Solid-Core Post Insulators

At Winwin Speciality Insulators (WSI), we take immense pride in being one of the foremost manufacturers of Solidcore post insulators in India. With a commitment to excellence, innovation, and the highest industry standards, we have established ourselves as a trusted name in the electrical insulation industry.

Our Diverse Applications

At WSI, we are not just keeping pace with industry requirements; we are setting new standards.

Height and Diameter Flexibility for Your Unique Needs

At WSI, we understand that each project in the electrical industry has its own set of demands. That's why we are dedicated to offering flexible solutions when it comes to our solid-core insulators.

Height Versatility

Our commitment to adaptability is exemplified by the wide height range of our single-part insulators. Height starting from a modest 190 mm, our single-part insulators can reach towering heights of up to 1900mm. For insulators greater than 1900mm, we provide multiple-part configurations, ensuring that our products seamlessly integrate with the unique specifications of your projects, providing you with the versatility you need.

Diameter Strength

In addition to height flexibility, our solid-core insulators boast core diameters of up to 210mm. This robust design allows our solutions to confidently handle substantial mechanical loads, ensuring the reliability and durability of your electrical systems.

Creepage Distance Expertise

We recognize the critical role of creepage distance in insulator performance. WSI insulators are meticulously designed to provide creepage distances of up to 35mm per kV, assuring optimal electrical insulation even in the most challenging environmental conditions. For specialized applications, our team can customize creepage distances to precisely match your project requirements.

Innovating for Tomorrow

At WSI, innovation is at the core of our mission. We are currently in the development phase of a Single-part Solidcore Post Insulator with an impressive height of 2300mm. This innovation is aimed at meeting the specific requirements of 220 kV solid-core insulators without the need for stacking, further enhancing the efficiency and performance of your projects.

Stringent Quality Assurance

Quality is our top priority. Each and every insulator produced at WSI factory undergoes thorough inspection, adhering to both national IS (India standard) / IEC (International standard). We also strictly follow the customer specification. This commitment to quality control guarantees that our products meet the highest industry benchmarks, ensuring safety and reliability in every application.

