Pw-33-Y/851 Pin-Type Insulator Porcelain – High-Voltage 33kV Overhead Line Insulation Solution
The Pw-33-Y/851 Pin-Type Insulator Porcelain is a robust and dependable solution for insulation and conductor support in 33kV overhead transmission and distribution lines. Manufactured to meet BS Standard requirements, the Pw-33-Y/851 insulator ensures seamless integration into power networks across India, Bangladesh, Southeast Asia, and other markets that follow British Standards.
The Pw-33-Y/851 features a durable glazed porcelain finish (available in brown, grey, or white), providing excellent weather resistance and long-term durability in outdoor environments. With its simple yet rugged construction, this insulator offers exceptional mechanical strength, good anti-pollution performance, and competitive cost.
Pw-33-Y/851 Pin-Type Insulator Porcelain Technical Specifications
| Parameter | Value |
| Model | Pw-33-Y/851 |
| Typical Application Voltage | 33 kV |
| Diameter (D) | 9⁷⁄₁₆ Inches (240 mm) |
| Height (H) | 12⅝ Inches (320 mm) |
| Total Creepage Distance | 33½ Inches (851 mm) |
| Protected Creepage Distance | 16½ Inches (419 mm) |
| Recommended Pin Height | 13 Inches (330 mm) |
| Cantilever Strength | 2,400 lbs (11 kN) |
| Power Frequency Dry Flashover Voltage | 140 kV |
| Power Frequency Wet Flashover Voltage | 110 kV |
| 50% Impulse Flashover Voltage, Positive | 210 kV |
| Power Frequency Dry Withstand Voltage | 125 kV |
| Power Frequency Wet Withstand Voltage | 100 kV |
| Dry Lightning Impulse Withstand Voltage | 200 kV |
| Power Frequency Puncture Voltage | 210 kV |
| Test Voltage RMS to Ground (RIV) | 44 kV |
| Maximum RIV at 1000 kHz | 200 μV |
| Net Weight, Approximate | 13.6 kg |
Pw-33-Y/851 Pin-Type Insulator Porcelain Key Features
Superior Electrical Performance – The Pw-33-Y/851 insulator delivers reliable electrical performance for 33kV systems, with a total creepage distance of 851 mm that effectively increases leakage distance and reduces the risk of pollution flashover, guaranteeing safe operation of 33kV lines even under rain, fog, and contaminated conditions.
High Mechanical Strength – With a cantilever strength of 11 kN (2,400 lbs), the insulator reliably withstands conductor tension, wind loads, and ice accretion, ensuring long‑term stability in overhead line installations.
Excellent Anti‑Pollution Flashover Performance – The protected creepage distance of 419 mm and total creepage of 851 mm effectively increase leakage distance, reduce the risk of pollution flashover, and ensure reliable operation across various contamination levels.
Simple Structure, Easy Installation – The pin‑type insulator features a one-piece porcelain body designed for convenient mounting on standard pins. The conductor is secured in the groove or on the neck of the insulator using standard binding methods.
Glazed Porcelain Finish – The insulator features a durable glaze coating (available in brown, grey, or white) that provides excellent weather resistance, UV protection, and self-cleaning properties, ensuring long-term performance in harsh outdoor environments.
Reliable Design – Engineered for long-term reliable operation with minimal maintenance requirements – regular visual inspections and cleaning are typically sufficient to ensure continued performance.
Pw-33-Y/851 Pin-Type Insulator Porcelain Application Scenarios
The Pw-33-Y/851 high‑voltage pin‑type insulator is ideal for:
- Insulation and conductor support in 33kV overhead distribution and transmission lines
- Outdoor installations with exposure to all atmospheric factors
- AC overhead power lines with frequencies not exceeding 100 Hz
- Power distribution networks in normal and polluted areas
- Installation on wooden, reinforced concrete, and metal poles
- Medium voltage distribution networks in India, Bangladesh, Southeast Asia, and other BS-standard markets
- Mounting options – can be used vertically or horizontally
Pw-33-Y/851 Pin-Type Insulator Porcelain Standards Compliance
| Standard | Description |
| BS 137 | Insulators of ceramic material or glass for overhead lines with a nominal voltage greater than 1000 V |
| IEC 60383 | Insulators for overhead lines – ceramic or glass insulator units for AC systems |
| ANSI / GB / DIN / AS | Additional standards available upon request |
Why Choose Pw-33-Y/851 Pin-Type Insulator Porcelain for Your Power Grid?
- Full BS compliance – meets BS 137 standard, ensuring smooth acceptance by grid operators and regulatory bodies in BS-standard markets
- Proven reliability – engineered with high mechanical strength (11kN cantilever strength) and robust electrical performance
- Pollution-resistant design – 851mm total creepage distance ensures reliable operation in contaminated environments
- Weather-resistant – glazed porcelain finish provides excellent weather resistance and UV protection
- Cost-effective – high performance at competitive pricing, reducing total project costs
- Versatile – suitable for high-voltage applications up to 36kV and available in multiple colors (brown, grey, white)
About the Pw-33-Y/851 Pin-Type Insulator Porcelain Manufacturer
The Pw-33-Y/851 Pin-Type Insulator Porcelain is manufactured by leading Chinese insulator manufacturers Bonle (Fujian) Insulator Co., Ltd. with decades of experience in power line products. These manufacturers hold ISO 9001 certification and produce insulators in accordance with IEC, ANSI, ASTM, AS, BS, DIN, and ISO standards. All products undergo rigorous electrical and mechanical testing before shipment, ensuring the highest quality standards.
Model: Pw-33-Y/851 | Standards: BS 137, IEC 60383 | Rated Voltage: 33 kV | Creepage Distance: 851 mm
Useful Links (replace with your actual URLs)
- Product Catalog – browse our full range of insulators
- Technical Datasheet – download detailed specifications and drawings
- Request a Quote – get pricing and availability for your project
- Certifications & Compliance – view our quality and testing certificates
For technical inquiries, bulk orders, or customized solutions, please contact our sales team via the links above.
Pw-33-Y/851 Pin-Type Insulator Porcelain References & Authoritative Resources
For certification, standard compliance, and procurement specifications, refer to:
- BS 137 – Insulators of ceramic material or glass for overhead lines with a nominal voltage greater than 1000V
- IEC 60383 – Insulators for overhead lines – ceramic or glass insulator units for AC systems
- Full Range of Pin Insulators – explore our complete product portfolio for transmission and distribution lines
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