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indoor load break switch

35kV MV Indoor Load Break Switch-Fuse Combination, FN12-35

EXFN12-35kV
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1. General description
  EXFN12 series vacem mv load break switch is widely used in high-voltage power transmission and distribution equipment. Due to its good breaking performance and reliable short-circuit current tolerance, it meet the requirements of any power grid. When the load break switch is used in combination with the current limiting fuse, it can effectively protect the distribution transformer within 1250kVA. After the EXFN12 series reliable medium voltage load break switch is installed in the switchgear and other equipment, it has the following advantages: - The switch can completely separate the busbar compartment and the cable compartment by opening and closing - Since the moving contact moves vertically, the switch can be seen intuitively and grounding opening and closing state. -Because of the fuse holder, the earthing switch is integrally installed on the load break switch. After the load break switch is installed on the equipment, there is no need to debug the fuse and the earthing switch separately. 

2. Technical parameter

Product Type Name

FN12

Rated voltage

kV

12

24

40.5

Rated current

A

630

630

630

Rated frequency

Hz

50/60

50/60

50/60

Rated short-circuit making current

kA Peak.

50

31.5

31.5

Rated peak withstand current

kA Peak.

50

50

50

Short time withstand current

kA eff.

1s

25

3s

20

20

20

Maximum breaking current (when used with fuse)
IEC 62271-105 (IEC 420 1990-11) 

A

2000

2000

1700

Maximum fuse current (xrnt fuse)

A

200

200

100

Rated short-time power frequency withstand voltage 50Hz 1 min:

- Phase to phase, to earth

kV

42

65

95

- Fracture

kV

48

79

110

Rated lightning impulse withstand voltage 1.2/50 μs

- Phase to phase, to earth

kV

75

125

185

- Fracture

kV

85

145

215

Mechanical life

-Load break switch and earthing switch

cycles

2000

2000

2000

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