WSI Product Range

IEC Designation Units C4-325 C6-325 C8-325 C10-325
Cantilever Strength (upright) kN 4 6 8 10
Rated Voltage kV 66 66 66 66
Total Height mm 770 770 770 770
Max. Diameter of Insulating Part mm 191 201 222 245
Top Metal Part Diameter mm 160 160 160 160
Bottom Metal Part Diameter mm 160 160 160 175
Top Pitch Circle Dia. mm 127 127 127 127
Number of Holes and Hole dia. mm 4 x M16 4-M16 4 x M16 4 x M16
Bottom Pitch Circle Dia. mm 127 127 127 127
Number of Holes and Hole dia. mm 4 x M16 4-M16 4 x M16 4 x M16
Total Creepage Distance mm 1850 1850 1850 1850
Dry Power Frequency Withstand Voltage kV 170 170 170 170
Wet Power Frequency Withstand Voltage kV 140 140 140 140
Impulse Withstand Voltage Positive kVp 325 325 325 325
Impulse Withstand Voltage Negative kVp 325 325 325 325
Dry Power Frequency Flashover Voltage kV 200 200 200 200
Wet Power Frequency Flashover Voltage kV 170 170 170 170
Impulse Flashover Voltage Positive kVp 350 350 350 350
Impulse Flashover Voltage Negative kVp 375 375 375 375
RIV Test Voltage kV 46 46 46 46
Maximum RIV ?V 200 200 200 200
Visible Discharge Voltage kV 53 53 53 53
Tensile Strength kg 5000 6000 6000 6000
Torsion Strength kgM 200 250 300 400
Compression Strength kg 10000 12000 12000 12000
Weight (approximate) kg 32 33 39.5 41.5
IEC Designation - C6-450 C4-550 C6-550
Cantilever Strength (upright) kN 6 4 6
Rated Voltage kV 66 110 110
Total Height mm 1020 1220 1220
Max. Diameter of Insulating Part mm 187 220 242
Top Metal Part Diameter mm 160 160 160
Bottom Metal Part Diameter mm 160 220 240
Top Pitch Circle Dia. mm 127 127 127
Number of Holes and Hole dia. mm 4 x M16 4 x M16 4 x M16
Bottom Pitch Circle Dia. mm 127 178 200
Number of Holes and Hole dia. mm 4 x M16 4 x 18 4 x 18
Total Creepage Distance mm 2000 3400 3400
Dry Power Frequency Withstand Voltage kV 200 250 250
Wet Power Frequency Withstand Voltage kV 185 230 230
Impulse Withstand Voltage Positive kVp 450 550 550
Impulse Withstand Voltage Negative kVp 450 550 550
Dry Power Frequency Flashover Voltage kV 220 280 280
Wet Power Frequency Flashover Voltage kV 200 250 250
Impulse Flashover Voltage Positive kVp 475 570 570
Impulse Flashover Voltage Negative kVp 500 590 590
RIV Test Voltage kV 53 78 78
Maximum RIV ?V 200 200 200
Visible Discharge Voltage kV 53 88 88
Tensile Strength kg 6000 6000 7000
Torsion Strength kgM 350 300 400
Compression Strength kg 12000 12000 14000
Weight (approximate) kg 47 56.5 67
IEC Designation Units C4-650 C6-650 C4-750
Cantilever Strength (upright) kN 4 6 4
Rated Voltage kV 132 132 154
Total Height mm 1500 1500 1700
Max. Diameter of Insulating Part mm 223 234 229
Top Metal Part Diameter mm 160 160 160
Bottom Metal Part Diameter mm 240 240 240
Top Pitch Circle Dia. mm 127 127 127
Number of Holes and Hole dia. mm 4 x M16 4 x M16 4 x M16
Bottom Pitch Circle Dia. mm 200 200 200
Number of Holes and Hole dia. mm 4 x 18 4 x 18 4 x 18
Total Creepage Distance mm 3625 3625 4500
Dry Power Frequency Withstand Voltage kV 340 340 390
Wet Power Frequency Withstand Voltage kV 275 275 325
Impulse Withstand Voltage Positive kVp 650 650 750
Impulse Withstand Voltage Negative kVp 650 650 750
Dry Power Frequency Flashover Voltage kV 360 360 410
Wet Power Frequency Flashover Voltage kV 340 340 375
Impulse Flashover Voltage Positive kVp 700 700 800
Impulse Flashover Voltage Negative kVp 725 725 825
RIV Test Voltage kV 92 92 108
Maximum RIV ?V 200 200 500
Visible Discharge Voltage kV 92 92 108
Tensile Strength kg 6000 7000 6000
Torsion Strength kgM 300 300 300
Compression Strength kg 12000 14000 12000
Weight (approximate) kg 64.5 73 75.5
IEC Designation - C4-1050 C6-1050 C8-1050 C8-1175
Cantilever Strength (upright) kN 4 6 8 8
Rated Voltage kV 220 220 220 220
Total Height mm 2300 2300 2300 2650
Max. Diameter of Insulating Part mm 244 261 272 285
Top Metal Part Diameter mm 160 160 160 160
Bottom Metal Part Diameter mm 240 265 295 295
Top Pitch Circle Dia. mm 127 127 127 127
Number of Holes and Hole dia. mm 4 x M16 4 x M16 4 x M16 4 x M16
Bottom Pitch Circle Dia. mm 200 225 254 254
Number of Holes and Hole dia. mm 4 x 18 4 x 18 8 x 18 8 x 18
Total Creepage Distance mm 6125 6125 6125 7600
Dry Power Frequency Withstand Voltage kV 490 490 490 560
Wet Power Frequency Withstand Voltage kV 460 460 460 460
Impulse Withstand Voltage Positive kVp 1050 1050 1050 1175
Impulse Withstand Voltage Negative kVp 1050 1050 1050 1175
Dry Power Frequency Flashover Voltage kV 510 510 510 590
Wet Power Frequency Flashover Voltage kV 490 490 490 560
Impulse Flashover Voltage Positive kVp 1100 1100 1100 1250
Impulse Flashover Voltage Negative kVp 1150 1150 1150 1300
Wet Switching Surge Withstand Voltage kV 750 750 750 850
RIV Test Voltage kV 156 156 156 156
Maximum RIV ?V 500 500 500 500
Visible Discharge Voltage kV 156 156 156 156
Tensile Strength kg 6000 7000 8000 8000
Torsion Strength kgM 300 300 400 400
Compression Strength kg 12000 14000 16000 16000
Weight (approximate) kg 123 144 168 196.5

KEY FEATURES

  • UNMATCHED MATERIAL QUALITY

    WSI post insulators are crafted using high-strength alumina porcelain, ensuring the utmost durability and reliability. This choice of material underlines our dedication to delivering products that not only meet but exceed expectations, making them ideal for the most demanding electrical applications.

  • VERSATILE RANGE FOR VARIED APPLICATIONS

    WSI extensive product portfolio caters to a wide spectrum of applications, including power plants, substations, and distribution networks for supporting bus bars and conductors, isolator applications, switchgear products, pantograph applications, and capacitor bank support etc., WSI post insulators are engineered to excel in diverse scenarios.

  • MEETING DIVERSE ELECTRICAL INDUSTRY NEEDS

    At WSI, we recognize the ever-evolving demands of the electrical industry. To cater to a wide spectrum of requirements, our product range spans from 12 kV to 800 kV, ensuring that our solutions are tailored to meet both standard applications and specialized projects.

  • EXPANDING THE LIMITS

    In our pursuit of excellence, we are currently in the developmental stages of cutting-edge 1200 kV Solidcore Post Insulators. This underscores our commitment to innovation and our dedication to providing high-quality, reliable products that push the boundaries of electrical infrastructure capabilities.

Learn About our World of Product

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