V 20-C/...: Surge protection device Type 2 (Class C) to VDE 0675 part 6-11 (DIN EN 61643-11) with acoustic signalling.? Complete unit consisting of upper part and base, pre-mounted and ready for connection? With acoustic signalling for function monitoring, signal tone can be shut down for 24 h? VDE-tested? Suitable for TN and TT network systems? Plug-in upper part; upper part can be separated from base without tools? Including thermal and dynamic separating device? With visual display of defects? High current conductivity and long service life
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