H1: XP-40C Suspension Insulator Standard Type — 40kN, 200mm Creepage, 16C Coupling, 75kV Lightning Impulse, Lightweight Compact Design, Brown/Gray Glaze, IEC 60383
The XP-40C Suspension Insulator standard type is a lightweight, compact cap-and-pin disc insulator engineered for low‑ to medium‑voltage AC overhead transmission and distribution lines requiring 16C coupling compatibility. Its compact 190mm diameter and lightweight 2.9kg design deliver dependable performance for light suspension applications with specific hardware requirements.
Manufactured in compliance with IEC 60383 international standards, this standard type insulator features a robust porcelain disc body with a proven cap-and-pin design. The unit is equipped with 16C coupling and 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 40kN and a creepage distance of 200mm, the XP-40C delivers reliable performance on 11–33 kV distribution lines in standard rural, suburban, and light industrial environments — providing an economical solution for light-duty suspension applications with 16C hardware requirements.
The standard shed design provides reliable insulation performance with excellent self‑cleaning properties, ensuring minimal maintenance requirements. The compact dimensions and light weight facilitate easy handling and installation, reducing labour costs and installation time.
Whether you are expanding rural distribution networks, upgrading existing lines with 16C hardware, or planning light-duty transmission projects, the XP-40C suspension insulator offers a durable, cost‑effective choice for your infrastructure, with the flexibility to select your preferred glaze color.
H2: XP-40C Suspension Insulator — Technical Specifications (Brown & Gray Glaze)
The XP-40C suspension insulator is rated with a combined mechanical and electrical (M&E) failing load of 40kN, making it suitable for tangent suspension and light‑tension applications on 11–33 kV overhead distribution lines in standard environments.
Its creepage distance of 200mm provides reliable pollution flashover performance in standard rural and suburban areas. The dry lightning impulse withstand voltage reaches 75kV (positive polarity), and the power frequency wet withstand voltage is 30kV.
The nominal diameter is 190mm, with a compact spacing (height) of 140mm. The standard shed design provides reliable insulation performance while facilitating self‑cleaning through rainwater runoff.
The coupling hardware is the 16C ball‑and‑socket type, ensuring full interchangeability with existing 16C fittings per IEC dimensional requirements. This coupling size is a key differentiator from the standard XP-40 (16 coupling), providing compatibility with specific hardware systems.
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 20kN and an impact strength test of 5Nm to verify mechanical integrity prior to dispatch. Power frequency puncture voltage reaches 90kV, and radio interference voltage (RIV) is exceptionally low at just 50μV at 1000 kHz (tested at 7.5kV).
H2: XP-40C 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 | XP-40C (Brown Glaze) | XP-40C (Gray Glaze) |
| Glaze Color | Brown | Gray |
| Type Designation | XP-40C (U40C) | XP-40C (U40C) |
| Figure / Profile | Standard Type | Standard Type |
| Diameter D (mm) | 190 | 190 |
| Spacing H (mm) | 140 | 140 |
| Creepage Distance (mm) | 200 | 200 |
| Coupling Size | 16C | 16C |
| Combined M&E Strength (kN) | 40 | 40 |
| Routine Proof Test Load (kN) | 20 | 20 |
| Impact Strength (Nm) | 5 | 5 |
| Power Frequency Dry Withstand Voltage (kV) | 55 | 55 |
| Power Frequency Wet Withstand Voltage (kV) | 30 | 30 |
| Dry Lightning Impulse Withstand Voltage (kV) | 75 | 75 |
| Power Frequency Puncture Voltage (kV) | 90 | 90 |
| Test Voltage RMS to Ground (kV) | 7.5 | 7.5 |
| Maximum RIV at 1000 kHz (μV) | 50 | 50 |
| Net Weight, Approximate (kg) | 2.9 | 2.9 |
| Applied Standard | IEC 60383 | IEC 60383 |
Note: The standard type XP-40C suspension insulator offers a compact, lightweight (2.9kg) design with 16C coupling for specific hardware compatibility, delivering proven performance for 11–33 kV distribution lines. Its economical design and easy handling make it an ideal choice for rural electrification and light-duty suspension applications requiring 16C hardware. Both brown and gray glazes offer the same outstanding performance.
H2: XP-40C Suspension Insulator — Material and Construction
Each XP-40C 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 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 16C coupling is precisely manufactured to ensure full interchangeability with existing 16C hardware.
The standard shed profile provides reliable insulation performance while facilitating self‑cleaning through rainwater runoff. The compact 190mm diameter and 140mm spacing minimise material usage while maintaining excellent electrical performance.
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: XP-40C Suspension Insulator — Applications and Installation
The XP-40C suspension insulator is widely deployed on 11 kV to 33 kV AC overhead transmission and distribution lines, as well as rural electrification networks and light-duty substation entries, particularly where 16C coupling hardware is standard.
The 40kN mechanical rating and compact lightweight design make it particularly suitable for:
- Rural electrification networks with 16C hardware – Where cost‑effective, lightweight insulators with specific coupling requirements are needed for widespread distribution infrastructure.
