H1: XWP2-70 Anti-Pollution Insulator — 70kN, 400mm Creepage, 120kV Lightning Impulse, Brown or Gray Glaze, IEC 60383

The XWP2-70 Anti-Pollution Insulator is a high-performance cap-and-pin disc insulator engineered for medium‑voltage AC overhead transmission and distribution lines operating in heavily polluted environments. Its extended creepage distance of 400mm provides superior pollution flashover performance in the most challenging industrial, coastal, and desert areas.

 

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 70kN and an extended creepage distance of 400mm, the XWP2-70 delivers dependable performance on 33–66 kV lines in industrial zones, coastal regions, and areas with heavy airborne contamination — where standard 300mm creepage insulators may be insufficient.

 

The anti-pollution shed design incorporates an optimised profile that maximises creepage length while maintaining self‑cleaning properties. This ensures reliable insulation performance even under severe pollution conditions, with significantly reduced maintenance requirements.

 

Whether you are upgrading existing lines in contaminated areas or planning new transmission projects in challenging environments, the XWP2-70 Anti-Pollution Insulator offers a durable, high‑performance choice for your infrastructure, with the flexibility to select your preferred glaze color.

 

H2: XWP2-70 Anti-Pollution Insulator — Technical Specifications (Brown & Gray Glaze)

The XWP2-70 Anti-Pollution Insulator is rated with a combined mechanical and electrical (M&E) failing load of 70kN, making it suitable for tangent suspension and light‑tension applications on 33–66 kV overhead lines in contaminated areas.

 

Its extended creepage distance of 400mm — significantly longer than standard 300mm designs — provides superior pollution flashover performance in heavy industrial, coastal, and desert environments. The dry lightning impulse withstand voltage reaches 120kV (positive polarity), and the power frequency wet withstand voltage is 42kV.

 

The nominal diameter is 255mm, with a spacing (height) of 146mm. The anti-pollution shed design incorporates an optimised profile that increases the leakage distance while facilitating self‑cleaning through rainwater runoff.

 

The coupling hardware is the standard 16 ball‑and‑socket type, ensuring full interchangeability with existing fittings per IEC dimensional requirements.

 

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 35kN and an impact strength test of 6Nm to verify mechanical integrity prior to dispatch. Power frequency puncture voltage reaches 120kV, and radio interference voltage (RIV) is exceptionally low at just 50μV at 1000 kHz.

 

H2: XWP2-70 Anti-Pollution Insulator — 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	XWP2-70 (Brown Glaze)	XWP2-70 (Gray Glaze)
Glaze Color	Brown	Gray
Type Designation	XWP2-70 (U70BLP)	XWP2-70 (U70BLP)
Figure / Profile	Anti-Pollution Type	Anti-Pollution Type
Diameter D (mm)	255	255
Spacing H (mm)	146	146
Creepage Distance (mm)	400	400
Coupling Size	16	16
Combined M&E Strength (kN)	70	70
Routine Proof Test Load (kN)	35	35
Impact Strength (Nm)	6	6
Power Frequency Dry Withstand Voltage (kV)	80	80
Power Frequency Wet Withstand Voltage (kV)	42	42
Dry Lightning Impulse Withstand Voltage (kV)	120	120
Power Frequency Puncture Voltage (kV)	120	120
Test Voltage RMS to Ground (kV)	10	10
Maximum RIV at 1000 kHz (μV)	50	50
Net Weight, Approximate (kg)	5.9	5.9
Applied Standard	IEC 60383	IEC 60383

 

Note: The anti-pollution design of the XWP2-70 suspension insulator provides an extended 400mm creepage distance — 100mm longer than standard 300mm designs — delivering superior flashover performance in heavily contaminated environments.

 

The higher electrical ratings (80kV dry, 42kV wet, 120kV lightning impulse) ensure reliable operation under severe pollution conditions. Both brown and gray glazes offer the same outstanding performance.

 

H2: XWP2-70 Anti-Pollution Insulator — Material and Construction

Each XWP2-70 Anti-Pollution Insulator 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 anti-pollution shed profile is carefully engineered to maximise creepage distance (400mm) while maintaining self‑cleaning properties. The extended creepage is achieved through an optimised rib and under‑rib geometry that increases the surface leakage path without significantly increasing overall dimensions.

