Summary
FKN12A-12D pneumatic load switch, FKRN12A-12D series pneumatic load switch with fuse box, suitable for 12KV and below the three-phase distribution system, as the control and protection of transformer, cable, overhead line electric power equipment in substation and substation terminal; especially suitable for urban and rural power networks. It is also suitable for the control and protection of the ring network and double radiation power supply unit.
The FKN12A-12D series of air pressure load switches can be divided into load current and overload current.
The FKRN12A - 12D series of pressure - type load switch - fuse combiner can be divided into load current, overload current and short circuit current.
Model meaning
The spring mechanism is divided into manual operation spring mechanism and electric operating spring mechanism.
Use of environmental conditions
Upper limit of ambient air temperature: the lower limit of +40 C is -25 C
The height of the sea is not more than 1000m.
The daily average value of relative humidity is not more than 95%, and the average monthly value is not more than 90%.
The earthquake intensity is not more than 8 degrees.
There is no fire, explosion danger, chemical corrosion and violent vibration.
Filth grade: II
Structural characteristics
On one frame, load switch, grounding switch, fuse and mechanism can be combined flexibly, compact structure, small volume, easy to install and easy to install.
The fracture is a direct moving arrangement, and the dynamic and thermal stable current parameters are high, and the operation is completed in one time.
With a static contact insulation cover, the ring net cabinet is isolated on the structure. It saves the interphase insulation clapboards, and breaks the insulation plug-in boards, so as to prevent the arcing short circuit accident in the cabinets.
It has a unique valve structure, after the load switch is divided, the valve automatically segregates the fracture, and has 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 and DC dual purpose operation power supply, which can facilitate the realization of the power system: "three remote" requirement.
Main technical parameters
FKN12A-12D side loading right operation
Side flip right operation
FKRN12A-12D side mounted right operation, side flip left operation
Side flip right operation, side loading left operation
