H1: 15004 Long-Rod Insulator Suspension Porcelain — 70kN, 500mm Creepage, Compact & Lightweight, IEC 60383
The 15004 long-rod suspension porcelain insulator is a compact, high‑performance insulation solution engineered for medium‑ to high‑voltage AC overhead transmission lines. It balances mechanical strength with reduced weight and minimal tower loading.
Manufactured in full compliance with IEC 60383 international standards, this long‑rod insulator features a one‑piece porcelain body that eliminates internal metallic components. This design reduces radio interference and ensures uniform voltage distribution.
With a mechanical failing load of 70kN and a creepage distance of 500mm, the 15004 delivers dependable performance in standard industrial, rural, and mildly polluted environments. It achieves this at a compact height of just 390mm and a net weight of only 9.0kg.
The long‑rod design provides excellent self‑cleaning properties, reducing maintenance intervals. The robust construction ensures stable insulation across extreme temperatures from ‑70°C to +105°C.
For projects requiring high mechanical strength with reduced structural loading, the 15004 long-rod insulator offers an ideal, cost‑effective solution.
H2: 15004 Long-Rod Insulator — Technical Specifications
The 15004 long-rod insulator is rated with a combined mechanical and electrical (M&E) failing load of 70kN. This makes it suitable for tangent suspension and light‑tension applications on 66–110 kV lines.
Its nominal creepage distance of 500mm provides reliable pollution flashover performance in moderately contaminated areas. The dry lightning impulse withstand voltage reaches 170kV (positive polarity).
The nominal diameter is 150mm, and the overall compact height is just 390mm. This offers significant weight savings compared to bulkier alternatives.
The coupling hardware uses the 16B ball & socket type, fully interchangeable per IEC dimensional requirements. This ensures seamless compatibility with existing fittings.
The glaze is available in both brown (standard) and gray (optional). Every unit passes a stringent porosity test at 180MPa·h to certify zero porosity, as required by IEC 60383.
H2: 15004 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 | 15004 (Brown Glaze) | 15004 (Gray Glaze) |
| Glaze Color | Brown | Gray |
| Figure No. | 3 | 3 |
| Height (mm) | 390 | 390 |
| Nominal Diameter D (mm) | 150 | 150 |
| Creepage Distance (mm) | 500 | 500 |
| Mechanical Failing Load (kN) | 70 | 70 |
| Routine Tensile Load (kN) | 56 | 56 |
| Coupling Size | 16B (Ball & Socket) | 16B (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) | 9.0 | 9.0 |
| Applied Standard | IEC 60383 | IEC 60383 |
Note: The compact 15004 long-rod insulator offers a lighter weight (9.0kg) and smaller footprint compared to standard 70kN class designs, reducing tower structural loads.
H2: 15004 Long-Rod Insulator — Material and Construction
Every 15004 long-rod insulator unit is manufactured 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 — confirmed by the 180 MPa·h porosity test.
The single‑piece porcelain rod ensures superior dielectric strength. The metal end‑fittings (cap and pin) are produced from malleable cast iron and hot‑dip galvanised steel. This provides excellent corrosion resistance in diverse atmospheric conditions.
The cement bonding between porcelain and metal utilizes high‑quality Portland cement. This guarantees mechanical stability under extreme thermal cycling from ‑70 °C to +105 °C.
The hard, glossy glaze (available in brown or gray) promotes self‑cleaning through rainwater runoff. This significantly reduces manual cleaning frequency and ensures long‑term surface integrity of the 15004 long-rod insulator.
H2: 15004 Long-Rod Insulator — Applications and Installation
The 15004 long-rod insulator is widely deployed on 66 kV to 110 kV AC overhead transmission lines, distribution networks, and substation entry towers.
Its compact dimensions and reduced weight (9.0kg) make it particularly advantageous for line sections with limited clearance, lighter tower structures, or where lower wind and ice loading are desired.
Typical application scenarios include:
- 66 kV lines – Suspension strings in standard rural and suburban corridors.
- 110 kV lines – Tangent suspension and light‑angle towers where mechanical strength (70kN) meets requirements with added compactness.
- Substation entries – Reliable insulation for strain and dead‑end towers where space is at a premium.
The standard 16B ball‑and‑socket coupling ensures full compatibility with existing socket hardware, clevis pins, and yokes. The long‑rod design facilitates easy hot‑stick handling for live‑line maintenance. This reduces outage time and maintenance costs.
For higher voltage requirements, multiple units of the 15004 long-rod insulator can be assembled in strings. Explore our full range of suspension insulators and transmission hardware for more options.
H2: 15004 Long-Rod Insulator — Quality and Performance Advantages
Compared to traditional multi‑disc insulator strings and even heavier long‑rod variants, the 15004 long-rod insulator offers an optimal balance of mechanical strength and lightweight construction.
At just 9.0kg, it reduces tower dead‑load. This allows for more economical tower designs or increased safety margins on existing structures.
The solid porcelain core eliminates internal air gaps. This effectively prevents puncture failures and ensures low radio interference voltage (RIV) throughout its service life.
With a service life exceeding 50 years, the 15004 demands 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 per IEC 60383.
Each insulator is individually foam‑cushioned and securely packed in sturdy wooden crates or corrugated cartons. This prevents transit damage. We offer flexible shipping options (FOB, CIF, EXW) with lead times of 15–30 days, depending on order quantity.
For detailed datasheets, CAD drawings, or competitive pricing on the 15004 long-rod insulator (brown or gray), please contact our sales team via the inquiry form below.
We also offer OEM services and complimentary technical consultation for string assembly design. For installation guidance, refer to our insulator string assembly guide.
H2: 15004 Long-Rod Insulator — Why Choose Our Product?
Selecting the right long‑rod insulator for your transmission infrastructure is essential for long‑term reliability. Our 15004 long-rod insulator is manufactured under rigorous quality control at every production stage.
From raw material inspection (high‑alumina clay) to final high‑voltage electrical testing, every step aligns with IEC 60383. We understand that reducing structural loads while maintaining mechanical strength is a key challenge for many transmission projects.
That is why the 15004 long-rod insulator is specifically designed to deliver 70kN capacity in a compact, lightweight package. With over a decade of experience in porcelain insulator manufacturing, we offer competitive factory pricing, fast delivery, and dedicated after‑sales support.
Whether you need a small sample batch for project validation or a full container shipment, the 15004 long-rod insulator (brown or gray) is available with short lead times. Contact us today to see how the 15004 long-rod insulator can optimize your grid reliability in space‑constrained or load‑sensitive applications.
