Indoor disconnectors, loadbreak and earthing switches

Indoor earthing switches with making proof capability QZR

Earthing switches (short-circuiter) type QZR with short-circuit making capacity are operationally easy switching devices used indoors in high voltage substations or in switchgear cabinets. The earthing switch is with instantaneous movement of the main contacts to the on position, which provides guaranteed making capacity. They can be used as a safety device in the input fields HV switchgear.

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    Technical information

  • Rated voltage
    1 – 25 kV
  • Rated shorttime current 1s (3s)
    16 – 100 kA
  • Rated dynamic current
    40 – 250 kA
  • Rated frequency
    50 Hz (16 Hz, 60 Hz)
  • Mechanical endurance
    2000, 5000, 10000 C-O
  • Minimum lifetime (years)
    40
  • Electric class endurance
    E1, E2, E+
  • Drive type
    Hand drive, Hand drive via gearbox, motor drive
  • Motor type
    12V DC, 24V DC, 48V DC, 60V DC, 110V DC, 220V DC, 230V AC, 400V AC
  • Signaling positions
    Limit switches per position, placed direct on main device shaft, Auxiliary cam-switch (high switch capacity)
  • Insulators type
    Epoxy resin, porcelain (upon request

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