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sales service hotline:0532-58517159

sales service hotline:0532-58517159

    126kv intelligent combination electrical appliance

      zw20-12 outdoor post mounted vacuum circuit breaker

      overview

      ​ the zw20-12 outdoor column mounted vacuum circuit breaker is a three-phase ac 50hz, 10kv outdoor high-voltage switchgear mainly used in medium voltage overhead power grids, as well as in industrial and mining enterprises, power plants, and substations. it is used for breaking and closing load currents, overload currents, and short-circuit currents. this product adopts vacuum arc extinguishing method and sf6 gas insulation. the insulation sleeve of the incoming and outgoing lines is integrally cast with epoxy resin and silicone rubber. to reduce the switch volume, corner sleeves are used for phase a and c to ensure good external insulation.

      performance characteristics

      can be equipped with spring operating mechanism or permanent magnet operating mechanism

      meet the high reliability and maintenance free requirements of smart grid equipment

      comply with national standard gb1984 and international electrotechnical commission standard iec62271-100

      it can cooperate with intelligent controllers to form intelligent switches such as intelligent circuit breakers

      disconnectors

      reclosers

      etc.

      main electrical parameters of column mounted circuit breaker

       

      project

      unit

      parameter

      switch model

       

      zw20-12

      rated voltage

      kv

      12

      1min power frequency withstand voltage

      kv

      42 (phase to phase, ground) 48 (isolation fracture)

      lightning impulse voltage (full wave)

      kv

      75 (phase to phase, ground) 85 (isolation fracture)

      rated current

      a

      630

      short time withstand current for 4 seconds (effective value)

      ka

      20、25

      rated peak withstand current

      ka

      50、63

      sf6 gas leakage rate

      %/year

      0.1

      institutional type

       

      spring mechanism, permanent magnet mechanism

      overall dimensions (width * height * depth)

      mm

      1189*775*819

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