FV25B/3+NPE-255S Type 1 AC surge protective deviceSurge Arrester

FV25B/3+NPE-255
FATECH FV25B/3+NPE-255S is a Type 1 AC surge protective device for 3+NPE low voltage power distribution systems. As a Class I lightning surge arrester, it can discharge high impulse lightning current and limit overvoltage effectively to protect main distribution boards, industrial power equipment, commercial buildings and infrastructure. With stable performance, high discharge capacity and DIN‑rail installation, this SPD ensures safe and reliable operation for residential, commercial and industrial applications.

-Type 1+2 25kA@10/350us 1 phase lightning arrester.

-With indication window and remote control contacts.

-Unique designing, patent technology.

-Used in the lightning protection zones concept atboundary LPZ0B-LPZ1.

-The core parts are multilayer spark gap with high discharge capacity.

-Low residual voltage.

-Protection mode: L-N,N-PE.

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FV25B/3+NPE-255S

UN:220/380V

UC:275V

In:25kA

Iimp:25kA

Up≤1.5kV

1. Dimension of surge arrester FV25B/3+NPE-255S

2.Electrical parameters of surge arrester

Model. No. FV25B/3+NPE-255(S)
Test class IEC/EN/VDE Class I+II/B+C/T1 T2
Type of Network TT
Protection modes L-N,N-PE
Nominal Voltage 50（60）Hz UN 230/440V
Rated Voltage (Max. Cont. Operating Voltage) UC 255V
Impulse current (10/350us)[L – N]/[N – PE] limp ≥25/100kA
Nominal discharge current (8/20us) [L – N]/[N – PE] In ≥25/100kA
Voltage protective level Up ≤1.5kV
Response time tA ≤100ns
Recommended back-up fuse 315A
Isolation resistance ＞102MΩ
I/O Connections Multi core wire:16mm2~25mm2, Single core wire:16mm2~35mm2
Mounting Symmetrical rail (EN50022/DIN46277-3)
Operation temperature range/humidity/altitude -40°C~+80°C / 30%~90% / 3000m
Degree of protection IP20
Housing material UL94V-0
Disconnection indicator Mechanical indicator (Green: OK, Red: replace)
Remote control contact Optional