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Pole mounted Substation

Pole mounted Substation. PIN TYPE INSULATORS.

rachelrichardson
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Pole mounted Substation

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  1. Pole mounted Substation

  2. PIN TYPE INSULATORS As the name suggests, the pin type insulator is secured to the cross arm on the pole. There is a groove on the upper end of the insulator for housing the conductor. The conductor passes through this groove and is bound by the annealed wire of the same material as the conductor.

  3. A single pin type insulator is used to transmit voltages up to 11 kV (kilovolts) and higher voltages require two-, three- or four piece pin insulators. They are not economically feasible for 33 kV and higher transmission lines. Pin type insulators are secured with steel or lead bolts onto transmission poles. These are typically used for straight-running transmission lines.

  4. SUSPENSION TYPE INSULATORS For high voltages (>33 kV), it is a usual practice to use suspension type insulators shown in Figure. consist of a number of porcelain discs connected in series by metal links in the form of a string.

  5. Suspension type transmission line insulators suspend and support high voltage transmission lines. They are cost effective for higher voltage transmission, typically replacing multiple pin type insulators. Suspension type insulators have a number of interconnected porcelain discs, with each individual unit designed to support a particular voltage.

  6. STRAIN TYPE INSULATORS When there is a dead end of the line or there is corner or sharp curve, the line is subjected to greater tension. In order to relieve the line of excessive tension, strain insulators are used. For low voltage lines (< 11 kV), shackle insulators are used as strain insulators. ELECTRICAL POWER SYSTEM-1 (2150908)

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