H1: XWP-300 Anti-Pollution Insulator (U300BP) Suspension — 300kN, 505mm Creepage, 330mm Diameter, 130kV Puncture, 24 Coupling, Brown/Gray Glaze, IEC 60383

The XWP-300 Anti-Pollution Insulator (U300BP) Suspension is the absolute flagship ultimate-strength cap-and-pin disc insulator in our entire product portfolio, engineered for extra‑high‑voltage (EHV) AC overhead transmission lines requiring the highest possible mechanical capacity, superior pollution performance, and maximum physical dimensions.

 

Its 300kN mechanical rating, industry‑leading 505mm creepage distance, and massive 330mm diameter deliver unparalleled performance in the most extreme high-voltage applications.

 

Manufactured in compliance with IEC 60383 international standards, this anti-pollution insulator features a robust porcelain disc body with a standard cap-and-pin design.

 

The unit is available in either brown (standard) or gray (optional) glaze, both offering identical mechanical and electrical performance.

 

With a combined mechanical and electrical (M&E) failing load of 300kN — the absolute highest in the entire product portfolio — an industry‑leading creepage distance of 505mm, and a massive 330mm diameter, the XWP-300 delivers dependable performance on 220 kV and above EHV transmission lines in the most severe contamination zones.

 

It provides a 230kN strength advantage over 70kN anti-pollution insulators, a 200kN advantage over 100kN models, a 180kN advantage over 120kN models, a 140kN advantage over 160kN models, and a 90kN advantage over the 210kN model.

 

The advanced anti-pollution shed design incorporates an optimised multi-rib profile that maximises the industry‑leading 505mm creepage length while maintaining superior self‑cleaning properties.

 

The massive 330mm diameter and 195mm spacing provide the largest surface area in the entire product portfolio for maximum pollution performance and mechanical stability under the most extreme conditions.

 

Whether you are designing 220 kV and above EHV transmission lines for ultra-long spans, critical river crossings, extreme heavy icing zones, or the most demanding strain and dead‑end towers in severely contaminated environments, the XWP-300 Anti-Pollution Insulator Suspension offers the ultimate flagship high‑performance choice for your infrastructure, with the flexibility to select your preferred glaze color.

 

H2: XWP-300 Anti-Pollution Insulator Suspension — Technical Specifications (Brown & Gray Glaze)

The XWP-300 Anti-Pollution Insulator Suspension   is rated with a combined mechanical and electrical (M&E) failing load of 300kN — the absolute highest in the entire product portfolio — making it suitable for tangent suspension, light‑tension, strain, and dead‑end applications on 220 kV and above EHV overhead lines in severely contaminated areas where absolute maximum mechanical strength is required.

 

Its industry‑leading creepage distance of 505mm — 205mm longer than standard 300mm designs and 55mm longer than standard 450mm anti-pollution models — provides superior pollution flashover performance in the most severe industrial, coastal, desert, and heavy-contamination environments. The dry lightning impulse withstand voltage reaches 130kV (positive polarity), and the power frequency wet withstand voltage is 47kV — 2kV higher than standard 45kV anti-pollution models.

 

The nominal diameter is 330mm — the largest in the entire product portfolio — with a spacing (height) of 195mm — also the largest in the entire portfolio. These maximum-in-series dimensions provide the greatest surface area for improved pollution performance, enhanced self‑cleaning, and superior mechanical stability under the highest mechanical loads.

The coupling hardware is the large 24 ball‑and‑socket type, ensuring full interchangeability with existing heavy-duty fittings per IEC dimensional requirements. The size 24 coupling accommodates the absolute highest mechanical loads associated with the 300kN rating.

 

The glaze is available in both brown (standard) and gray (optional). All other technical parameters — mechanical, electrical, and dimensional — are identical between the two color options.

 

Every unit undergoes a routine proof test load of 150kN — the highest in the entire product portfolio — and an impact strength test of 11.3Nm to verify mechanical integrity prior to dispatch. Power frequency puncture voltage reaches 130kV — the highest in the series — and radio interference voltage (RIV) is exceptionally low at just 50μV at 1000 kHz.

 

H2: XWP-300 Anti-Pollution Insulator Suspension — Complete Technical Data (Brown vs. Gray Glaze)

The following table lists all technical parameters for both glaze color options. All values are identical except for the glaze color.

