Retrofit

Retrofit switchgears

Retrofit switchgears have optimal application in medium voltage transformer stations and 12 (7.2) kV electrical switchgears in industry. Advantages of retrofit:

  • Quick renovation of breaking elements
  • Extends switchgear life
  • Possibility of partial replacement of equipment
  • Minimum maintenance requirements for new switching equipment
  • Requires a minimum voltage-free state
  • Reduces investment costs

RETROFIT TYPE-2

Switchgear with fixed low-oil switches BNR drives, on pull-out trolleys, Cell type NS900 Energoinvest, etc.

Retrofit is performed by installing a fixed switch on a stand with flexible connections to an existing or replaced conductive insulator – connector. Lever elements are attached to perform the function of locks to prevent erroneous manipulations, according to the appropriate standard. Equipment for protection, monitoring and management is installed in the LV cabinet. Instrument transformers have been replaced and installed in the same position.

RETROFIT TYPE-3

Switchgear with fixed low-oil switches BNR drives on pull-out trolleys, Cell type NS900 Energoinvest, etc.

Retrofit is performed by reconstructing the pull-out part by installing a cassette in which a pull-out switch (contactor) can be installed, which is brought into the operating and extended position by the drive of the helical spindle. The cassette can be with or without earthing switch, and is equipped with movable metal screens via contact terminals and locks to prevent erroneous manipulations with the earthing switch and switch. Equipment for protection, monitoring and management is installed in the LV cabinet. Instrument transformers have been replaced and installed in the same position.

RETROFIT CELL TYPE EDR-900

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