H1: XMP-210 Suspension Insulator (U210BL) Aerodynamic Type — 210kN, 380mm Creepage, 110kV Lightning Impulse, Brown/Gray Glaze, IEC 60383

The XMP-210 Suspension Insulator (U210BL) Aerodynamic Type is an ultimate-strength cap-and-pin porcelain insulator engineered for high‑voltage AC overhead transmission lines requiring maximum mechanical capacity and enhanced pollution performance.

 

Its distinctive aerodynamic profile reduces wind loading while the 210kN rating delivers the highest strength in the XMP series for the most extreme applications.

 

Manufactured in compliance with IEC 60383 international standards, this suspension insulator features a robust porcelain 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 210kN and an extended creepage distance of 380mm, the XMP-210 delivers dependable performance on 110–220 kV lines in standard and moderately polluted environments — offering a significant 140kN strength advantage over standard 70kN class insulators and 50kN over 160kN class insulators.

 

The aerodynamic design incorporates optimized shed geometry that minimizes wind resistance and promotes rainwater runoff. This reduces maintenance requirements while ensuring stable insulation performance.

 

Whether you are designing lines for extreme icing zones, long-span crossings, heavily loaded strain towers at higher voltages, or EHV transmission corridors, the XMP-210 suspension insulator offers a durable, ultimate-strength choice for your infrastructure, with the flexibility to select your preferred glaze color.

 

H2: XMP-210 Suspension Insulator — Technical Specifications (Brown & Gray Glaze)

The XMP-210 suspension insulator is rated with a combined mechanical and electrical (M&E) failing load of 210kN, making it suitable for tangent suspension, light‑tension, strain, and dead‑end applications on 110–220 kV overhead lines where maximum mechanical strength is required.

 

Its extended creepage distance of 380mm provides enhanced pollution flashover performance in moderately contaminated environments. The dry lightning impulse withstand voltage reaches 110kV (positive polarity), and the power frequency wet withstand voltage is 45kV.

 

The nominal diameter is 420mm, with a spacing (height) of 170mm — taller than lower-rated XMP models to accommodate the increased mechanical demands. The aerodynamic profile reduces wind loading by approximately 15–20% compared to standard disc designs, improving self‑cleaning and reducing tower loads.

 

The coupling hardware is available in both 20 and 24 ball‑and‑socket types, ensuring full interchangeability with existing fittings per IEC dimensional requirements. This dual coupling option provides flexibility for different hardware configurations and higher mechanical loads.

 

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 105kN and an impact strength test of 11.3Nm to verify mechanical integrity prior to dispatch. Power frequency puncture voltage reaches 130kV, and radio interference voltage (RIV) is exceptionally low at just 50μV at 1000 kHz.

 

H2: XMP-210 Suspension 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	XMP-210 (Brown Glaze)	XMP-210 (Gray Glaze)
Glaze Color	Brown	Gray
Type Designation	XMP-210 (U210BL)	XMP-210 (U210BL)
Figure / Profile	Aerodynamic Type	Aerodynamic Type
Diameter D (mm)	420	420
Spacing H (mm)	170	170
Creepage Distance (mm)	380	380
Coupling Size	20 / 24	20 / 24
Combined M&E Strength (kN)	210	210
Routine Proof Test Load (kN)	105	105
Impact Strength (Nm)	11.3	11.3
Power Frequency Dry Withstand Voltage (kV)	75	75
Power Frequency Wet Withstand Voltage (kV)	45	45
Dry Lightning Impulse Withstand Voltage (kV)	110	110
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)	12.4	12.4
Applied Standard	IEC 60383	IEC 60383

 

Note: The aerodynamic profile of the XMP-210 suspension insulator reduces wind loading by approximately 15–20% compared to standard disc designs.

 

The 210kN rating delivers ultimate mechanical strength — 140kN higher than standard 70kN class insulators — making it ideal for the most extreme long spans, heavy icing zones, strain/dead-end towers, and 110–220 kV applications.

 

The 420mm diameter and 380mm creepage distance provide enhanced pollution performance. Available with both 20 and 24 coupling options for maximum hardware flexibility. Both brown and gray glazes offer the same outstanding performance.

 

H2: XMP-210 Suspension Insulator — Material and Construction

Each XMP-210 suspension 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 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 larger 420mm diameter, extended 380mm creepage distance, and taller 170mm spacing are achieved through optimized shed geometry that enhances both mechanical strength and pollution performance. The 170mm height provides increased mechanical stability for the 210kN rating.

 

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

 

The aerodynamic shed profile is carefully engineered to reduce wind resistance and facilitate self‑cleaning through rainwater runoff. 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. The choice between brown and gray is purely aesthetic or based on regional preference.

 

H2: XMP-210 Suspension Insulator — Applications and Installation

The XMP-210 suspension insulator is widely deployed on 110 kV to 220 kV AC overhead transmission lines, as well as substation entry towers and switching stations where mechanical demands are at their absolute highest.

