Load Break Switch (SF6) 2019-08-30T03:48:17+00:00

Load Break Switch (SF6)


Excellent interrupting and insulating abilities of SF6 GAS
Switching on/off the load current of process power distribution line, for division and tapping of lines

  • Reliable Insulation and Interrupting Capacity
    A perfect interruption is guaranteed because of excellent insulation and interrupting capacity of SF6 GAS.
    SF6 GAS is incombustible, so there is absolutely no risk of fire.
    By selecting a Puffer interruption method, where SF6 GAS in a cylinder is compressed, the product shows excellent making and breaking abilities.
    Flash Over due to making/breaking surge and cable loading current, which occurs during vacuum interruption doesn’t occur.
  • Operating Part
    All the point of contact in all planes open and close at the same time. The speed of opening and closing is always the same regardless of operation.
    Automatic switch can be operated not just electronically from the control box, but manually by controls on the body. It can be operated on the spot or via a remote.
  • Water Proof and Rust Prevention
    The body of the switch has been welded with stainless steel and covered with epoxy tar film, making it rust-proof.
  • Compact Design
    A compact design was achieved through SF6 Gas insulation method and simple control, which minimizes the room needed for installation.


 Rated Voltage (kV) 12 / 15 /17.5 24 / 25.8 / 27 36 / 38
Rated current (A) 630 400 630 630
 Rated power frequency (Hz) 60 / 50
Rated short-time withstand current (kA) 25 12.5 16
Rated making current (kV peak) 62.5 32.5 40
Current breaking capacity 100% Load current (A) 630 400 630 630
Loop current (A) 630 400 630 630
Magnetizing current (A) 14 22
Cable-charging current (A) 10 25 20
Line charging breaking current (A) 1 1.5 2
Rated control voltage DC 24V or AC 110V-220V
Number of no-load switching (time) 5,000
Insulation level Power frequency withstand voltage (kV) Phase to ground 36 60(50) 70
Between open contacts 40 60(50) 80
Control circuit to ground 2
Rated lighting impulse withstand voltage (kV) Phase to ground 95 150(110) 170
Between open contacts 105 150(110) 195
Control circuit to ground 6
Rated gas pressure (Mpa) (at 20℃) 0.12 0.12 0.07
Bushing material Porcelain / Polymer Porcelain / Polymer Polymer
Weight (kg) 120 / 100 130 / 110 120
 Gas Capacity(ℓ) 125 135 140
Insulation medium SF6 GAS
Operating method Auto / Manual
 Applied standard IEC 62271-103, KEPCO spec.(ES-5925-0003)