Line post insulators

At WINWIN Speciality Insulators (WSI), we take pride in our meticulous adherence to ANSI standards when manufacturing Line Post Insulators.

These insulators are crucial components in electrical distribution systems, and our commitment to quality ensures their reliability and performance. Line post insulators provide electrical insulation and mechanical support to the conductors, helping maintain the integrity and reliability of the electrical grid.

Our Diverse Applications

WSI offers a range of Line Post Insulators that serve a number of critical applications including:

  • VOLTAGE RANGE 11 KV TO 33 KV DISTRIBUTION LINES:

    WS comprehensive range of Line Post Insulators covers the voltage range from 11 kV to 33 kV, making them suitable for a wide spectrum of distribution line applications. We can also offer insulator for rating above 33 kV based on customer requirement. Whether you're managing lower or higher voltage systems, we have the right solution to meet your needs.

  • EXPERIENCE THE WS ADVANTAGE:

    At WS, we don't just meet industry standards; we set them. Our commitment to quality, precision manufacturing, and customer satisfaction makes us the preferred choice for Line Post Insulators. Trust in WS products to ensure the integrity and performance of your distribution systems. Contact us today to discuss how WS Line Post Insulators can meet your specific needs and elevate the performance of your electrical infrastructure.

Types of Line Post Insulators

Vertical Tie Top with Base and Spindle

Designed for secure vertical mounting, these insulators provide dependable support and insulation in your distribution systems.

Vertical Clamp Top with Base and Spindle

Offering versatile vertical clamping capabilities, these insulators are engineered to meet the demands of various distribution setups.

Horizontal Clamp Top with Base and Spindle

These insulators provide robust horizontal clamping, ensuring the stability and efficiency of your distribution lines.

Horizontal Clamp Top with Gain Base

Engineered with a gain base for horizontal applications, these insulators deliver reliable performance and ease of installation.

Custom Solutions

In addition to our standard offerings, we can provide customized Line Post Insulators tailored to your specific requirements.

WSI Line Post Insulators Range

ANSI Reference Number Units 57-1 57-2 57-3
Rated Voltage kV 11 22 22
Cantilever Strength (upright) lbs (kN) 2800 (12.5) 2800 (12.5) 2800 (12.5)
Mounting Arrangement - Vertical Vertical Vertical
Top Fixing Arrangement - Tie Top Tie Top Tie Top
Total Height (H) mm 229 305 381
Max. Diameter of Insulating Part (D) mm 140 152 165
Spindle Size - 3/4'' BSW 3/4'' BSW 3/4'' BSW
Total Creepage Distance mm 356 559 737
Dry Power Frequency Flashover Voltage kV 70 100 125
Wet Power Frequency Flashover Voltage kV 50 70 95
Impulse Flashover Voltage Positive kVp 120 160 200
Impulse Flashover Voltage Negative kVp 120 160 200
RIV Test Voltage kV 15 22 30
Maximum RIV µV 100 100 200
ANSI Reference Number Units 57-4 57-5 57-6
Rated Voltage kV 22 33 33
Cantilever Strength (upright) lbs (kN) 2800 (12.5) 2800 (12.5) 2800 (12.5)
Mounting Arrangement - Vertical Vertical Vertical
Top Fixing Arrangement - Tie Top Tie Top Tie Top
Total Height (H) mm 432 508 597
Max. Diameter of Insulating Part (D) mm 178 191 203
Spindle Size - 3/4'' BSW 3/4'' BSW 7/8" BSW
Total Creepage Distance mm 1016 1143 1346
Dry Power Frequency Flashover Voltage kV 140 160 180
Wet Power Frequency Flashover Voltage kV 110 130 150
Impulse Flashover Voltage Positive kVp 230 265 300
Impulse Flashover Voltage Negative kVp 230 265 300
RIV Test Voltage kV 44 44 44
Maximum RIV µV 200 200 200
KETCH A FOR LINE POST 57-16 TO 57-26 - TABLE 3
KETCH B FOR LINE POST 57-16 TO 57-26 - TABLE 3
ANSI Reference Number Units 57-16 57-26
Rated Voltage kV 33 33
Cantilever Strength (upright) lbs (kN) 2800 (12.5) 2800 (12.5)
Mounting Arrangement - Vertical Horizontal
Top Fixing Arrangement - Clamp Top Clamp Top
Total Height (H) mm 622 635
Max. Diameter of Insulating Part (D) mm 203 203
Spindle Size - 7/8" BSW 7/8" BSW
Total Creepage Distance mm 1346 1346
Dry Power Frequency Flashover Voltage kV 180 180
Wet Power Frequency Flashover Voltage kV 150 150
Impulse Flashover Voltage Positive kVp 300 300
Impulse Flashover Voltage Negative kVp 300 300
RIV Test Voltage kV 44 44
Maximum RIV µV 200 200

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