ШФ-20Г1 Pin-Type Insulator – High-Voltage 20kV Overhead Line Insulation Solution for Russian & CIS Markets
The ШФ-20Г1 Pin-Type 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-20Г1 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-20Г1 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.
The ШФ-20Г1 is a modified version of the ШФ-20Г with improved design characteristics and increased weight, offering enhanced mechanical stability for demanding overhead line applications.
ШФ-20Г1 Pin-Type 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 | 3.8 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 |
*Note: Impulse withstand voltage and breakdown voltage values are in accordance with GOST 1232-93 requirements for 20kV pin-type insulators, consistent with the ШФ-20Г series.
ШФ-20Г1 Pin-Type Insulator Key Features
Superior Electrical Performance – The ШФ-20Г1 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, while the additional “1” denotes a further design refinement. The ШФ-20Г1 represents an enhanced version of the ШФ-20Г with improved structural characteristics and greater mechanical stability.
Fail-Safe Design – In the event of a breakdown, the insulator does not shatter and the conductor does not break.
Enhanced Mechanical Stability – With a weight of 3.8 kg (compared to 3.5 kg for the ШФ-20Г), the ШФ-20Г1 offers increased mass for improved vibration damping and stability in high-wind or icy conditions.
ШФ-20Г1 Pin-Type Insulator Application Scenarios
The ШФ-20Г1 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
- Lines with increased mechanical loads requiring enhanced insulator mass and stability
ШФ-20Г1 Pin-Type 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-20Г1 insulators |
Model Designation Code Interpretation (ШФ-20Г1)
| Symbol | Meaning |
| Ш | Pin-type insulator (штыревой) |
| Ф | Material: electrical porcelain (фарфор) |
| 20 | Voltage class (rated voltage, kV) |
| Г | Design modification, modernization index |
| 1 | Further design refinement / modification number |
Why Choose ШФ-20Г1 Pin-Type 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 – engineered with high mechanical strength (13kN bending failing load) and robust electrical performance
- 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
- Enhanced mechanical stability – increased weight (3.8 kg) provides improved vibration damping and stability in high-wind or icy conditions
- Modernized design – refined version of ШФ-20Г with improved structural characteristics
- Fail-safe – does not shatter upon breakdown; conductor does not break
About the ШФ-20Г1 Pin-Type 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-20Г1 | 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-20Г1 Pin-Type 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-20Г1 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.
