LHX - LSC2B

Primary Distribution

MEDIUM VOLTAGE AIR-INSULATED SWITCHGEARS

12 - 17,5 - 24 KV

Medium Voltage switchgears for indoor installations; metal enclosure and metal partitions segregate the compartments from each other and the live parts are air-insulated. Highly modular switchgear makes simple selection of components required by any application. All the installation, operation and maintenance operations can be carried out from the front of the unit. Circuit breakers - contactors and earthing switches are operated from the front with door closed.

Download the type LHX catalogue
Download the catalogue

ELECTRICAL CHARACTERISTICS

  • Rated voltage up to 24 kV
  • Test voltage at ind. freq. up to 50 kV x 1’
  • Impulse withstand voltage up to 125 kV
  • Rated frequency 50/60 Hz
  • Rated short circuit duration up to 50 kA
  • Peak current up to 125 kA
  • Rated main bus-bar current up to 4.000 A
  • Rated circuit-breakers current ≤ 2.500 A
  • Higher ratings with forced ventilation

APPARATUS

The switchgear can be equipped with: :

  • vacuum circuit-breakers with mechanical or magnetic actuator,
  • sf6 gas circuit-breakers
  • vacuum contactors with fuses

DEGREE OF PROTECTION ( IEC 60529 )

  • Up to IP4x on the outer doors closed
  • IP2x for segregation between compartments.

COLOUR OF THE EXTERNAL SURFACES

RAL7035 - light grey
( front doors and side sheets).
Other colours on request.

NORMAL OPERATING CONDITIONS

The rated characteristics are guaranteed under the following ambient conditions: Ambient Temperature : min – 5 °C\ max.+40°C Ambient humidity:

  • max. 24 h average of relative humidity 95%
  • max. monthly average of rel. hum. 90%

Water Vapour Pressure:

  • max. 24 h average = 2.2 kPa
  • max. monthly average = 1.8 kPa

  • Non-corrosive, uncontaminated atmosphere
  • Operational altitude up to 1,000 m above sea level

( for higher altitudes, apply the correction factors set out in IEC 62271-1 )