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Product Description

FN7-24 is used in triphase AC power network of AC 50Hz, rated voltage 24KV for breaking load current and controlling short-circuit current.
FN7(C)-24 type H.V. load switch and fuse box is based on the FN7-24 series H.V. load switch with operating mechanism, making the installation more simpler. It meets orders needs.

Normal service condition
1. The ambient air temperature: MAX.: +40°C, Min.: -10°C.
2. The altitude does not exceed 1000m.
3. The relatire humidity of air daily average ≤90%, monthly average ≤ 95%.
4. The ambient air should not be obviously polluted by corrosivity or the flammability gas and steam. etc.
5. The working situation without frequent violent.

Specification

Model

FN7-12

FN7-24

Rated Voltage

12KV

24KV

Rated Frequency

50/60Hz

50/60Hz

Rated Current

630A

630A

Rated Short Circuit Closing Current

50KA

50KA

Rated Peak Withstand Current (Dynamic Steady Current)

50KA

50KA

Rated Short-Time Withstand Current(Thermally Stable Current)

1s

31.5KA

25KA

2s

20KA

25KA

3s

18KA

16KA

Max. breaking capcity in co-operation with fuse

1600A

900A

Max.fuse current

200A

200A

1 min Power Frequency Withstand Voltage(Effective Value)Ground and Phase

to earth and between poles

42KV

65KV

across isolating distance

48KV

79KV

Lightning Impulse Withstand Voltage(Peak) 1.2/50 μs

to earth and between poles

75KV

125KV

across isolating distance

85KV

145KV



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