Make Proof Earthing Switch

Make Proof Earthing Switch
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RITTER Starkstromtechnik

Make proof earthing switch 7,2 to 36 kV list 2 up to 125 kA:

  • Small-sized design
  • Spring-snap-action
  • Switching angle 90°C
  • Manual and motor drive can be mounted on the left or on the right side
  • Suitable for all usual types of operating mechansim
  • Low torques for on- and off-switching
  • Small maintenance effort
  • Available with insulator with integrated capacitive transducer

RITTER make proof earthing switches type “EDS” are suitable for the installation in type tested indoor switchgears according to IEC 298.

The rated insulation level values assigned to the rated voltage of the make-proof-earthing-switches, please refer to table shown below. These relate to normal air conditions (1013 mbar, 30°C, 11 g/m3 humidity of the air) as per VDE 0670, Part 6 and/or IEC 694, i. e. sea level.

Make Proof Earthing Switch Type Tests

The type ”EDS“ make proof earthing switches have passed the following type tests:

  • Dielectric tests to demonstrate the insulation level, including tests with AC-voltage at the auxiliary circuits
  • Tests to demonstrate the carrying capacity of the rated surge current and of the rated short-time current
  • Tests to demonstrate the rated short-circuit making current
  • Tests to demonstrate the mechanical working order and the mechanical reliability.

Auxiliary Contacts for Signal Elements

Auxiliary switches and auxiliary circuits are rated for a permanent current of 10 A. The auxiliary switches are capable of cutting out 2 A with 220 V DC with a minimum time constant of 20 ms. The auxiliary switches are arranged on the frame of the earthing switch and are adequately protected from arcs of the main circuits by the sheet-metal cover.

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