As a core insulating component of power transmission and distribution systems, this product is widely adopted in various high-voltage power scenarios worldwide, with proven performance in thousands of utility and industrial infrastructure projects. The 45kV–220kV High Voltage Insulator performs the dual core functions of electrical insulation and mechanical load-bearing, serving as an indispensable component to ensure the safe and stable operation of high-voltage systems.
In 45kV, 72.5kV, 110kV and 220kV high-voltage overhead transmission lines, the insulator acts as the core insulation barrier between live conductors and transmission towers. It is extensively applied to suspension and strain towers, effectively isolating live conductors from earthed towers to prevent earth leakage and phase-to-phase flashover. Meanwhile, it steadily withstands mechanical loads such as conductor self-weight, ice coating and wind force, fully adapting to complex field installation environments including plains, mountainous areas and regions with high lightning density.
In 110kV–220kV outdoor high-voltage substations and power plant step-up stations, the insulator is widely used with equipment such as high-voltage disconnectors, circuit breakers, busbar posts and transformer bushings. As a post insulation and conductor support component, it maintains a safe insulation clearance between high-voltage live parts and steel structures or switchgear cabinets, prevents flashover accidents caused by overvoltage, and ensures the stable operation of substation equipment.
In photovoltaic, wind power and other renewable energy step-up stations, the insulator is installed at step-up transformer outgoing lines, high-voltage busbar structures and grid connection bays. It withstands voltage fluctuations and instantaneous overvoltage impacts from renewable power generation, providing reliable insulation protection for high-voltage renewable energy grid-connected systems.
In self-built high-voltage distribution systems of large industrial facilities such as metallurgical, chemical and urban rail transit facilities, the insulator adapts to harsh environments with industrial dust, salt spray and corrosive gases. It is used for insulation protection of high-voltage distribution devices, indoor and outdoor structures and equipment leads, meeting the insulation requirements for continuous high-voltage power supply in industrial and mining enterprises.
Backed by industry-leading material technology and fully compliant with IEC 60383 international standards, the 45kV–220kV High Voltage Insulator offers six core advantages for global power infrastructure projects.
With a scientifically designed creepage distance, the insulator adopts high-performance insulating media (porcelain, glass, silicone rubber composite) with excellent voltage withstand capability. It can withstand continuous rated high voltage, as well as lightning and switching overvoltage impacts. Boasting high surface flashover voltage and low risk of breakdown and leakage, it firmly safeguards the insulation safety of high-voltage systems.
With precision structural design and strict mechanical strength testing, the High Voltage Insulator exhibits excellent tensile, bending and overturning resistance. It can steadily bear external loads including conductor self-weight, wind, snow, ice coating and earthquakes, and is not prone to fracture or deformation. It fully meets the stringent requirements for the erection of long-span high-voltage lines and the fixed installation of substation equipment.
The insulator features superior surface hydrophobicity and outstanding aging resistance. It can withstand extreme temperatures ranging from -40°C to +60°C, intense UV radiation, salt spray, sand erosion and industrial chemical corrosion. It maintains stable insulation performance in high-altitude, coastal and heavily polluted areas, greatly reducing the risk of pollution flashover.
Whether made of porcelain, glass or composite materials, the insulator adopts a sealed manufacturing process with a compact internal structure free of air gaps, avoiding moisture ingress and performance degradation. Key components are treated with anti-corrosion technology, delivering a service life of 15–30 years in outdoor environments with minimum maintenance requirements.
Featuring standardized specifications, the insulator is compatible with conventional line fittings and mature installation processes, enabling simple and efficient on-site disassembly and replacement. It has a long maintenance-free cycle, eliminating frequent cleaning and routine inspections during daily operation, and significantly reducing labor and material costs for the operation and maintenance of high-voltage lines and substations.
Covering the full voltage range from 45kV to 220kV, the insulator meets diverse installation requirements including suspension, strain, post and wall-through applications. It can be perfectly matched with various high-voltage equipment such as high-voltage disconnectors, surge arresters and transformers, adapting to a wide range of high-voltage scenarios including transmission lines, substations and industrial distribution systems.
For power grid operators, renewable energy project developers and large industrial end-users, the 45kV–220kV High Voltage Insulator is a reliable and long-lasting solution to enhance system stability, mitigate operational risks and optimize overall lifecycle costs.
