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FV25B/4-***S

Product catalog summary

Specifications:
The document outlines the specifications for a surge protective device used in low-voltage power systems. It includes details on remote control contact, signal access range, and recommended wire specifications for both AC and DC systems. For AC, the maximum voltage is 250V with a current of 0.5A, using single-core wire up to 1.5mm. For DC, the maximum voltage is 60V with a current of 0.1A, using multi-core wire up to 1.3mm. Models without 'S' do not have remote control contact functionality.

Model Information:
The models listed are FV25B/4-150(S), FV25B/4-255(S), FV25B/4-275(S), FV25B/4-320(S), and FV25B/4-385(S). They are tested under IEC/EN/VDE Class I/B standards and are suitable for TT and TN network types. The protection mode includes L1, L2, L3, N-PE.

Electrical Characteristics:
Nominal voltage is 110V/220V ac or 220V/380V ac, with rated voltages (UC) ranging from 150V ac to 385V ac. The impulse current (Iimp) is 25kA, and the nominal discharge current (In) is also 25kA. The voltage protective level (Up) is ≤1.6kV for most models, with some at ≤1.8kV. The response time is ≤100ns, and the recommended back-up fuse is 315A. Isolation resistance is greater than 10 MΩ.

Installation and Operation:
The device uses multi-core wire connections for L-N and PE, with specific wire size recommendations. It mounts on a 35mm symmetrical rail (EN50022/DIN46277-3). The operational temperature range is -40℃ to +80℃, with humidity between 30% and 90%, and altitude up to 3000m. The degree of protection is IP20, and the housing material is UL94 V-0. A mechanical indicator shows the disconnection status (Green: OK, Red: replace).

Additional Features:
The device features a unique seal construction with a multilayer spark gap, preventing spark emission outside the housing. It includes a working status indication window and optional remote control contacts. The maximum continuous operating voltage options are 150V, 255V, 275V, 320V, and 385V. It is mainly used in lightning protection zones (LPZ) 0 to 1, suitable for building entrance lines, elevators, and mineral applications. The device is a 3-phase, 4-pole system.

Catalog excerpts

Surge Protective Device for Low-voltage Power System ♦ Adopt unique designed seal construction with multilayer spark gap, no spark emission outside the housing. ♦ With working status indication window, and remote control contacts. ♦ Max.continuos operating voltage(Uc)150V~,255V~, 275V~,320V~,385V~for your option. ♦ Mainly used in lightning protection zone (LPZ) 0 to 1, widely used in building entrance lines elevator, mineral, and so on. ♦ 3 phase,4 poles. Remark: if the model number is without“S”, the model is without remote control contact function

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