Parameter	XWP-300 (Brown Glaze)	XWP-300 (Gray Glaze)
Glaze Color	Brown	Gray
Type Designation	XWP-300 (U300BP)	XWP-300 (U300BP)
Figure / Profile	Anti-Pollution Type	Anti-Pollution Type
Diameter D (mm)	330	330
Spacing H (mm)	195	195
Creepage Distance (mm)	505	505
Coupling Size	24	24
Combined M&E Strength (kN)	300	300
Routine Proof Test Load (kN)	150	150
Impact Strength (Nm)	11.3	11.3
Power Frequency Dry Withstand Voltage (kV)	85	85
Power Frequency Wet Withstand Voltage (kV)	47	47
Dry Lightning Impulse Withstand Voltage (kV)	130	130
Power Frequency Puncture Voltage (kV)	130	130
Test Voltage RMS to Ground (kV)	10	10
Maximum RIV at 1000 kHz (μV)	50	50
Net Weight, Approximate (kg)	14.8	14.8
Applied Standard	IEC 60383	IEC 60383

 

Note: The flagship anti-pollution design of the XWP-300 suspension insulator combines the absolute highest 300kN mechanical rating in the entire product portfolio with an industry‑leading 505mm creepage distance, the largest 330mm diameter, the tallest 195mm spacing, and size 24 coupling — delivering ultimate mechanical strength, superior flashover performance, and maximum surface area for 220 kV and above EHV applications in the most severe contamination environments.

 

The 85kV dry withstand and 47kV wet withstand voltages exceed lower-rated models. Both brown and gray glazes offer the same outstanding performance.

 

H2: XWP-300 Anti-Pollution Insulator Suspension — Material and Construction

Each XWP-300 Anti-Pollution Insulator Suspension   unit is produced from high‑grade porcelain, fired at over 1,300 °C using the wet process, achieving maximum density and near‑zero porosity.

 

The cap-and-pin design features a porcelain disc body with a standard metal cap and pin. The metal components are manufactured from malleable cast iron and hot‑dip galvanised steel, providing excellent corrosion resistance in diverse atmospheric conditions.

 

The absolute highest-in-portfolio 300kN rating is achieved through advanced mechanical design, premium material selection, and the large size 24 coupling.

 

The advanced anti-pollution shed profile is carefully engineered to maximise the industry‑leading 505mm creepage distance — the longest in the entire product portfolio — while maintaining superior self‑cleaning properties. The massive 330mm diameter — the largest in the portfolio — and 195mm spacing — the tallest in the portfolio — provide the greatest surface area for maximum pollution performance, enhanced self‑cleaning, and superior mechanical stability under the highest mechanical loads.

 

The cement bonding between the porcelain body and metal parts uses high‑quality Portland cement, guaranteeing mechanical stability across extreme thermal cycling.

 

The hard, glossy glaze — available in brown or gray — further enhances self‑cleaning and maintains surface integrity over decades of service. Both glaze colors are applied using the same high‑quality process, ensuring identical durability, hardness, and electrical performance.

 

H2: XWP-300 Anti-Pollution Insulator Suspension — Applications and Installation

The XWP-300 Anti-Pollution Insulator Suspension is the flagship solution for 220 kV and above EHV AC overhead transmission lines, as well as major substation entry towers, critical river crossings, and the most demanding EHV transmission corridors in areas where absolute maximum mechanical strength, superior pollution performance, and maximum physical dimensions are required.

 

The 300kN mechanical rating — the absolute highest in the entire product portfolio — combined with the industry‑leading 505mm creepage distance, massive 330mm diameter, 195mm spacing, and size 24 coupling makes it particularly suitable for:

• 220 kV and above EHV transmission lines with severe pollution – Where the highest system voltages require the largest, strongest insulators with industry‑leading creepage distances and absolute maximum mechanical strength.
• Ultra-long-span major river crossings in contaminated areas – Where conductor weight and tension are at their absolute maximum, combined with severe pollution challenges, requiring the highest possible mechanical rating.
• Extreme heavy icing zones – Where ice accretion adds extreme weight and mechanical stress, often exceeding the capacity of 210kN insulators.
• Major strain and dead‑end towers on EHV corridors – Where absolute maximum mechanical strength is required for critical infrastructure.
• Critical national transmission grid infrastructure – Where system reliability and security of supply are paramount, and maximum mechanical and pollution margins are required.
• EHV substation entries – Where heavy-duty insulation for strain and dead‑end towers in the most contaminated environments is required.
• International EHV projects – Where 24 coupling is the standard for the highest mechanical loads.