 

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: XWP2-70 Anti-Pollution Insulator — Applications and Installation

The XWP2-70 Anti-Pollution Insulator is widely deployed on 33 kV to 66 kV AC overhead transmission and distribution lines, as well as substation entry towers, in areas where airborne contamination is a significant concern.

 

The extended 400mm creepage distance makes it particularly suitable for:

• Heavy industrial areas – Where airborne contaminants from factories, power plants, chemical facilities, and mining operations accelerate insulator contamination.
• Coastal regions – Where salt spray and marine aerosols create conductive deposits on insulator surfaces, increasing leakage current and flashover risk.
• Desert and dry regions – Where wind‑borne sand and dust can accumulate on insulators, reducing their pollution flashover performance.
• Urban and suburban corridors – Where traffic emissions and combined industrial pollution create challenging contamination conditions.
• Areas with frequent fog or drizzle – Where moisture combines with deposited contaminants to create conductive film on insulator surfaces.

 

Its 70kN mechanical capacity makes it suitable for both suspension and light‑tension applications. The extended 400mm creepage provides reliable performance even under severe pollution conditions where standard 300mm creepage insulators may fail.

 

Typical application scenarios include:

• 33 kV lines – Single suspension strings in heavily polluted industrial and coastal areas.
• 66 kV lines – Suspension and light‑tension strings where pollution performance is the primary concern.
• Substation entries – Reliable insulation for strain and dead‑end towers in contaminated environments.

 

The standard 16 ball‑and‑socket coupling ensures compatibility with existing clevis pins, yokes, and socket hardware. 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 XWP2-70 Anti-Pollution Insulator can be assembled in strings. Explore our full range of suspension insulators and transmission hardware for more options.

 

H2: XWP2-70 Anti-Pollution Insulator — Quality and Performance Advantages

Compared to standard 300mm creepage disc insulators, the XWP2-70 Anti-Pollution Insulator offers a significant performance advantage: an extended 400mm creepage distance that delivers superior pollution flashover performance in heavy industrial, coastal, and desert environments.

 

The extended creepage represents a 33% increase over standard 300mm designs, significantly reducing the risk of pollution‑related flashovers in contaminated environments. This is complemented by higher electrical ratings:

• Power frequency dry withstand voltage: 80kV (compared to 70kV on standard models)
• Power frequency wet withstand voltage: 42kV (compared to 40kV on standard models)
• Dry lightning impulse withstand voltage: 120kV (compared to 105kV on standard models)

 

At just 5.9kg, the XWP2-70 offers excellent performance for its creepage class, enabling installation on existing structures without significant additional loading.

 

The solid porcelain body ensures excellent dielectric strength, with a power frequency puncture voltage of 120kV. 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 XWP2-70 requires minimal routine maintenance. Every unit undergoes 100% routine testing before dispatch, including:

• Visual and dimensional inspections.
• Routine proof test load verification (35 kN).
• Impact strength testing (6 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 XWP2-70 Anti-Pollution Insulator (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: XWP2-70 Anti-Pollution Insulator — Why Choose Our Product?

Selecting the right suspension insulator for your transmission infrastructure is critical to long‑term grid reliability — especially in contaminated environments where standard insulators may fail due to pollution flashover. Our XWP2-70 Anti-Pollution Insulator 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 pollution‑related flashovers are a leading cause of transmission line outages in industrial and coastal areas — resulting in significant financial losses and public safety risks.

 

That is why the XWP2-70 Anti-Pollution Insulator is specifically engineered with an extended 400mm creepage distance and higher electrical ratings to deliver reliable performance where standard insulators may fail. 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 XWP2-70 Anti-Pollution Insulator (brown or gray) is available with short lead times. Contact us today to discover how the XWP2-70 Anti-Pollution Insulator can strengthen your grid reliability in the most contaminated environments.

 

XWP2-70 Anti-Pollution vs Standard 70kN Insulator — Comparison

Parameter	Standard 70kN Insulator	XWP2-70 (U70BLP) Anti-Pollution	Advantage
Creepage Distance	300 mm	400 mm	+100 mm (+33%)
Dry Withstand Voltage	70 kV	80 kV	+10 kV (+14%)
Wet Withstand Voltage	40 kV	42 kV	+2 kV (+5%)
Lightning Impulse	105 kV	120 kV	+15 kV (+14%)
Net Weight	5.7 kg	5.9 kg	Minimal increase
Best Application	Standard / mild pollution	Heavy industrial, coastal, desert	Superior pollution performance