 

The 210kN mechanical rating — the highest in the XMP series — makes it particularly suitable for:

• Ultra-long-span lines – Such as major river crossings, wide valley spans, and transmission corridors in mountainous terrain where conductor weight and tension are maximized.
• Extreme heavy icing zones – Where ice accretion adds significant weight and mechanical stress, often exceeding the capacity of standard 70kN, 100kN, or even 160kN insulators.
• High wind load areas – Where combined wind and ice loading demand maximum mechanical strength.
• Strain, angle, and dead‑end towers – Where mechanical capacity requirements far exceed standard suspension applications at high voltages.
• 110–220 kV transmission lines – Where higher system voltages require larger insulators with extended creepage distances and maximum mechanical ratings.

 

The 420mm diameter, 380mm creepage distance, and 170mm spacing provide enhanced pollution flashover performance and mechanical stability, making the XMP-210 suitable for moderately contaminated environments as well.

 

Its aerodynamic profile offers additional advantages in:

• Coastal regions – Where high winds and salt spray are common; the reduced wind loading minimizes swing and mechanical stress on towers.
• High-wind corridors – Open plains, mountain passes, and offshore-influenced areas where standard discs may experience excessive wind-induced movement.

 

Typical application scenarios include:

• 110 kV lines – Double suspension strings, strain applications, and dead‑end towers in extreme environments.
• 220 kV lines – Strain, dead‑end, and heavy-angle towers where maximum mechanical strength is non‑negotiable.
• Substation entries – Reliable insulation for heavy-duty strain and dead‑end towers in the most demanding locations.
• EHV transmission corridors – As part of multi-string configurations for extra-high-voltage applications.

 

The standard 20 or 24 ball‑and‑socket coupling options ensure compatibility with existing socket hardware, clevis pins, and yokes designed for higher mechanical loads. The dual coupling option provides maximum flexibility for different hardware configurations.

 

For higher voltage requirements, multiple units of the XMP-210 suspension insulator can be assembled in strings. Explore our full range of suspension insulators and transmission hardware for more options.

 

H2: XMP-210 Suspension Insulator — Quality and Performance Advantages

The XMP-210 suspension insulator represents the absolute pinnacle of mechanical strength in our aerodynamic suspension insulator series. Its 210kN rating delivers:

• 140kN (200%) advantage over standard 70kN insulators
• 130kN (163%) advantage over 80kN class insulators
• 110kN (110%) advantage over 100kN class insulators
• 90kN (75%) advantage over 120kN class insulators
• 50kN (31%) advantage over 160kN class insulators

 

Beyond its exceptional mechanical strength, the XMP-210 offers several key performance advantages:

• Extended creepage distance of 380mm – Enhanced pollution flashover performance for 110–220 kV applications in moderately contaminated environments.
• Larger diameter of 420mm – Provides increased surface area for improved electrical performance and self‑cleaning.
• Taller spacing of 170mm – Enhanced mechanical stability and improved insulation performance.
• Dual coupling options (20/24) – Maximum hardware flexibility for different project requirements and global compatibility.
• Higher electrical ratings – 75kV dry withstand, 45kV wet withstand, 110kV lightning impulse, and 130kV puncture voltage.

 

The aerodynamic shed design further enhances performance by reducing wind loading by approximately 15–20%, minimizing insulator swing and reducing mechanical stress on tower structures — a critical benefit when operating at the highest mechanical ratings.

 

At just 12.4kg, the XMP-210 offers an excellent strength-to-weight ratio for a 210kN class insulator, representing an industry-leading design that maximizes mechanical strength while minimizing additional tower loading.

With an expected service life exceeding 50 years under normal operating conditions, the XMP-210 requires minimal routine maintenance. Every unit undergoes 100% routine testing before dispatch, including:

• Visual and dimensional inspections.
• Routine proof test load verification (105 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 XMP-210 suspension 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: XMP-210 Suspension Insulator — Why Choose Our Product?

Selecting the right suspension insulator for your transmission infrastructure is critical to long‑term grid reliability — especially in ultra-long-span, extreme heavy icing, or high-voltage applications. Our XMP-210 suspension 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 major river crossings, extreme icing zones, dead‑end towers, and 220 kV lines can push even 160kN insulators beyond their safe operating limits.

 

That is why the XMP-210 suspension insulator is specifically engineered with a 210kN mechanical rating — the highest in our aerodynamic series — combined with an extended 380mm creepage distance, larger 420mm diameter, taller 170mm spacing, and dual 20/24 coupling options to handle the most extreme mechanical and electrical demands. 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 XMP-210 suspension insulator (brown or gray) is available with short lead times. Contact us today to discover how the XMP-210 suspension insulator can strengthen your grid reliability in the most extreme environments.