Class B spark gap surge arrester

FV25B/1-255S


-Lightning surgearresters with compact construction design,
- With indication window,
- With remote control contacts,
-Used in the lightning protection zones concept at boundary LPZ0B-LPZ1,
-The core parts are spark gap with high discharge capacity,
-35mm2 DIN-rail in accordance with EN 50022/DIN46277-3,
-Low residual voltage and quick response.
-Protection mode: L-N / L-PE.
1.Dimension of surge arresterFV50B/1-255S



3.Electrical parametersofsurge arresterFV25B/1-255S

Model No.

FV25B/1-255S

Test class according to IEC61643-1:2005

I

Nominal voltage

UN

230VAC,50(60)Hz

Max. Cont. Operating Voltage)

Uc

255VAC

Impulse Current (10/350μs)

Iimp

25kA/Pole

Nominal discharge current (8/20μs)

In

25kA/Pole

Voltage protective level at In

Up

1.5kV

Response time

tA

100ns

Recommended back-up fuse

250A

Protection mode

L-N

Follow current extinguish capacity

3kA

Temporary Over voltage

334V min. for 05 secs.

I/O Connections

By screw terminal:10-35mm2

By connection bus

Mounting

Symmetrical rail (EN50022/DIN46277-3)

Operation temperature range / RH

-25~+85 /95%

Degree of protection

IP20

Encapsulated

Encapsulated

Housing material

UL94V0

Remote control contact

Yes

Indication

Internal / Mechanical

Color

Gray

Inquiry

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