H1: XWP3-120 Anti-Pollution Insulator (U120BLP) Suspension — 120kN, 450mm Creepage, 120kV Lightning Impulse, Compact Lightweight Design, Brown/Gray Glaze, IEC 60383

The XWP3-120 Anti-Pollution Insulator (U120BLP) Suspension is the ultimate high-performance cap-and-pin disc insulator in our anti-pollution series, engineered for medium‑voltage AC overhead transmission and distribution lines requiring maximum mechanical capacity, superior pollution performance, and compact light weight construction.

 

Its ultra-long creepage distance of 450mm and 120kN mechanical rating are combined in an exceptionally compact 146mm spacing and lightweight 8.3kg package.

 

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 120kN and an ultra-long creepage distance of 450mm, the XWP3-120 delivers the highest mechanical strength in the anti-pollution series — providing a 50kN strength advantage over 70kN anti-pollution insulators and a 20kN advantage over 100kN models — all while maintaining a compact 146mm spacing and weighing just 8.3kg.

 

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

 

The 280mm diameter and industry-leading compact 146mm spacing ensure excellent pollution performance and mechanical stability while minimising overall string length and tower loading.

 

Whether you are designing lines for the most demanding strain towers, long spans in severely contaminated areas, or high-load applications requiring maximum mechanical strength with minimal tower loading, the XWP3-120 Anti-Pollution Insulator Suspension offers the ultimate compact, high‑performance choice for your infrastructure, with the flexibility to select your preferred glaze color.

 

H2: XWP3-120 Anti-Pollution Insulator Suspension — Technical Specifications (Brown & Gray Glaze)

The XWP3-120 Anti-Pollution Insulator Suspension is rated with a combined mechanical and electrical (M&E) failing load of 120kN — the highest in the anti-pollution series — making it suitable for tangent suspension, light‑tension, strain, and dead‑end applications on 33–66 kV overhead lines in severely contaminated areas where maximum mechanical strength is required.

 

Its ultra-long creepage distance of 450mm — 150mm longer than standard 300mm designs — provides superior pollution flashover performance in the most severe industrial, coastal, desert, and heavy-contamination environments. The dry lightning impulse withstand voltage reaches 120kV (positive polarity), and the power frequency wet withstand voltage is 45kV — 3kV higher than 70kN anti-pollution models.

 

The nominal diameter is 280mm, with a compact spacing (height) of 146mm — the shortest in the 120kN anti-pollution class — allowing for reduced string length and lower tower loading while maintaining the same 450mm creepage distance.

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 60kN and an impact strength test of 10Nm 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: XWP3-120 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	XWP3-120 (Brown Glaze)	XWP3-120 (Gray Glaze)
Glaze Color	Brown	Gray
Type Designation	XWP3-120 (U120BLP)	XWP3-120 (U120BLP)
Figure / Profile	Anti-Pollution Type	Anti-Pollution Type
Diameter D (mm)	280	280
Spacing H (mm)	146	146
Creepage Distance (mm)	450	450
Coupling Size	16	16
Combined M&E Strength (kN)	120	120
Routine Proof Test Load (kN)	60	60
Impact Strength (Nm)	10	10
Power Frequency Dry Withstand Voltage (kV)	80	80
Power Frequency Wet Withstand Voltage (kV)	45	45
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)	8.3	8.3
Applied Standard	IEC 60383	IEC 60383

 

Note: The advanced anti-pollution design of the XWP3-120 suspension insulator combines the highest 120kN mechanical rating in the series with an ultra-long 450mm creepage distance and the most compact 146mm spacing — delivering maximum mechanical strength, superior flashover performance, and minimal string length.

 

The 60kN routine proof test and 10Nm impact strength demonstrate exceptional mechanical robustness. Both brown and gray glazes offer the same outstanding performance.

 

H2: XWP3-120 Anti-Pollution Insulator Suspension — Material and Construction

Each XWP3-120 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 highest-in-series 120kN rating is achieved through enhanced mechanical design and premium material selection.

