ШФ-20Г Pin-Type Porcelain Insulator – High-Voltage 20kV Overhead Line Insulation Solution for Russian & CIS Markets
The ШФ-20Г pin-type porcelain insulator is a robust and dependable solution for insulation and conductor support in 20kV overhead transmission and distribution lines. Manufactured from high-strength electrical porcelain, the ШФ-20Г insulator is designed to meet GOST 1232-93 Porcelain and Glass Pin-Type Insulators for Voltage from 1 to 35 kV. General Specifications, with insulating parts manufactured in compliance with GOST 20419-83 Electrical Ceramic Materials. General Specifications (material subgroup 110). It also complies with TU 3493-133-00111120-96 technical specifications. This ensures seamless integration into Russian power networks and other CIS countries.
The ШФ-20Г features a glazed porcelain finish, providing excellent weather resistance and long-term durability in outdoor environments. The insulator is designed for operation in temperate and cold climates (У and ХЛ categories per GOST 15150-69) with ambient temperatures ranging from -60°C to +50°C.
ШФ-20Г Pin-Type Porcelain Insulator Technical Specifications
| Parameter | Value |
| Rated System Voltage | 20 kV |
| Creepage Distance, not less than | 400 mm |
| Power Frequency Withstand Voltage (Dry) | 85 kV |
| Power Frequency Withstand Voltage (Wet) | 65 kV |
| Lightning Impulse Withstand Voltage | 135 kV |
| Breakdown Voltage in Insulating Medium | 180 kV |
| Mechanical Bending Failing Load, not less than | 13 kN |
| Main Dimensions (Diameter × Height) | Ø190 mm × 180 mm |
| Mounting Pin (Hook) Diameter | Ø22 mm |
| Weight | 3.5 kg |
| Ambient Temperature Range | -60°C to +50°C |
| Frequency | Up to 100 Hz |
| Applicable Standards | GOST 1232-93, GOST 20419-83, TU 3493-133-00111120-96 |
ШФ-20Г Pin-Type Porcelain Insulator Key Features
Superior Electrical Performance – The ШФ-20Г insulator delivers a dry power frequency withstand voltage of 85 kV, wet power frequency withstand voltage of 65 kV, lightning impulse withstand voltage of 135 kV, and breakdown voltage of 180 kV, guaranteeing safe and reliable operation of 20kV lines even under rain, fog, and lightning conditions.
High Mechanical Strength – With a minimum bending failing load of 13 kN, 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 creepage distance of no less than 400 mm effectively increases leakage distance, reduces the risk of pollution flashover, and is suitable for atmospheric pollution types I and II per GOST 9920-89. Applicable in areas with I, II, III degrees of atmospheric pollution with thunderstorm duration less than 40 hours.
Simple Structure, Easy Installation – The pin‑type insulator features a one-piece porcelain body. It is mounted on standard pins or hooks KV-22 using sealing polyethylene caps of types K, KP. The conductor is secured in the groove or on the neck of the insulator using wire binding VSh-1 or spiral binding of the PVS series.
Glazed Porcelain Finish – The insulator features a durable glaze coating that provides excellent weather resistance, UV protection, and self-cleaning properties, ensuring long-term performance in harsh outdoor environments.
Modernized Design – The letter “Г” in the designation indicates the modernization index. Earlier modifications (ШФ-20, ШФ-20А, ШФ-20Б) are now obsolete and no longer produced. The ШФ-20Г represents the current standard with improved technical characteristics.
Fail-Safe Design – In the event of a breakdown, the insulator does not shatter and the conductor does not break.
Low Failure Rate – With an average annual failure rate of just 0.0005 relative units per year, ensuring long-term reliable operation.
