Type 2 surge arrester BR-25GR 1+1

type 1class Ifor electrical installations

Features: · Type 1 Class I surge protector. · Status indication. · Uc: 385V / 275V. · Iimp: 25kA / 50kA. · Maximum discharge current (8/20us): 100kA. · Pole number: 1+1NPE. · BR-25GR 1+1NPE surge arrester is suitable for TT and TN-S system. Application： · Protect against direct hit of lightning strokes of medium intensities. · Suitable for protection of electrical installations against transient overvoltage caused by direct and indirect lightning strikes or switching processes. · Mainly to main distribution boards, for protection against impact of direct or indirect lightning strikes in wide range of applications – houses, office or industrial buildings, resp. to sub-distribution boards in large buildings. Advantage： · High discharge capacity. · Low let-through voltage. Installation： · Type 1 or Type 1+2 SPD (Iimp ≥ 12.5 kA) compulsory at the installation source (main distribution board in secondary buildings). · Installations more than 10 m high (apartment buildings, office buildings, hotels, etc.): type 2 SPD recommended for protecting private areas and floor distributors (communal areas) in addition to a type 1 or type 1+2 SPDs.