 

The advanced anti-pollution shed profile is carefully engineered to maximise creepage distance (450mm) while maintaining superior self‑cleaning properties. The 280mm diameter provides additional surface area for improved pollution performance, while the compact 146mm spacing — the shortest in the 120kN anti-pollution class — minimises overall string length.

 

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: XWP3-120 Anti-Pollution Insulator Suspension — Applications and Installation

The XWP3-120 Anti-Pollution Insulator Suspension is widely deployed on 33 kV to 66 kV AC overhead transmission and distribution lines, as well as substation entry towers, in areas where maximum mechanical strength, severe contamination conditions, and reduced tower loading are all critical priorities.

 

The 120kN mechanical rating — the highest in the anti-pollution series — combined with the ultra-long 450mm creepage distance and compact lightweight design makes it particularly suitable for:

• Heavy industrial zones with strain and dead‑end towers – Where airborne contaminants create severe pollution conditions, and maximum mechanical strength is required for strain and dead‑end configurations, with minimal string length.
• Coastal and marine environments with extreme wind loads – Where heavy salt spray combines with extreme wind loads, requiring the highest mechanical capacity and maximum pollution performance with reduced tower loading.
• Long-span river crossings in contaminated areas – Where conductor weight and tension are maximised, combined with severe pollution challenges and the need for compact string length.
• Heavy icing zones with severe contamination – Where ice accretion adds significant weight and mechanical stress, requiring maximum mechanical rating and pollution performance.
• Critical transmission corridors with tower loading concerns – Where system reliability is paramount, and both mechanical and pollution margins must be maximised while minimising tower loading.
• Retrofit and upgrade projects – Where upgrading from 70kN or 100kN to 120kN capacity is required without increasing string length or tower loading.

 

Its 120kN mechanical capacity makes it suitable for suspension, light‑tension, strain, and dead‑end applications, with maximum strength margin for long spans, angle towers, heavy icing, and extreme loading conditions. The compact 146mm spacing minimises overall string length and tower loading.

 

Typical application scenarios include:

• 33 kV lines – Double suspension strings or strain applications in severely polluted industrial and coastal areas requiring maximum mechanical strength with compact string design.
• 66 kV lines – Strain, dead‑end, and heavy-angle towers where both pollution performance and maximum mechanical strength are critical.
• Substation entries – Heavy-duty insulation for strain and dead‑end towers in the most contaminated environments with limited space.
• Critical infrastructure – Lines where system reliability is paramount and maximum performance margins are required with minimal tower loading.

 

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 XWP3-120 Anti-Pollution Insulator Suspension can be assembled in strings. Explore our full range of suspension insulators and transmission hardware for more options.

 

H2: XWP3-120 Anti-Pollution Insulator Suspension — Quality and Performance Advantages

The XWP3-120 Anti-Pollution Insulator Suspension represents the ultimate combination of mechanical strength, pollution performance, and compact lightweight design in our anti-pollution series.

 

Key performance advantages include:

• 120kN mechanical rating – The highest in the anti-pollution series, providing 50kN (71%) more strength than 70kN anti-pollution insulators and 20kN (20%) more than 100kN models.
• 450mm ultra-long creepage distance – 150mm (+50%) longer than standard 300mm designs, ensuring maximum pollution flashover performance.
• Compact 146mm spacing – The shortest spacing in the 120kN anti-pollution class, reducing string length by 14mm compared to XWP2-120 (160mm) and minimising tower loading.
• Lightweight 8.3kg design – The lightest 120kN anti-pollution insulator available, 0.2kg lighter than the XWP2-120 (8.5kg) while delivering identical 120kN strength and 450mm creepage distance.
• 60kN routine proof test – The highest proof load in the series, demonstrating exceptional mechanical integrity.
• 10Nm impact strength – Maximum impact resistance in the anti-pollution series, ensuring robustness under dynamic loading.
• 45kV wet withstand voltage – 3kV higher than 70kN anti-pollution models.
• 280mm diameter – Large surface area for excellent pollution performance and self‑cleaning.

 

At just 8.3kg, the XWP3-120 offers the best strength-to-weight and strength-to-string-length ratio in the anti-pollution series — lighter than the XWP2-120 (8.5kg) and more compact than the XWP2-100 (160mm spacing) while delivering the highest 120kN mechanical rating.

