Nomal Type Suspension Insulators
01
40KN U40B Disc Suspension Porcelain Insulator
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product description
Ordinary insulators are suitable for general areas. Properly increasing the number of insulators can also improve the pollution flashover performance. Disc suspension porcelain insulator is a special insulation control, which can play an important role in overhead transmission lines.
High voltage line pollution resistant disc-shaped suspension porcelain insulator is suitable for industrial dust, chemical industry, saline alkali, coastal and foggy areas. It is used for insulation and fixed conductors on high-voltage overhead transmission and distribution lines. It is generally assembled into insulator strings for power lines in different voltage levels and different pollution areas.
Suspension disc insulator
Standard: Typically complies with IEC 60383, GB/T 1001 (depending on region).
Mechanical Strength: 40 kN (Ultimate Tensile Load).
Material: High-alumina porcelain (excellent dielectric & mechanical properties).
Creepage Distance: ~200–400 mm (varies by design; optimized for pollution resistance).
Voltage Rating: Used in 11 kV to 765 kV systems (multiple discs can be串联 for higher voltage).
Design Features:
Ball-and-socket or clevis-and-tongue coupling for string assembly.
Smooth glaze finish to reduce contamination buildup.
Primary Usage
This insulator is designed for:
Overhead transmission lines (suspending conductors from towers).
Dead-end & tension applications (where mechanical load is critical).
Substation busbar & equipment support.
Harsh environments (coastal, industrial, or high-pollution areas).
Key Advantages
(1) High Mechanical Strength (40 kN Load Capacity)
Withstands heavy conductors (e.g., ACSR, AAAC) and extreme weather (ice, wind).
Reliable in long-span transmission lines (e.g., river crossings, mountainous areas).
(2) Excellent Electrical Performance
Low leakage current due to high-quality porcelain.
High puncture resistance (no internal cracking under high voltage).
(3) Pollution & Weather Resistance
Glazed surface prevents water absorption & contamination.
Long creepage path reduces flashover risk in polluted areas.
(4) Durability & Long Service Life
Resists UV degradation, corrosion, and thermal cycling.
Maintenance-free for decades (unlike polymer insulators in some conditions).
(5) Modular Design
Multiple discs can be connected in strings for higher voltage lines (e.g., 220 kV, 500 kV).
specification
| Ball and socket type suspension porcelain insulators( IEC Class ) | ||
| Type | XP-40 | |
| IEC Class | U40B | |
| Coupling size | 16 | |
| Dimensions | ||
| Diameter(D) | mm | 190 |
| Spacing(H) | mm | 140 |
| Leakage distance | mm | 200 |
| Mechanical Values | ||
| Combined M&E strength | kn | 40 |
| Impact strength | N.m | 5 |
| Routine proof test load | kn | 20 |
| Electrical Values | ||
| power frequency dry withstand voltage | kv | 55 |
| power frequency wet withstand voltage | kv | 30 |
| Dry lightning impulse withstand voltage | kv | 75 |
| Power frequency puncture voltage | kv | 90 |
| Radio influence Voltage Data | ||
| Test voltage RMS to ground | kv | 7.5 |
| Maximum RIV at 1000kHz | μv | 50 |
| Packing and Shipping Data | ||
| Net weight,approximate | kg | 2.8 |
| Color | Brown | |
