H1: 15005 Long-Rod Insulator Suspension Porcelain — 70kN, 600mm Creepage, Extra-long Creepage, IEC 60383
The 15005 long-rod suspension porcelain insulator is a high-performance insulation solution engineered for medium‑ to high‑voltage AC overhead transmission lines operating in moderately to heavily polluted environments. It delivers exceptional mechanical strength and superior pollution flashover performance.
Fully compliant with IEC 60383 international standards, this long‑rod insulator features a one‑piece porcelain body that eliminates internal metallic components. This design minimizes radio interference and ensures uniform voltage distribution across the string.
With a mechanical failing load of 70kN and an extended creepage distance of 600mm, the 15005 provides reliable performance in industrial, coastal, and high-contamination areas where standard creepage distances may be insufficient.
The long‑rod profile offers excellent self‑cleaning properties, reducing maintenance requirements. The robust construction ensures stable insulation across extreme temperatures from ‑70°C to +105°C.
For transmission projects in polluted regions where insulation reliability is critical, the 15005 long-rod insulator offers a durable, cost‑effective solution.
H2: 15005 Long-Rod Insulator — Technical Specifications
The 15005 long-rod insulator is rated with a combined mechanical and electrical (M&E) failing load of 70kN. This makes it ideally suited for tangent suspension and light‑tension applications on 66–110 kV lines in areas with elevated pollution levels.
Its extended creepage distance of 600mm provides superior pollution flashover performance in moderately to heavily contaminated environments. The dry lightning impulse withstand voltage reaches 170kV (positive polarity).
The nominal diameter is 180mm, and the overall height is 423mm. The extended creepage is achieved through optimized shed profile design without increasing overall dimensions.
The coupling hardware is the standard 16L ball & socket type. This ensures full interchangeability with existing fittings per IEC dimensional requirements.
The glaze is offered in both brown (standard) and gray (optional). Every unit undergoes a rigorous porosity test at 180MPa·h to certify zero porosity, as mandated by IEC 60383.
H2: 15005 Long-Rod Insulator — Complete Technical Data (per IEC 60383)
The following table lists all technical parameters for both glaze color options. All values are identical except for the glaze color.
| Parameter | 15005 (Brown Glaze) | 15005 (Gray Glaze) |
| Glaze Color | Brown | Gray |
| Figure No. | 2 | 2 |
| Height (mm) | 423 | 423 |
| Nominal Diameter D (mm) | 180 | 180 |
| Creepage Distance (mm) | 600 | 600 |
| Mechanical Failing Load (kN) | 70 | 70 |
| Routine Tensile Load (kN) | 56 | 56 |
| Coupling Size | 16L (Ball & Socket) | 16L (Ball & Socket) |
| Temperature Cycle Test | 70K / 3 times | 70K / 3 times |
| Porosity Test | 180 MPa·h | 180 MPa·h |
| Power‑freq. Wet Withstand Voltage (kV) | 70 | 70 |
| Dry Lightning Impulse Withstand Voltage (kV) | 170 | 170 |
| Net Weight (kg) | 10.2 | 10.2 |
| Applied Standard | IEC 60383 | IEC 60383 |
Note: The 15005 long-rod insulator offers an extended 600mm creepage distance for enhanced pollution performance, making it ideal for contaminated environments where standard insulators may fail.
H2: 15005 Long-Rod Insulator — Material and Construction
Each 15005 long-rod insulator unit is produced from high‑grade alumina porcelain. It is fired at over 1,300 °C using the wet process. This achieves maximum density and near‑zero porosity — verified through the 180 MPa·h porosity test.
The single‑piece porcelain rod ensures excellent dielectric strength. The metal end‑fittings (cap and pin) are manufactured from malleable cast iron and hot‑dip galvanised steel. This provides outstanding corrosion resistance in diverse atmospheric conditions.
The cement bonding between the porcelain body and metal parts uses high‑quality Portland cement. This guarantees mechanical stability across extreme thermal cycling from ‑70 °C to +105 °C.
The hard, glossy glaze (available in brown or gray) promotes self‑cleaning by facilitating rainwater runoff. This significantly reduces the frequency of manual washing and inspection, extending the service life of the 15005 long-rod insulator.
H2: 15005 Long-Rod Insulator — Applications and Installation
The 15005 long-rod insulator is widely deployed on 66 kV to 110 kV AC overhead transmission lines, distribution networks, and substation entry towers located in moderately to heavily polluted areas.
Its extended 600mm creepage distance makes it particularly suitable for:
- Industrial areas – Where airborne contaminants from factories and processing plants accelerate insulator contamination.
- Coastal regions – Where salt spray and marine aerosols create conductive deposits on insulator surfaces.
- Heavily polluted urban corridors – Where traffic emissions and industrial pollution combine to reduce insulation performance.
Its 70kN mechanical capacity makes it suitable for both suspension and light‑tension applications. The extended creepage provides reliable performance even in challenging environmental conditions.
Typical application scenarios include:
- 66 kV lines – Single or double suspension strings in polluted industrial and coastal areas.
- 110 kV lines – Suspension and light‑tension strings where pollution performance is prioritized.
- Substation entries – Reliable insulation for strain and dead‑end towers in contaminated environments.
The standard 16L ball‑and‑socket coupling ensures compatibility with existing clevis pins, yokes, and socket hardware. The long‑rod design facilitates easy hot‑stick handling for live‑line maintenance, minimizing system downtime during replacements.
For higher voltage requirements, multiple units of the 15005 long-rod insulator can be assembled in strings. Explore our full range of suspension insulators and transmission hardware for more options.
H2: 15005 Long-Rod Insulator — Quality and Performance Advantages
Compared to traditional multi‑disc insulator strings and standard creepage long‑rod variants, the 15005 long-rod insulator offers a significant advantage: an extended 600mm creepage distance that delivers superior pollution flashover performance.
The extended creepage is achieved through optimized shed geometry without increasing overall height or weight significantly (just 10.2 kg). This makes the 15005 an ideal upgrade for lines operating in contaminated environments where standard 550mm creepage insulators may be insufficient.
The solid porcelain core eliminates internal air gaps, effectively preventing puncture failures. It also ensures consistently low radio interference voltage (RIV) throughout its service life.
With an expected service life exceeding 50 years under normal operating conditions, the 15005 requires minimal routine maintenance. Every unit undergoes 100% routine testing before dispatch, including:
- Visual and dimensional inspections.
- Routine tensile load verification (56 kN).
- Power‑frequency wet withstand voltage test (70 kV).
- Porosity and temperature‑cycle prototype testing as specified by 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 15005 long-rod 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: 15005 Long-Rod Insulator — Why Choose Our Product?
Selecting the right long‑rod insulator for your transmission infrastructure is critical to long‑term grid reliability — especially in polluted environments.
Our 15005 long-rod insulator is manufactured under stringent quality control protocols at every production stage.
From raw material sourcing (high‑alumina 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.
That is why the 15005 long-rod insulator is specifically engineered with an extended 600mm creepage distance to deliver reliable performance where standard insulators may fail.
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 15005 long-rod insulator (brown or gray) is available with short lead times.
Contact us today to discover how the 15005 long-rod insulator can strengthen your grid reliability in polluted environments.