ШФ-20Г Pin-Type Porcelain Insulator Application Scenarios
The ШФ-20Г high‑voltage pin‑type insulator is ideal for:
- Insulation and conductor support in 15kV, 20kV, and 35kV overhead distribution and transmission lines
- Outdoor installations with ambient temperatures ranging from -60°C to +50°C
- AC overhead power lines with frequencies not exceeding 100 Hz
- Switchgear (RU) of power plants and substations
- Railway transport lines
- Areas with I, II, III degrees of atmospheric pollution (per standard project 3.407-143)
- Installation on wooden, reinforced concrete, and metal poles
ШФ-20Г Pin-Type Porcelain Insulator Standards Compliance
| Standard | Description |
| GOST 1232-93 | Porcelain and glass pin‑type insulators for voltage from 1 to 35 kV. General specifications |
| GOST 20419-83 | Electrical ceramic materials. General specifications (insulating part – electrical ceramic material subgroup 110) |
| GOST 15150-69 | Climatic modifications and placement categories (У and ХЛ – temperate and cold climate, outdoor installation) |
| GOST 9920-89 | Pollution degree classification (types I and II) |
| GOST 6490-93 | Porcelain line pin insulators for rated voltage 6-35 kV. General specifications |
| TU 3493-133-00111120-96 | Technical specifications for ШФ-20Г insulators |
Model Designation Code Interpretation (ШФ-20Г)
| Symbol | Meaning |
| Ш | Pin-type insulator (штыревой) |
| Ф | Material: electrical porcelain (фарфор) |
| 20 | Voltage class (rated voltage, kV) |
| Г | Design modification, modernization index |
Why Choose ШФ-20Г Pin-Type Porcelain Insulator for Your Power Grid?
- Full GOST and TU compliance – meets GOST 1232-93, GOST 20419-83, and TU 3493-133-00111120-96, ensuring smooth acceptance by grid operators and regulatory bodies in Russian and CIS markets
- Enhanced impulse performance – with 135kV lightning impulse withstand voltage, providing superior protection against surge events
- Proven reliability – with an average annual failure rate of just 0.0005 relative units per year
- Pollution-resistant design – 400mm creepage distance ensures reliable operation in contaminated environments
- Weather-resistant – operates in temperatures from -60°C to +50°C with exposure to all atmospheric factors
- Cost-effective – high performance at competitive pricing, reducing total project costs
- Modernized design – replaces obsolete ШФ-20, ШФ-20А, ШФ-20Б models with improved characteristics
- Fail-safe – does not shatter upon breakdown; conductor does not break
About the ШФ-20Г Pin-Type Porcelain Insulator Manufacturer
Bonle (Fujian) Insulator Co., Ltd., established in 2006, is located in Baizhong Industrial Zone, Minqing County, Fujian Province, China. The company specializes in the production of high and low voltage electrical porcelain products, including disc suspension insulators, anti-pollution disc suspension insulators, pin insulators, post insulators, porcelain cross-arm insulators, and over a hundred other products across dozens of series. All products undergo rigorous electrical and mechanical testing before shipment, ensuring the highest quality standards.
Model: ШФ-20Г | Standards: GOST 1232-93, GOST 20419-83, TU 3493-133-00111120-96 | Rated Voltage: 20 kV | Manufacturer: Bonle (Fujian) Insulator Co., Ltd.
Useful Links (please 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.
ШФ-20Г Pin-Type Porcelain Insulator References & Authoritative Resources
For certification, standard compliance, and procurement specifications, refer to:
- GOST 1232-93 – Porcelain and glass pin-type insulators for voltage from 1 to 35 kV. General specifications
- GOST 20419-83 – Electrical ceramic materials. General specifications
- GOST 15150-69 – Climatic modifications and placement categories
- GOST 9920-89 – Pollution degree classification
- GOST 6490-93 – Porcelain line pin insulators for rated voltage 6-35 kV. General specifications
- TU 3493-133-00111120-96 – Technical specifications for ШФ-20Г insulators
- Full Range of Insulators – explore our complete product portfolio for transmission and distribution lines
- Insulator Assembly Guide – installation best practices, string design, and torque specifications
This page is optimized for search engines with relevant keywords for the Russian power equipment market. No external third‑party company links are included.
