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load break switch

24kV Air-Compression Load Break Switch, VACF12-24kV

VACF12-24kV
Delivery:
FOB
minimum order:
1 piece
Quantity:
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1. General description
    VACF12-24kV series M.V. air type load break switch and its combination apparatus are used for AC 24kV, 50Hz indoor M.V. switchgear. The specific technical parameters of the load switch are high and the action is reliable. The operating mechanism is basically formed as manual spring energy storage type, and it can also be equipped with electromagnetic spring operating mechanism. Based on the principle of air pressure arc extinguishing, it can be broken many times without replacing arc extinguishing tube.
   Under normal circuit conditions, the M.V. load switch can turn on, carry and turn off load current, and has the ability to turn on short-circuit current and bear short-circuit current at a specified time. M.V. load switch is suitable for installation in-ring network switch cabinet and other types of switch cabinet for receiving and distributing electric energy.
   VACF 12-24kV series load break switch can be equipped with grounding switch. The grounding switch has the same short-circuit closing capacity as the load switch, so as to enable and dynamic thermal stability, and has strict mechanical interlock with the load switch, so as to ensure no misoperation in structure.
   M.V. load switch is suitable for installation of in-ring network switch cabinet and other types of switch cabinet for receiving and distributing electric energy.


2. Main technical parameter

Item

Unit

Data

Rated voltage

kV

24

Rated frequency

Hz

50

Rated current

A

630

Maximum rated current of fuse

A

80

Rated active load breaking current

A

630

Rated closed-loop breaking current, rated short-time withstand current(2s)

kA

20

Rated short-circuit making current, rated peak withstand current

kA

50

1 min power frequency withstand voltage,phase to phase and to ground/fracture

kV

65/79

Lightning impulse withstand voltage(peak value) phase to phase and to ground/break

kV

125/145

Rated cable charging breaking current

A

16

Mechanical life

times

2000

Rated service break current

A

1050

Rated short circuit breaking current of fuse

kA

31.5

Phase distance

mm

300±3

Total stroke of conducting rod

mm

290±5

Opening distance between dynamic and static arc contact at opening position

mm

>215

Electric contact over travel of moving contact rod

mm

42±3

Loop resistance

μΩ

≤300

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