Busducts in air insulation types ELPO, PELPO

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  • power generators leads in power stations, heat & power plants,
  • industrial plants and factories,
  • connections of electrical equipment in high short-circuit systems.

General characteristics

  • reliable and economical power installations for voltages from to 36 kV and rated current to 7 kA (ELPO) and 5kA (PELPO),
  • both indoor and outdoor application,
  • natural cooling,
  • degree of protection up to IP 65,
  • design with:
    • pressurized dry air,
    • space heaters,
    • requested support structures incl. GCB platforms.


  • shaped conductors (Al 99,5 or AlMgSi 0,5) placed on support insulators inside one common self-supporting enclosure,
  • dismountable connections (rigid and flexible) to auxiliary equipment and apparatus, prefabricated transport elements (up to 12 m) delivered on site used to connect electrical equipment, expansion joints, t-offs etc. creates a complete transmission-distribution line,
  • self-supporting aluminum enclosure.


  • silicone bushing insulators,
  • electrical apparatus enclosed in special housings.


  • modern technology of design, manufacture and erection make it possible to fit the busduct to individual requirements of the Client,
  • self-supporting structure reduces the number of supporting points (decreases the investment cost),
  • enclosure/conductor expansion joints compensate the linear extension forces of busducts,
  • maintenance manholes for access to insulators, bolted connections and apparatus,
  • corrosion resistance,
  • environmental friendly.


  • manufacture and erection of MV ELPO/PELPO busducts since 1975,
  • installed ELPO sections on 5000 m routes in single installation site,
  • thousands of meters of busduct currently in operation in Poland and abroad,
  • complete generator connections in almost every Polish power station and many abroad (South America, Europe, Africa, Asia, Australia).

Cross-section of NSPB-ELPO typeCross-section of NSPB-PELPO type

  1. post insulator
  2. conductor
  3. enclosure
  4. manholes


Technical data

Bus type   ELPO PELPO
Maximum nominal of rated insulation voltage kV up to 36
Maximum nominal of rated current kA up to 7 up to 5
Compliance with standards   IEEE C37.23-2015; PN-EN 62271-1: 2009, IEC 62271-1: 2009, PN-EN 60865-1: 2002, IEC 60865-1,
PN-EN 60529: 2003, IEC 60529: 2003
ELEKTROBUDOWA SA carries out research and development works to improve the isolated-phase bus design.
Product range of ELPO/PELPO is constantly updated and extended.

Product card in pdf formatBusducts in air insulation types ELPO, PELPO plik .pdf

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