Elevated durability. (ix) Suspension and tension hardware shall be suitable for insulator with nominal pin shank diameter of either 16 mm. Say 11kv. In case of suspension insulators… - Published on 24 Nov 15. a. Near the tower or starting of the insulator. In the transmission and distribution systems, six different types of insulators are used. Suspension Insulator is also known as Disc Insulator. Advantages Of Suspension Insulators. Suspension type insulator being economical as compared to pin type insulator for high voltage overhead transmission line; Each insulator disc is designed to operate for 11KV. Porcelain disc insulators are made into disc shape,that’s why it got this name.The disc insulator has metal fittings on both ends,usually seen as ball and socket type,and also there are tongue and clevis type coupling. If one disc can sustain an 11kv … P.S.R. The number of discs in series will vary with vary in working voltage. Several pieces of ceramic disc insulators are connected together to make up a insulator … There are two types of construction in disc insulators (1) Cemented cap type and (2) Hewlett or interlinking type. Insulator Types. Features: Accurate dimensions. hence for any operating voltage, a string of insulators can be used. Hence, depending upon the working voltage, desired number of discs can be connected in series to form an insulator string suitable for particular voltage. d. None of these. Murty, in Electrical Power Systems, 2017 4.3 Suspension Type or Disc Insulators. Each unit of disc is designed for a low voltage, say 11 kV. Additionally, these disc insulators are provided at affordable rates. These six types of insulators are selected on the bases of voltage rating. Porcelain disc insulators. b. Normal porcealin suspension insulator, fog type ceramic disc insulator, composite tension insulators, silicone rubber suspension insulators, polymer long rod insulators, and glass suspension insulators … In this type, each insulator disc is symmetrically placed and conforms to electrostatic lines of force. for example, for 66kv 6 number of discs are required. Same at all points. Mar 26, 2015 - Suspension insulator is the main parts of transmission and distribution overhead lines of power system. Materials such as porcelain or glass are used in the manufacture of these insulators. Each insulator can have multiple insulating discs. As pin type insulators in more than 33kv are not suitable for use as they increase in weight and size. A number of porcelain discs are connected in series to form this insulator. Suspension type insulator. string Disc insulator with normal (B) type disc insulator having electro mechanical strength of 120KN shall be used. With a pin insulator the conductor is connected to the insulator and is above the crossarm. or 20 mm. The voltage capacity of this insulator ranges from 11 kV to 765 kV. Each unit disc is designed for low voltage. Precisely designed. as per approved 12KV Class Disc insulator to be utilised at sub-station. This is the most recent type of construction and it permits the disc to be formed out of quite thick porcelain thereby allowing the disc to be of one piece only. c. Near to the conductors. The maximum voltage of the disc type insulators is at. Specifications: Nomenclature11 kV/70 KN Normal Disc Insulators (T&C Type)Type of InsulatorsType "B"Mechanical failing load70 KNStandard specification to which If the voltage is 33 KV then three disc is required in series. Which type of Insulators used in Power System? The other important advantage is that it has high puncture strength.
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