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MER 25 is an SPD for protection against partial direct and indirect lightning strikes.
Protective element is MOV.
MER 25 is intended for protection in zones OA-1.
Location of use: main distribution boards
MER 25 / 320V Clas I,II – IEC; Class B – VDE
Type: MER 25 / 320V
Certified under; tested to: UL 1449,(UL file E213469); IEC – 61643-1
Class (IEC): I, II
Max permitted operating voltage: 335V
Nominal discharge current (8/20) In: 70kA
Max discharge current (8/20) Imax: 150kA
Max discharge current (10/350) Iimp: 25kA
Protection level Up – at Iimp (10/350): 1.2kV
Response time tA: <25 ns
Back –up fuse (if mains is > 250A): 250Agl
Short – circuit capability to: 25kA / 50Hz
Temperature range: -40ºC ……+80ºC
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Pages from PROTEC Z LV the universal solution for transient switching protection for LV motors
