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Switchgears in air insulation RSN-12

Application

The switchgear is intended for use in distribution stations in the companies producing, transferring and using electricity. The switchgear is designed to ensure safe and proper operation, inspection and maintenance operations.
It meets the requirements of the standards PN-EN 62271-200, PN-EN 62271-1 and GOST, and is produced with the IP4X protection rating according to PN-EN 60529. It is intended for use in normal conditions, specified with the standard PN-EN 62271-1.

Features

  • A simple and efficient blockade system
  • Galvanised sheet plate structure, riveted
  • A metal case secured integrally and divided into sections
  • Shifting the unit slid from the test / disconnection position to the operating position, which results in withdrawable moving walls and uncovering contacts, thus allowing connection of switch contacts
  • A fast earthing switch, with the capacity of short-circuit activation in all feeders
  • The earthing switch fitted with a manual or power activator; its status is signalled with the position indicator
  • Large space for use during the installation of cable terminals
  • The door window to view mechanical indicators of the position of the disconnecting switch and the activator status
  • The insulators made of epoxy resins, set on support insulators in the bus connection bay
  • Flanges with insulators are the elements that support busbars. Outgoing buses are connected to the busbars, which enter the post bushing insulators separating the bus section from the connection terminal area

Operational conditions

  • Installation altitude up to 1,000 m ASL
  • No need to compensate for vibration from external factors or earthquake
  • No significant pollution with salt, steam, dust, smoke, flammable or corrosive gases
  • No icing, frosting and dew
  • Relative air humidity:
  • – the highest average within the day: 95%
    – the highest average within the month: 90%
    – the highest average steam pressure within the day: 2,2 kPa
    – the highest average steam pressure within the month: 1,8 kPa

  • Ambient temperature:
  • – the highest short-term temperature +40°C
    – the highest average within the day +35°C
    – the highest annual average + 20°C
    – the lowest long-term temperature + 25°C

Parameters

  • Nominal voltage 7, 2;12 kV
  • Rated continuous current for busbars and incoming feeders 400, 630, 1000 A
  • Nominal frequency 50 Hz
  • Rated short-time withstand current 16, 20, 25, 31,5 kA/3s
  • Rated peak withstand current 26, 51, 81, 102 kA
  • Highest voltage / Rated short-time withstand voltage of grid frequency / Rated lightning impulse withstand voltage:
    12 kV12/28/75
  • Nominal voltage in auxiliary circuits: Direct current / Alternate current110, 220 / 110, 220 V
  • Auxiliaries transformer25, 40 kVa
  • Breaker switchVB-17 (PRE); VD-4, VM1 (ABB)
  • Current transformersPPB12 (PRE), CTS (KPB-Intra)
  • Voltage transformers TJP (ABB); VTS (KPB-Intra)
  • Surge arresterTJP (ABB); VTS (KPB-Intra)
  • Protection degree according to PN-EN 60529IP2X
  • Base feeder dimensions800x850x2100
  • Weight 250-400 kg

Tested in accordance with the standard

  • PN-EN 62271-200
  • PN-EN 62271-1
  • GOST 1516.3-96
  • GOST 14693-90

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