FKRN12-12D / FKN12-12D High Voltage AC Air Pressure Pneumatic Load Break Switch Manufacturer

• Specification
• Technical Parameters

• FKRN12-12D / FKN12-12D Air Pressure Pneumatic Load Break Switch Product Overview

  FKRN12-12D series pneumatic type load switch, fuse combination electric appliance can divide load current, overload current, the broken wire short circuit current.  This switch is applicable to 12 kv and below three phase power distribution system, as the transformer, cables, overhead line and power equipment control and protection;  Especially suitable for city network, site of the terminal substation and box transformer substation. And suitable for ring network, double radiation power supply unit control and protection.

  FK(R)N series of product design and manufacturing load the following standards:
  GB3804 “3-63 kv AC high voltage load switch”
  GB16926 “AC high voltage load switch fuse combination electric”
  GB1985 “AC high voltage isolation switch and earthing switch”
  IEC265 the rated voltage above 1 kv and below kv high-voltage switch”
  IEC420 “AC high voltage load switch – fuse combination electric”

  

  Three action principle and operating sequence
  1. Manual operation: switching: operating handle into the operation chain parts of load switch spindle hole according to the panel tip rotation direction,spindle drive the four connecting rod energy storage mechanism make closing spring is compressed, when the agency had dead center, tripping device of gusset plate trip, in closing spring, under the action of switch quickly closing.
  Break-brake: reverse direction rotary operating handle, spindle drive the energy storage mechanism rotation, the energy storage mechanism of self-locking device was points brake lever to unlock, in points brake spring, under the action of switch quickly points brake. Manual mechanism can also fit on electromagnetic shunt tripping device, points brake is just by turning on the power supply.

  2. Electric operation: to electric mechanism and power, as long as a switch or points brake instruction, can automatically load switch and fuse combination electric close, break-brake operations. In addition, electric mechanism side is equipped with shunt tripping device, need points brake, switch on the power, also can finish points brake wipe European oh.

  3. Grounding switch operation: Insert the operating handle into the main shaft of the grounding switch operating chain assembly, according to the panel tip rotation direction can, but the size of hard to be applied to ensure closing in place. Points gate instead. This series of product has compact structure, reasonable design, reliable chain, insulation level high characteristic; Spring energy storage operation mechanism make points, closing speed from operators operating force size influence; Arc in the bell insulated enclosure put out, arc of free gas will not lead to alternate with or to reduce the strength of insulation. Bell insulating cover lower safety barrier, the closure from the charged part, kicked the dog the ring network cabinet protection level, the copper tungsten alloy arc touch off and plum flower form the main contact, make the switch to point is reliable, electric long life. This series of product maintenance easy, easy to operate, reliable operation.

  Normal working condition

  1. The surrounding air temperature is not higher than +40 ℃, no less than -25 ℃.
  2. No more than 1000 m above sea level.
  3. Relative humidity: daily mean no more than 95%, on average no more than 90%.
  4. The surrounding air from corrosive or combustible gas and water vapor and obvious pollution.
  5. No regular violent vibration.

• FKRN12-12D / FKN12-12D Load break switch technical parameters

  

  FKRN12-12D / FKN12-12D Air pressure pneumatic load break switch dimension reference

  

  Structural features:
  1.Load switch, earth switch, fuse and mechanism are on one frame, which can be flexibly combined, compact structure, small volume, convenient and easy installation;
  2.The disconnectors are of direct-acting arrangement, with high dynamic and thermally stable current parameters, and the operation is completed in one time;
  3.With static contact insulation cover, so that the ring network cabinet in the structure of the isolation, eliminating the phase insulation partition, the breakout insulation insert, can prevent the cabinet arc light short circuit accident;
  4.With different live door structure, the back door automatically isolates the breakout after the load switch is tripped, with good protection;
  5.There is a reliable mechanical locking device between load switch, grounding switch and fuse, which meets the requirements of “five-proof”;
  6.It has two forms of manual operation and electric operation with AC and DC operation power supply, which is convenient for realising the requirement of “three remotes” of the power system.

   

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