Insulators

Our insulators cater to the entire spectrum across sub-station and transmission & distribution segment. We specialize in the production of high strength equipment porcelains for use in SF6 circuit breakers, instrument transformers, condenser bushings, dis-connectors as well as insulators for traction system of the Indian Railways, and high-end transmission products up to 1200 kV voltage level.

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Solid core station post insulators

Solid Core Station Post Insulators are comparatively lighter and have smaller diameters than other types of post insulators of similar voltage class. These are ideally suitable for compact installations, which results in slim & neat appearance and provide better harmony with other modern apparatus in any EHV/UHV substation. Additionally, they display superior antipollution performance, low RIV, better arc resistibility and lower deflection under cantilever load

  • Rating: Up to 1200 kV
  • Applicable standards: IS, IEC, ANSI

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Traction Insulators for Railway Electrification

Traction insulators are 25 KV OHE insulators manufactured for Indian Railways. These are solid core insulators suitable for normal and polluted zones and are designed as per RDSO specifications.

  • Rating: up to 25 kV
  • Creepage distance: 25 mm/kV and 31mm/kV
  • Applicable standards: IS, IEC, RDSO specifications

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Apparatus porcelain insulators

The design concept for hollow porcelains depends on the complete design of electrical equipment viz. circuit breakers, instrument transformers, condenser bushing or lightning arresters.

The design is finalized in consultation & close coordination with the equipment manufacturers so as to achieve desired electrical and mechanical requirements, and comply with dimensional tolerances as per Indian and international standards

  • Hollow Core insulators with or without metal flanges for application in circuit breakers, instrument transformers, condenser bushings, and lightning arresters up to 800 kVvoltage level
  • Maximum height in one unit construction: up to 2600mm
  • Maximum outer diameter: 750 mm
  • Bore can be parallel, taper or barrel as per customer specific design
  • Applicable standards: IS, IEC, European norms 50062, ANSI

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Silicone (RTV) Coated Insulators

Room temperature vulcanizing (RTV) silicone coating on Porcelain insulators, is engineered to provide a highly hydrophobic surface for its entire life, thus limiting leakage current and preventing flashovers due to insulator contamination. The coating is not affected by UV light, corona discharge, chemical contaminants, salt, extreme temperatures or corrosive environments.

The benefits of RTV coated Porcelain insulators are two fold – Sturdiness of Porcelain insulators and pollution performance of Silicone insulators. It also reduces the O&M cost on account of frequent cleaning and washing of insulators in high pollution zones. Standard colour is Clay Grey or White. Customized colours can also be made available.

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Suspension disc Insulators

Suspension insulators (Porcelain Discs) are the most widely used insulators for transmission &distribution lines. Their design varies to suit different types of polluted zones and Electro-mechanical strength as per customer’s requirements

  • Profile: Normal, Semi Fog, Anti Fog, Super Fog and Open Profile
  • Electro-Mechanical strength: Up to 420 KN
  • Creepage distance: Up to 612 mm
  • Applicable standards: IS, IEC, BS, ANSI, Australian specifications

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Pin insulators

Pin insulators of one piece or multi piece construction are widely used in low cost distribution lines. Multi piece construction makes these insulators less vulnerable to damage. A multi piece insulator can normally withstand the line voltage for a considerable time without difficulty, even if one shell is broken.

We offer full range of pin insulators for application in sub-transmission and distribution lines up to a system voltage of 66 kV. These insulators have a creepage path which meets various requirements of pollution.

  • Rating: Up to 69 kV
  • Mechanical strength: Up to 10 KN
  • Creepage distance: Up to 1080 mm
  • Applicable standards: IS, BS, IEC, ANSI, AS, VDE specifications

Cap & Pedestal Post Insulators

Suitable from the point of Interchangeability.

  • Rating: Up to 36 kV for application in 245kV Stack
  • Mechanical strength: Up to 31 KN
  • Creepage distance: Up to 25mm/kV
  • Applicable standards: IS, BS, IEC, ANSI, AS, VDE specifications Suitable from the point of Interchangeability.

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Distribution - 11 kV-45/70 KN, 22 kV- 70 KN, 33 kV-70 KN, 33 kV-10 KN

  • Rating: 11 kV, 22 kV & 33 kV
  • Creepage Distance: 25 mm/kV and 31 mm / kV
  • Mechanical Rating: 10 KN, 45 KN & 70 KN
  • Application: Suspension & Tension applications
  • Applicable Standards: IS, IEC, ANSI
  • Made of composite materials which provides high resistance to moisture, ultraviolet radiation, high temperature & tropical sunshine conditions
  • Light weight , easy to handle & install
  • Excellent hydrophobic performance
  • High resistance to Tracking & Erosion in polluted atmosphere
  • Self-cleaning property due to hydrophobic recovery property
  • Resistance to breakage and vandalism
  • Core rod is made of resin impregnated ECR grade Glass fibers
  • Housing of insulator manufactured using high quality silicone rubber
  • Design & Type Test Reports from NABL Accredited Labs CPRI / ERDA / STRI / KEMA

Transmission - Suspension & Tension Insulators

  • Voltage Rating: 66 kV – 400 kV (Scaling upto 765 kV as well)
  • Mechanical Rating: 45 KN, 70 KN, 90 KN, 120 KN, 160 KN & 210 KN
  • Application: Suspension & Tension applications
  • Creepage distance: 25 mm/kV & 31 mm/kV
  • Applicable Standards: IS, IEC, ANSI, Power Grid
  • Made of composite materials which provides high resistance to moisture, ultraviolet radiation, high temperature & tropical sunshine conditions
  • Highly preferable in heavily polluted environments
  • Light weight, easy to handle & install
  • Insulator sheds of open aerodynamic profile without under ribs
  • Excellent hydrophobic performance
  • High resistance to Tracking & Erosion in polluted atmosphere
  • Tracking Resistance of housing & shed material of Class 1A 4.5 kV
  • Housing of insulator manufactured using high quality silicone rubber
  • Self-cleaning property due to hydrophobic recovery property
  • Resistance to breakage and vandalism
  • Core rod is made of resin impregnated ECR grade Glass fibers
  • Housing of insulators manufactured using high quality silicone rubber from reputed world class manufacturers
  • Insulators are suitable for both bare and protected conductors
  • Suitable for hot line maintenance technique
  • Insulators are capable of withstanding high pressure washing
  • Design & Type Test Reports from NABL Accredited Labs CPRI / ERDA / STRI / KEMA

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