voltage.

The streamlined shed shape holds little dirt and rarely catches ice or snow. It stops conductive ice bridges from thick ice and snow, and avoids flashover caused by ice, rain and snow.

Old porcelain insulators have flat regular surfaces. Our product cleans itself better. Natural wind and rain wash away surface dirt easily and cut dirt buildup chances.

We use large vulcanizing machines for whole injection one-piece molding. Sheds and outer covers connect with no gaps. Only one interface exists between core rod and cover, no split seams or glue layers.

It completely fixes weak points of old extrusion and shed-pushing craft: double interfaces easily take in water, grow old and crack. It blocks wet air, salt mist and dust from reaching inner core rods. It removes hidden troubles like wet core rods, broken insulation and inner electric breakdown. Its structure stays far more stable than traditional glued porcelain insulators.

We use high-strength glass fiber epoxy pull rods as inner load-bearing cores. They own super strong pull, bend and hit resistance. Their mechanical strength is 3 to 4 times higher than strong porcelain.

They absorb vibration well and damp shaking shocks. They bear long-term dynamic mechanical stress: wire weight, strong wind shakes, temperature change bending and ice load. They never crack, break or split in chains like porcelain parts, and fit jobs with heavy mechanical loads.

We forge two-end connecting metal fittings with top-quality steel and coat them with hot-dip galvanization to stop rust. The even thick anti-rust layer resists air rust and salt mist damage, and stops metal parts from rusting, oxidizing or falling loose.

We press-fit metal fittings and core rods with precise machines. They connect tightly and spread force evenly. Stable mechanical performance with small deviation lets equipment run outdoors for years without faults.

The silicone rubber’s water transfer feature keeps dirty surface layers hard to turn conductive. Under the same dirty conditions, its surface insulation resistance is much higher than old porcelain and glass insulators. Its pollution flashover voltage hits over 3 times that of same-level porcelain insulators.

It runs steadily in fog, dew, light rain, thick ice and heavy snow. It stops pollution flashover accidents under normal working voltage.

This product uses solid one-piece composite structures without glued porcelain layers. It never loses insulation power from electro-chemical corrosion. It stops zero-value insulators from forming at the source. It removes risks of insulation aging and inner breakdown. It avoids serious accidents like power tripping, wire breakage and chain splitting caused by zero-value faults of old insulators.

Great water-repellent self-clean power plus optimized shed structures hold little hard dirt. Workers do not need to cut power for yearly cleaning or live-line zero-value tests like they do for porcelain insulators.

It needs no manual cleaning or zero-value checks in its whole service life. It cuts high-altitude work times, lowers labor costs and work safety risks.

Core rods own top mechanical performance with strong pull and bend resistance. They stand earthquakes, strong wind and ice hits. They never have brittle cracks or chain splits common for porcelain insulators. Equipment runs safer and steadier for jobs with heavy loads and strong shakes.

The mixed big-small shed design follows national standards well. It guarantees great outer insulation and electric performance. We press-fit end metal parts to make steady, reliable mechanical performance with small deviation.

It only weighs 1/6 to 1/10 of 66kV porcelain insulators with the same voltage level. Its small size makes moving easy. It cuts transport difficulty and high-altitude work tiredness for laborers.

It also lightens weight pressure on substation frames and power towers. It fits old equipment upgrades and power line building in narrow land paths to save infrastructure costs.

The table below shows the clear match between different use scenarios and the core strengths of 66kV high mechanical strength composite post insulators:

This table lists core raw materials and key electrical & mechanical indexes for the standard 66/72kV model:

All product dimension tolerances follow IEC 61952 standard.

We set this product’s model number following JB/T9683-1999 Rules for Compiling Insulator Product Model Numbers. Its configuration parameters follow JB/T5892-1991 Technical Conditions for Organic Composite Insulators on High-Voltage Lines and JB/T8737-1998 Operation Rules for Composite Insulators on High-Voltage Lines.

For key parameters and setups not clearly defined in the above rules, we adjust and carry out production under GB311.1-1997 Insulation Coordination for High-Voltage Transmission & Transformation Equipment and GB/T5582-1993 Pollution Classes for Outer Insulation of High-Voltage Power Equipment.

We design, produce and test this product under strict international, national and industrial standards with full standardized control. Its performance meets all rules and holds reliable quality.

66kV high mechanical strength composite post insulators are upgraded replacements for old 66kV porcelain and glass post insulators.

It uses high-strength glass fiber core rods, water-transfer silicone rubber and one-piece sealed molding craft. It combines ultra-high mechanical strength, top anti-pollution flashover power, anti-aging ability, maintenance-free design, light weight and high safety.

It fixes many common industry weak points of traditional insulators from the root: zero-value aging, chain breaking, flashover power tripping and high operation costs. It fully fits all complex working scenes: substations, new energy stations, factories, coastal areas, cold zones and high-altitude lands.

With great overall performance and low full-life-cycle costs, it becomes the core support for safe and steady running of 66kV high voltage power transmission and distribution systems. It is the top outer insulation choice for new power systems.