 

Its 300kN mechanical capacity makes it suitable for all suspension, strain, and dead‑end applications, with absolute maximum strength margin for ultra-long spans, extreme angle towers, the heaviest icing, and the most extreme loading conditions.

 

The industry‑leading 505mm creepage provides the highest pollution flashover performance available.

 

Typical application scenarios include:

• 220 kV lines – Strain, dead‑end, and heavy-angle towers in severely polluted areas requiring absolute maximum mechanical strength.
• 400 kV and above EHV lines – Major strain and dead‑end towers where maximum mechanical strength and pollution performance are critical.
• Critical river crossings – Ultra-long spans across major waterways requiring the highest mechanical rating.
• National grid backbone infrastructure – Lines where system reliability is paramount and maximum performance margins are required.

 

The large 24 ball‑and‑socket coupling ensures compatibility with existing heavy-duty fittings designed for the highest mechanical loads.

 

The anti-pollution disc design facilitates easy hot‑stick handling for live‑line maintenance, minimizing system downtime during replacements.

 

For higher voltage requirements, multiple units of the XWP-300 Anti-Pollution Insulator Suspension   can be assembled in strings. Explore our full range of suspension insulators and transmission hardware for more options.

 

H2: XWP-300 Anti-Pollution Insulator Suspension — Quality and Performance Advantages

The XWP-300 Anti-Pollution Insulator Suspension   represents the absolute flagship pinnacle of mechanical strength, pollution performance, and physical dimensions in our entire product portfolio — the ultimate engineering achievement for the most demanding EHV applications.

 

Key performance advantages include:

• 300kN mechanical rating – The absolute highest in the entire product portfolio, providing 230kN (329%) more strength than 70kN anti-pollution insulators, 200kN (200%) more than 100kN models, 180kN (150%) more than 120kN models, 140kN (88%) more than 160kN models, and 90kN (43%) more than the 210kN model.
• 505mm industry‑leading creepage distance – The longest in the entire product portfolio, 205mm (+68%) longer than standard 300mm designs and 55mm (+12%) longer than standard 450mm anti-pollution models, ensuring maximum pollution flashover performance.
• 330mm diameter – The largest diameter in the entire product portfolio, providing the greatest surface area for pollution performance and self‑cleaning.
• 195mm spacing – The tallest spacing in the entire product portfolio, providing enhanced mechanical stability and surface area.
• Size 24 coupling – The largest coupling size for the highest mechanical loads.
• 85kV dry withstand voltage – The highest dry withstand in the anti-pollution series, 5kV higher than standard 80kV models.
• 47kV wet withstand voltage – The highest wet withstand in the anti-pollution series, 2kV higher than standard 45kV models.
• 150kN routine proof test – The highest proof load in the entire product portfolio, demonstrating exceptional mechanical integrity.
• 130kV puncture voltage – The highest in the series, demonstrating exceptional dielectric robustness.
• 11.3Nm impact strength – The highest impact resistance in the series.

 

At 14.8kg, the XWP-300 offers an exceptional strength-to-weight ratio for a 300kN anti-pollution insulator — only 2.3kg heavier than the XWP-210 (12.5kg) while delivering a 90kN (43%) higher mechanical rating and industry‑leading 505mm creepage distance.

 

The solid porcelain body ensures excellent dielectric strength. Radio interference voltage (RIV) is exceptionally low at just 50μV at 1000 kHz, ensuring minimal electromagnetic interference with nearby communication systems.

 

With an expected service life exceeding 50 years under normal operating conditions, the XWP-300 requires minimal routine maintenance. Every unit undergoes 100% routine testing before dispatch, including:

• Visual and dimensional inspections.
• Routine proof test load verification (150 kN).
• Impact strength testing (11.3 Nm).
• Power‑frequency wet and dry withstand voltage tests.
• Porosity and temperature‑cycle prototype testing per IEC 60383.

 

Each insulator is individually foam‑cushioned and securely packed in durable wooden crates or corrugated cartons. This prevents damage during transit.