 

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 XWP3-120 requires minimal routine maintenance. Every unit undergoes 100% routine testing before dispatch, including:

• Visual and dimensional inspections.
• Routine proof test load verification (60 kN).
• Impact strength testing (10 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 XWP3-120 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: XWP3-120 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 severely contaminated environments where maximum mechanical strength is essential and tower loading must be minimised. Our XWP3-120 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 transmission projects require the highest levels of mechanical strength, pollution performance, and compact string design — where standard 70kN, 100kN, or even 120kN insulators with longer spacing may not provide adequate performance margins or may impose excessive tower loading.

 

That is why the XWP3-120 Anti-Pollution Insulator Suspension is specifically engineered with a 120kN mechanical rating — the highest in the anti-pollution series — combined with an ultra-long 450mm creepage distance, a compact 146mm spacing, and a lightweight 8.3kg design to deliver maximum performance with minimum string length and tower loading. 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 XWP3-120 Anti-Pollution Insulator Suspension (brown or gray) is available with short lead times. Contact us today to discover how the XWP3-120 Anti-Pollution Insulator Suspension can strengthen your grid reliability in the most demanding contaminated environments while minimising string length and tower loading.

 

Anti-Pollution Series Comparison — Complete Overview

Parameter	XWP2-70	XWP3-70	XWP2-100	XWP3-100	XWP2-120	XWP3-120
M&E Strength	70 kN	70 kN	100 kN	100 kN	120 kN	120 kN
Diameter D	255 mm	280 mm	280 mm	280 mm	280 mm	280 mm
Spacing H	146 mm	160 mm	160 mm	146 mm	160 mm	146 mm
Creepage Distance	400 mm	450 mm	450 mm	450 mm	450 mm	450 mm
Wet Withstand Voltage	42 kV	42 kV	45 kV	45 kV	45 kV	45 kV
Lightning Impulse	120 kV	120 kV	120 kV	120 kV	120 kV	120 kV
Impact Strength	6 Nm	6 Nm	7 Nm	7 Nm	10 Nm	10 Nm
Proof Test Load	35 kN	35 kN	50 kN	50 kN	60 kN	60 kN
Net Weight	5.9 kg	6.7 kg	8.5 kg	7.9 kg	8.5 kg	8.3 kg
Relative Strength	Baseline	Identical	+43%	+43%	+71%	+71%
Key Advantage	Standard anti-pollution	Max creepage	High strength	High strength + light weight	Maximum strength	Maximum strength + compact + light weight
Best Application	Heavy industrial	Severe industrial	Severe industrial + high load	High load + reduced loading	Maximum load + severe pollution	Maximum load + severe pollution + minimum string length/tower loading

 

XWP2-120 vs XWP3-120 Comparison

Parameter	XWP2-120	XWP3-120	Advantage
M&E Strength	120 kN	120 kN	Identical
Diameter D	280 mm	280 mm	Identical
Spacing H	160 mm	146 mm	-14 mm (shorter string)
Creepage Distance	450 mm	450 mm	Identical
Wet Withstand Voltage	45 kV	45 kV	Identical
Impact Strength	10 Nm	10 Nm	Identical
Proof Test Load	60 kN	60 kN	Identical
Net Weight	8.5 kg	8.3 kg	-0.2 kg (lighter)
Key Advantage	Maximum strength	Maximum strength + compact + lighter	Shorter string length & lighter weight

 

XWP3-100 vs XWP3-120 Comparison

Parameter	XWP3-100	XWP3-120	Advantage
M&E Strength	100 kN	120 kN	+20 kN (+20%)
Routine Proof Test	50 kN	60 kN	+10 kN
Impact Strength	7 Nm	10 Nm	+3 Nm
Diameter D	280 mm	280 mm	Identical
Spacing H	146 mm	146 mm	Identical
Creepage Distance	450 mm	450 mm	Identical
Net Weight	7.9 kg	8.3 kg	+0.4 kg (minimal for +20kN)
Key Advantage	High strength + light	Maximum strength	20% higher M&E with minimal weight increase