Type 1 50kA 3 phase lightning arrester

FV50B/4-xxx S

- Type 1 50kA 3 phase lightning arrester,
- With indication window and remote control contacts,
- Unique designing, patent technology,
-Used in the lightning protection zones concept at boundary LPZ0B-LPZ1,
-The core parts are multilayer spark gap with high discharge capacity,
-35mm2 DIN-rail in accordance with EN 50022/DIN46277-3,
-Low residual voltage.
-Protection mode: L1, L2, L3-PE, N-PE.

10/350us 50kA test video (FV50B/1-275S), please click here

1.Dimension of surge arrester FV50B/4-xxx S

2.Electrical parameters of surge arrester FV50B/4-xxx S

Model No.   FV50B/4-150S FV50B/4-255S FV50B/4-275S FV50B/4-320S FV50B/4-385S
Test class according to IEC61643-11:2011 I
Type of Network TT-TN-IT
Nominal voltage UN 110/220V 220/380V
Rated Voltage (Max. Cont. Operating Voltage) Uc 150VAC 255VAC 275VAC 320VAC 385VAC
Impulse current (10/350μs) Iimp 50kA 50kA 50kA 50kA 50kA
Nominal discharge current (8/20μs) In 50kA 50kA 50kA 50kA 50kA
Voltage protective level at 25kA Up ≤1.8kV ≤1.8kV ≤1.8kV ≤2.0kV ≤2.0kV
Isolation resistance Risol >102 >102 >102 >102 >102
Response time tA ≤100ns ≤100ns ≤100ns ≤100ns ≤100ns
Recommended back-up fuse 500A
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
Disconnection indicator Mechanical indicator (Green: OK, Red: replace)
Remote control contact Yes
Color gray

3. Test record photo

10/350us 50kA test video (FV50B/1-275S), please click here

4. Installation of surge arrester FV50B/ 4-xxx S


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