- 11–33 kV distribution lines – Standard suspension applications in rural, suburban, and light industrial areas requiring 16C coupling.
- Light-duty tangent towers – Where mechanical loads are moderate and compact design with 16C hardware is preferred.
- Distribution substation entries – Reliable insulation for light-duty strain and dead‑end towers with 16C hardware.
- Developing regions and infrastructure projects – Where economical, proven insulator designs with specific coupling sizes are required for grid expansion.
- Upgrade or retrofit projects – Where existing 16C hardware must be matched for seamless replacement.
Its 40kN mechanical capacity makes it suitable for suspension and light‑tension applications. The 200mm creepage distance provides reliable performance in standard rural and suburban environments.
Typical application scenarios include:
- 11 kV lines – Single suspension strings in distribution networks with 16C hardware.
- 33 kV lines – Suspension and light‑tension strings where 16C coupling is specified.
- Rural electrification – Reliable insulation for expanding grid access to remote areas with existing 16C hardware infrastructure.
The 16C ball‑and‑socket coupling ensures compatibility with existing 16C clevis pins, yokes, and socket hardware. The compact, lightweight design facilitates easy hot‑stick handling and manual installation, minimizing labour costs and installation time.
For higher voltage requirements, multiple units of the XP-40C suspension insulator can be assembled in strings. Explore our full range of suspension insulators and transmission hardware for more options.
H2: XP-40C Suspension Insulator — Quality and Performance Advantages
The XP-40C suspension insulator offers a proven, economical solution for light-duty distribution applications with specific 16C hardware requirements, delivering several key advantages:
- 16C coupling – Specifically designed for compatibility with 16C hardware systems, ensuring seamless integration with existing infrastructure.
- Lightweight 2.9kg design – Significantly reducing handling costs and tower loading.
- Compact 190mm diameter and 140mm spacing – Minimal material usage and space requirements.
- Cost‑effective solution – Ideal for large‑scale rural electrification and distribution projects where budget is a key consideration.
- Proven cap‑and‑pin design – Reliable performance with decades of field experience.
- Low RIV (≤50μV) – Minimal electromagnetic interference with communication systems.
- IEC 60383 compliance – Manufactured to international standards for quality assurance.
With an expected service life exceeding 50 years under normal operating conditions, the XP-40C requires minimal routine maintenance. Every unit undergoes 100% routine testing before dispatch, including:
- Visual and dimensional inspections.
- Routine proof test load verification (20 kN).
- Impact strength testing (5 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 XP-40C 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: XP-40C Suspension Insulator — Why Choose Our Product?
Selecting the right suspension insulator for your distribution infrastructure is critical to long‑term grid reliability — especially in projects requiring specific 16C coupling compatibility. Our XP-40C 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 many distribution projects require not only reliability and cost‑effectiveness but also specific hardware compatibility to match existing infrastructure.
That is why the XP-40C suspension insulator is specifically engineered with a 16C coupling — providing seamless compatibility with existing 16C hardware systems — combined with a lightweight 2.9kg compact design, proven 40kN mechanical rating, and reliable 200mm creepage distance for 11–33 kV distribution 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 XP-40C suspension insulator (brown or gray) is available with short lead times. Contact us today to discover how the XP-40C suspension insulator can strengthen your distribution grid reliability with an economical, proven solution designed for 16C hardware compatibility.
XP-40 vs XP-40C Comparison
| Parameter | XP-40 (U40B) | XP-40C (U40C) | Advantage |
| M&E Strength | 40 kN | 40 kN | Identical |
| Diameter D | 190 mm | 190 mm | Identical |
| Spacing H | 140 mm | 140 mm | Identical |
| Creepage Distance | 200 mm | 200 mm | Identical |
| Coupling Size | 16 | 16C | 16C compatibility |
| Dry Withstand Voltage | 55 kV | 55 kV | Identical |
| Wet Withstand Voltage | 30 kV | 30 kV | Identical |
| Lightning Impulse | 75 kV | 75 kV | Identical |
| Puncture Voltage | 90 kV | 90 kV | Identical |
| Net Weight | 2.8 kg | 2.9 kg | +0.1 kg (minimal) |
| Key Advantage | Standard 16 coupling | 16C coupling | Specific hardware compatibility |
Standard XP Series — Complete Overview
| Parameter | XP-40 (U40B) | XP-40C (U40C) | XP-70 (U70B) |
| M&E Strength | 40 kN | 40 kN | 70 kN |
| Diameter D | 190 mm | 190 mm | 255 mm |
| Spacing H | 140 mm | 140 mm | 146 mm |
| Creepage Distance | 200 mm | 200 mm | 300 mm |
| Coupling Size | 16 | 16C | 16 |
| Dry Withstand | 55 kV | 55 kV | 70 kV |
| Wet Withstand | 30 kV | 30 kV | 40 kV |
| Lightning Impulse | 75 kV | 75 kV | 105 kV |
| Puncture Voltage | 90 kV | 90 kV | 120 kV |
| Net Weight | 2.8 kg | 2.9 kg | 5.7 kg |
| Best Application | 11-33kV distribution / rural | 11-33kV distribution with 16C hardware | 33-66kV transmission |
