33PD Line Post Pin Insulator – Grey Sand Glaze, CFE 52000-91, Mexican Market
The 33PD / 33 PD Insulator is a solid-core porcelain line post pin insulator designed for mechanical support and electrical insulation of conductors in overhead power distribution lines.
Manufactured in compliance with CFE 52000-91 — the Mexican Federal Electricity Commission specification for porcelain post insulators — this insulator provides reliable performance for distribution applications up to 34.5 kV system voltage.
The Class 57-3 design features a grey sand glaze finish and is intended exclusively for the Mexican market.
Whether used in crossarm-mounted distribution lines, pole-top structures, or line post applications, the 33PD Line Post Pin Insulator offers a cost-effective and durable solution for modern distribution infrastructure.
33PD Line Post Pin Insulator Technical Specifications
The 33PD Line Post Pin Insulator features a cantilever strength of 12.5 kN, making it ideal for line post applications in distribution networks.
Key electrical and dimensional ratings are detailed below:
| S/N | Technical Standard Particulars / Details | 33PD (Grey Sand) |
| 1 | Product Item No. / SKU Code | 33PD / 33 PD |
| 2 | Glaze Color | Grey Sand |
| 3 | ANSI Class | 57-3 |
| 4 | Figure No. (per drawing) | TBC |
| 5 | Type / Mounting | Line Post (Pin) / TBC |
| 6 | Reference Height / Length (mm) | TBC |
| 7 | Insulating Part Diameter (mm) | TBC |
| 8 | Cantilever Strength (kN) | 12.5 |
| 9 | Low-frequency Dry Flashover Voltage (kV) | 125 |
| 10 | Low-frequency Wet Flashover Voltage (kV) | 95 |
| 11 | Creepage Distance (mm) | 760 |
| 12 | Dry Arcing Distance (mm) | TBC |
| 13 | Positive Critical Impulse Flashover (kV) | 200 |
| 14 | Negative Critical Impulse Flashover (kV) | TBC |
| 15 | Radio Influence Voltage – Test Voltage (kV) | 30 |
| 16 | Radio Influence Voltage – Max RIV (μV) | 200 |
| 17 | Net Weight (approx.) (kg) | TBC |
| 18 | Applicable Standard | CFE 52000-91 |
| 19 | Voltage Maximum Design (kV) | 38 |
| 20 | Voltage Rating System (kV) | 34.5 |
| 21 | Salinity (kg/m³) | 14 |
| 22 | Test Voltage 60 Hz, to Ground (kV) | 22 |
| 23 | Test Voltage to Ground (kV) | 30 |
33PD Line Post Pin Insulator Additional Dimensions (mm) :
Overall height, Large shed diameter, Medium shed diameter, Small shed diameter, Radius, Detail A dimensions, Internal thread, Bottom bore / related diameter.
| Item | Value |
| Overall height | 368 ±15 |
| Large shed diameter | 165 ±5 |
| Medium shed diameter | 133 ±3 |
| Small shed diameter | 73 ±3 |
| Radius | R25 ±2 |
| Detail A dimensions | 22 ±2; 56 ±2; 133 ±3; 10.50 ±0.5 |
| Internal thread | M20 x 2.5 |
| Bottom bore / related diameter | Ø44 ±2 |
33PD Line Post Pin Insulator Material & Construction
Every unit of the 33PD Line Post Pin Insulator is made from high-grade porcelain with a grey sand glaze, fired at high temperature to achieve maximum density and near-zero porosity. The solid-core line post design ensures easy handling and reliable performance under extreme thermal cycling.
The hard, glossy glaze coating offers good self-cleaning properties, reducing maintenance frequency. Metal parts are typically made of galvanized malleable iron, ductile iron, steel, or aluminum, with ferrous parts hot-dip galvanized per applicable standards.
For more on porcelain manufacturing standards, visit the International Electrotechnical Commission (IEC).
Standard Reference: CFE 52000-91 – Aisladores de porcelana tipo poste para lineas de distribucion (Porcelain post insulators for distribution lines).
CFE Standard Overview: 52000-91 – Technical requirements for acquisition and electromechanical characteristics.
Material: Porcelain (grey sand glaze).
IRSA Drawing Number: 060000197
Sheet: 1 of 2
Unit: mm
Emission / Revision: A 06/08; B 01/11; C 05/12; D 03/13; Rev. 6
Revision Date: 080711
For CFE standard context, refer to the official CFE website. For related porcelain insulator options, see our porcelain insulators and suspension insulators.
33PD Line Post Pin Insulator Applications & Installation
The 33PD Line Post Pin Insulator is widely used in overhead power distribution lines, typically installed on crossarms and pole-mounted structures. It is ideal for:
- Overhead distribution line conductor support
- Crossarm-mounted applications
- Pole-top structures
- Line post and pin insulator applications in distribution networks
- CFE-standard distribution structures in Mexico
The line post pin design allows easy mounting using conductor tie wires or standard hardware, with internal thread and bottom bore dimensions to be confirmed from the original drawing. Explore our full range of suspension insulators and transmission hardware for more options.
33PD Line Post Pin Insulator Quality & Performance Advantages
Compared to polymer alternatives, porcelain offers unmatched resistance to UV radiation, bird pecking, and scratch damage. Its glaze reduces continuous water film formation, significantly raising pollution flashover voltage.
Moreover, the 33PD Line Post Pin Insulator requires minimal routine maintenance and delivers a long service life under normal operating conditions. Full testing procedures are detailed in CFE 52000-91 and related standards published by NEMA.
Every unit undergoes routine electrical and mechanical testing before dispatch, including visual inspection, dimensional checks, mechanical load tests, and high-voltage withstand tests. Design tests — such as dry flashover, wet flashover, critical impulse flashover, radio influence voltage, and thermal shock — are performed per CFE 52000-91 standards on new designs.
Quality conformance tests including porosity, galvanizing, and cantilever-strength tests are conducted on each lot. Full test reports and traceability records are provided for each batch. For installation guidance, refer to our insulator string assembly guide.
33PD Line Post Pin Insulator Packaging & Shipping
Each insulator is individually packed with foam cushioning and secured in sturdy cartons to prevent 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 33PD Line Post Pin Insulator, please contact our sales team via the inquiry form below. We also offer OEM services and free technical consultation for distribution line design.
Why Choose Our 33PD Line Post Pin Insulator
When selecting a CFE-referenced porcelain insulator for your distribution project, quality and reliability are paramount. Our 33PD Line Post Pin Insulator is subject to strict quality control at every production stage — from raw material inspection to final electrical testing.
We understand that distribution line outages are costly, which is why each 33PD Line Post Pin Insulator is designed for long-term durability.
With years of experience in porcelain insulator manufacturing, we provide competitive pricing, fast delivery, and dedicated technical support.
Whether you need a small sample batch or a full container order, our 33PD Line Post Pin Insulator is available with short lead times. Contact us today to learn how the 33PD Line Post Pin Insulator can enhance your distribution grid reliability.
Missing Information
The following items still require confirmation from a readable original PDF, drawing, or official datasheet:
- Numerical values for all listed dimension items
- Net weight
- Packaging dimensions and gross weight
- IRSACLAVE / IRSACOTAS
- Complete Sheet 2 of 2 data
- Additional marking / identification details
- Negative critical impulse flashover
- Dry arcing distance
- Full test reports or certified datasheet
Note: If the original 33PD PDF contains graphical drawings or tables, please provide a text-readable version or clear images. The current supplied content confirms the main electrical, mechanical, and standard data, but the dimension values are still incomplete.