 

We offer flexible shipping arrangements (FOB, CIF, EXW) with lead times of 15–30 days, depending on order quantity.

 

For detailed product datasheets, CAD drawings, or competitive pricing on the XWP-300 Anti-Pollution Insulator Suspension   (brown or gray), please contact our sales team via the inquiry form below.

 

We also provide OEM services and complimentary technical consultation for string assembly design. For installation guidance, refer to our insulator string assembly guide.

 

H2: XWP-300 Anti-Pollution Insulator Suspension — Why Choose Our Product?

Selecting the right suspension insulator for your transmission infrastructure is critical to long‑term grid reliability — especially in 220 kV and above EHV applications with severe contamination, extreme mechanical demands, and the need for absolute maximum performance.

 

Our XWP-300 Anti-Pollution Insulator Suspension is manufactured under stringent quality control protocols at every production stage.

 

From raw material sourcing (high‑grade porcelain clay) to final high‑voltage electrical testing, every step aligns with IEC 60383.

 

We understand that the most demanding EHV transmission projects require the absolute highest levels of mechanical strength, pollution performance, and physical dimensions — where standard 70kN, 100kN, 120kN, 160kN, or even 210kN insulators may not provide adequate safety margins.

 

That is why the XWP-300 Anti-Pollution Insulator Suspension is specifically engineered with a 300kN mechanical rating — the absolute highest in our entire product portfolio — combined with an industry‑leading 505mm creepage distance, the massive 330mm diameter, the tallest 195mm spacing, the largest 24 coupling, and the highest 85kV dry / 47kV wet withstand voltages to deliver absolute flagship performance in the most demanding 220 kV and above EHV applications.

 

Additionally, we offer both brown and gray glaze options to match regional preferences or project specifications.

 

With over a decade of experience in porcelain insulator production, we offer competitive factory pricing, prompt delivery, and dedicated after‑sales technical support.

 

Whether you require a small sample batch for project validation or a full container shipment, the XWP-300 Anti-Pollution Insulator Suspension   (brown or gray) is available with short lead times.

 

Contact us today to discover how the XWP-300 Anti-Pollution Insulator Suspension can strengthen your national grid reliability with the ultimate combination of mechanical strength, pollution performance, and physical dimensions.

 

Flagship Comparison — XWP-210 vs XWP-300

Parameter	XWP-210	XWP-300	Advantage
M&E Strength	210 kN	300 kN	+90 kN (+43%)
Routine Proof Test	105 kN	150 kN	+45 kN
Diameter D	300 mm	330 mm	+30 mm (+10%)
Spacing H	170 mm	195 mm	+25 mm (+15%)
Creepage Distance	450 mm	505 mm	+55 mm (+12%)
Coupling Size	20/24	24	Largest coupling
Dry Withstand Voltage	80 kV	85 kV	+5 kV
Wet Withstand Voltage	45 kV	47 kV	+2 kV
Puncture Voltage	130 kV	130 kV	Identical
Net Weight	12.5 kg	14.8 kg	+2.3 kg (for +90kN +55mm creepage)
Key Advantage	Ultimate strength + dual coupling	Flagship ultimate strength + largest dimensions	43% higher M&E + 12% longer creepage + largest dimensions

 

Anti-Pollution Series — Complete Overview (Ultimate Strength Models)

Parameter	XWP2-160	XWP6-160	XWP-210	XWP-300
M&E Strength	160 kN	160 kN	210 kN	300 kN
Diameter D	300 mm	330 mm	300 mm	330 mm
Spacing H	155 mm	170 mm	170 mm	195 mm
Creepage Distance	450 mm	450 mm	450 mm	505 mm
Coupling Size	20	20	20/24	24
Dry Withstand	80 kV	80 kV	80 kV	85 kV
Wet Withstand	45 kV	45 kV	45 kV	47 kV
Puncture Voltage	120 kV	120 kV	130 kV	130 kV
Proof Test Load	80 kN	80 kN	105 kN	150 kN
Net Weight	8.9 kg	9.1 kg	12.5 kg	14.8 kg
Key Advantage	High strength	Max surface area	Ultimate strength + dual coupling	Flagship ultimate strength + largest dimensions + longest creepage
Best Application	66-110kV / max load	66-110kV / max surface area	110-220kV / absolute max load	220kV+ EHV / national grid / extreme demands