summary:

FKN12A-12D compressed air load switch, FKRN12A-12D series compressed air load switch - fuse combination appliance, applicable to 12kV and below three-phase power distribution system, used for control and protection of transformers, cables, overhead lines and other power equipment; Especially suitable for terminal substations and box-type substations of urban and rural power grids. It is also applicable to the control and protection of ring network and double radiation power supply unit.

FKN12A-12D series pneumatic load switch can open and close load current and overload current.

FKRN12A-12D series pneumatic load switch - fuse combination device can open and close load current, overload current and break line short circuit current.

Normal use environment

◇ Upper limit of ambient air temperature:+40 ° C lower limit - 25 ° C

◇ The sea level shall not exceed 1000m;

◇ The daily average value of relative humidity is not more than 95%, and the monthly average value is not more than 90%.

◇ The seismic intensity shall not exceed 8 degrees;

◇ Places without fire, explosion, chemical corrosion and severe vibration;

◇ Pollution level: II

main features

◇ The load switch, grounding switch, fuse and mechanism can be flexibly combined on one frame, with compact structure, small volume and convenient and simple installation;

◇ The fracture is arranged in a direct-acting manner, with high dynamic and thermal stability current parameters, and the operation can be completed at one time;

◇ With static contact insulation cover, the ring-network cabinet is structurally isolated, and the interphase insulation partition board and fracture insulation plug board are omitted, which can prevent arc short circuit accidents in the cabinet;

◇ It has a special valve structure. After the load switch is opened, the valve will automatically isolate the fracture, with good protection performance;

◇ There is a reliable mechanical locking device between the load switch and the grounding switch and fuse to meet the "five prevention" requirements;

◇ There are two forms of electric operation with manual operation and AC/DC dual-purpose operation power supply, which is convenient to realize the power system: "three remote" requirements.