LXP-40 (U40B) Glass Insulator Disc Suspension Ball and Socket — 40kN Toughened Glass Insulator for 10–35kV Overhead Power Lines
The LXP-40 (U40B) Glass Insulator is a standard-profile, ball-and-socket type disc suspension insulator with a rated mechanical failing load of 40kN (10,000 lbs).
Manufactured by TCI Insulators, this insulator is engineered for insulation and mechanical support of overhead transmission and distribution lines operating at 10kV to 35kV.
It combines high-strength toughened glass with hot-dip galvanized steel hardware, delivering reliable performance in urban power grids, rural distribution networks, and industrial supply lines.
The U40B designation follows the IEC naming convention: U = disc suspension insulator, 40 = rated mechanical failing load of 40kN, B = ball-and-socket coupling type.
The unit is fully compliant with IEC 60383-1 and GB/T 1001.1 standards, with connection structures conforming to GB/T 4056-2008 (IEC 60120) and BS 3288 Part III.
LXP-40 (U40B) Glass Insulator Technical Specifications
Dimensions
| Parameter | Value |
| Diameter (D) | 6 7/8 inch (175mm) |
| Spacing (H) | 4 5/16 inch (110mm) |
| Leakage Distance | 7 1/2 inch (190mm) |
| Coupling Size | 11 |
The optimized aerodynamic umbrella profile with deep concentric ribs effectively prevents water-film formation, dramatically reducing flashover risk in heavy rain, fog, or polluted environments.
LXP-40 (U40B) Glass Insulator Mechanical Values
| Parameter | Value |
| Mechanical Failing Load | 10,000 lbs (40kN) |
| Tension Proof | 5,000 lbs (20kN) |
The 40kN mechanical failing load provides exceptional tensile strength to withstand extreme wind, ice, and conductor loads. Each unit undergoes a routine proof test at 20kN to guarantee reliability.
LXP-40 (U40B) Glass Insulator Electrical Values
| Parameter | Value |
| Low Frequency Dry Flashover Voltage | 65kV |
| Low Frequency Wet Flashover Voltage | 40kV |
| Critical Impulse Flashover Voltage, Positive | 85kV |
| Critical Impulse Flashover Voltage, Negative | 90kV |
| Low Frequency Puncture Voltage | 100kV |
The toughened glass dielectric delivers superior insulation capability, withstanding power frequency voltages and impulse surges while maintaining stable performance across varying climatic conditions.
LXP-40 (U40B) Glass Insulator Radio Influence Voltage (RIV) Data
| Parameter | Value |
| Test Voltage RMS to Ground | 10kV |
| Maximum RIV at 1000 kHz | 50μV |
Packing and Shipping Data
| Parameter | Value |
| Net Weight, Approximate | 1.6kg |
LXP-40 (U40B) Glass Insulator Key Features
Automatic Zero-Value Self-Shattering — When an electrical or mechanical fault occurs, toughened glass self-shatters, leaving the mechanical string intact. Patrol teams can spot defects instantly from the ground without climbing towers or using expensive testing equipment.
Superior Anti-Aging & Weather Resistance — Unlike porcelain or composite materials, toughened glass resists chemical aging, UV radiation, and retains dielectric properties for decades of service.
High Mechanical Strength — The 40kN rated failing load ensures dependable performance under extreme mechanical stress, including heavy ice loading and high wind zones.
Flexible Locking Pin Options — The U40B accommodates either W-pin or R-pin locking mechanisms; R-pin is used as the standard configuration unless otherwise specified.
Hot-Dip Galvanized Hardware — The cap and pin are made from hot-dip galvanized ductile iron and forged steel, assembled with high-strength aluminous cement. A stainless steel split pin secures the coupling of units. An optional zinc sleeve (sacrificial anode) is available for heavy-pollution lines.
LXP-40 (U40B) Glass Insulator Applications
- 10kV–35kV overhead power transmission and distribution lines
- Railway electrification systems
- Industrial power grids and substations
- Urban and rural power network construction
- HVDC overhead transmission lines (Glass Insulator variants)
Why Choose LXP-40 (U40B) Glass Insulator TCI Insulators?
TCI Insulators is a trusted manufacturer of composite and porcelain insulators, serving global utilities and contractors since 2002. With state-of-the-art testing facilities and rigorous quality assurance processes, TCI conducts comprehensive product tests including ultraviolet aging, hardness, flame-retardant, tracking, and leakage current tests according to national and international standards.
Our disc suspension insulator system supports mechanical and electrical loads from 10,000 to 50,000 lbs, available across all voltage levels for both distribution and transmission systems, fully compliant with IEC standards.
LXP-40 (U40B) Glass Insulator Related Products
- LXP-70 (U70BL) Ball & Socket Disc Suspension Insulator — 70kN rated, for 33kV–66kV lines
- LXP-100 (U100BL) Ball & Socket Disc Suspension Insulator — 100kN rated, for high-voltage transmission
- Porcelain Disc Suspension Insulators — U40B through U300B IEC class range
- Composite Hollow Insulators — For instrument transformers and circuit breakers
Internal Links:
- TCI Insulators Homepage
- Disc Suspension Insulators
- Porcelain Disc Suspension Insulators
- Composite Hollow Insulators
- Contact TCI Insulators
External Links:
- IEC 60383-1 — Insulators for Overhead Lines
- GB/T 1001.1 — Chinese National Standard for Insulators
- BS 3288 Part III — British Standard for Insulator Connections
All specifications are subject to change without notice. For the most current technical data and pricing, please contact TCI Insulators directly at www.tcinsulators.com.