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10-550kV Porcelain Post Insulators |
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|
New product model |
Reference old model |
Voltage Class (kV) |
Bending load |
Torsional load |
Nominal Creepage Distance (mm) |
Overall Height (mm) |
Upper Mounting Hole Dimension n1-d1-a1 |
Lower Mounting Hole Dimension n2-d2-a2 |
Weight kg |
|
New standard No. |
Old standard |
System voltage |
Cantilever |
Torsion |
Leakage |
Height |
Top bolt |
Bottom bolt |
Weight |
|
C12.5-95-440 |
ZSW-12/12.5-4 |
10 |
12.5 |
6 |
440 |
255 |
4-M12-Φ76 |
4-14-140 |
9 |
|
C12.5-125-744 |
ZSW-24/12.5-4 |
20 |
12.5 |
6 |
744 |
350 |
4-M12-φ140 |
4-18-φ210 |
14 |
|
C60-150-744 |
ZSW-24/60-4 |
20 |
60 |
10 |
600 |
440 |
6-φ18-φ250 |
6-φ18-φ250 |
46 |
|
C12.5-250-1620 |
ZSW-40.5/12.5-4 |
35 |
12.5 |
4 |
1620 |
560 |
4-M16-Φ127 |
4-M16-Φ127 |
29 |
|
C70-250-1620 |
ZSW-40.5/70-4 |
35 |
70 |
25 |
1620 |
600 |
8-Φ20-Φ275 |
8-Φ20-Φ275 |
90 |
|
C12.5-325-2260 |
ZSW-72.5/12.5-4 |
66 |
12.5 |
4 |
2260 |
770 |
4-M16-φ127 |
4-M16-φ127 |
50 |
|
C120-325-2100 |
ZSW-72.5/120-3 |
66 |
120 |
60 |
2100 |
700 |
8-Φ18-φ325 |
8-Φ18-φ325 |
153 |
|
C6-550-3150 |
ZSW-126/6-3 |
110 |
6 |
4 |
3150 |
1220 |
4-M16-φ127 |
4-M16-φ127 |
57 |
|
C8-550-3150 |
ZSW-126/8-3 |
110 |
8 |
4 |
3150 |
1220 |
4-M16-Φ127 |
4-M16-Φ127 |
60 |
|
C12.5-550-3150 |
ZSW-126/12.5-3 |
110 |
12.5 |
6 |
3150 |
1220 |
4-M16-4127 |
8-18-254 |
80 |
|
C12.5-550-3910 |
ZSW-126/12.5-4 |
110 |
12.5 |
6 |
3910 |
1220 |
4-M16-Φ127 |
8-φ18-φ254 |
90 |
|
C16-550-3910 |
ZSW-126/16-4 |
110 |
16 |
6 |
3910 |
1220 |
4-M16-Φ127 |
8-φ18-Φ254 |
96 |
|
C40-650-4495 |
ZSW-145/40-4 |
132 |
40 |
10 |
4495 |
1500 |
8-φ18-φ325 |
8-φ18-325 |
243 |
|
C36-750-5270 |
ZSW-170/36-4 |
167 |
36 |
15 |
5270 |
1700 |
8-φ18-φ275 |
8-Φ18-325 |
258 |
|
C8-1050-7820 |
ZSW-252/8-4 |
220 |
8 |
4 |
7820 |
2400 |
4-M16-Φ127 |
8-φ18-φ250 |
178 |
|
C12.5-1050-7812 |
ZSW-252/12.5-4 |
220 |
12.5 |
6 |
7820 |
2300 |
4-M16-Φ127 |
8-18-4254 |
218 |
|
C40-1050-7800 |
ZSW-252/40-4 |
220 |
40 |
20 |
7820 |
2300 |
8-18-4300 |
8-φ18-4356 |
430 |
|
C4-1175-7500 |
ZSW-252/4-3 |
220 |
4 |
3 |
7500 |
2650 |
4-M16-Φ127 |
4-18-φ225 |
145 |
|
C4-1175-9300 |
ZSW-252/4-4 |
220 |
4 |
3 |
9300 |
2650 |
4-M16-Φ127 |
4-Φ18-Φ225 |
175 |
|
C6-1175-7500 |
ZSW-252/6-3 |
220 |
6 |
3 |
7500 |
2650 |
4-M16-Φ127 |
8-Φ18-Φ254 |
171 |
|
C6-1175-9300 |
ZSW-252/6-4 |
220 |
6 |
3 |
9300 |
2650 |
4-M16-Φ127 |
8-Φ18-Φ254 |
192 |
|
C8-1175-7595 |
ZSW-252/8-3 |
220 |
8 |
6 |
7595 |
2650 |
4-M12-Φ140 |
4-φ18-φ250 |
207 |
|
C12.5-1175-9300 |
ZSW-252/12.5-4 |
220 |
12.5 |
8 |
9300 |
2650 |
4-M16-Φ127 |
8-Φ18-Φ254 |
283 |
|
C30-1175-9300 |
ZSW-252/30-4 |
220 |
30 |
15 |
9300 |
2650 |
8-φ18-φ300 |
8-φ18-φ356 |
420 |
|
C12.5-1550-11200 |
ZSW-363/12.5-4 |
330 |
12.5 |
10 |
11260 |
3350 |
8-Φ18-Φ254 |
8-φ18-4325 |
414 |
|
C16-1550-11260 |
ZSW-363/16-4 |
330 |
16 |
10 |
11260 |
3350 |
8-φ18-φ225 |
8-φ18-φ356 |
446 |
|
C20-1550-11260 |
ZSW-363/20-4 |
330 |
20 |
12 |
11260 |
3500 |
8-φ18-φ225 |
8-φ18-φ356 |
508 |
|
C12.5-1950-17050 |
ZSW-550/12.5-4 |
500 |
12.5 |
10 |
17050 |
4400 |
4-Φ18-φ225 |
8-φ18-φ325 |
821 |
|
C16-1950-17050 |
ZSW-550/16-4 |
500 |
16 |
8 |
17050 |
4400 |
4-Φ18-Φ225 |
8-Φ18-φ356 |
633 |
|
C10-1950-13750 |
ZSW-550/10-3 |
500 |
10 |
4 |
13750 |
4700 |
4- φ18- 中225 |
8-φ18-φ300 |
511 |
|
C16-2100-17050 |
ZSW-550/16-4 |
500 |
16 |
10 |
17050 |
4700 |
4-Φ18-φ254 |
8-φ18-Φ325 |
774 |
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