Data and information technology - OBO Bettermann

Terms for HF technology and installation instructionsPlanning aid, surge protection of data and information technologyCut-off frequency f gThe cut-off frequency f gdescribesthe frequency-dependent behaviourof the arrestor. Capacitiveand/or inductive component propertiesensure signal damping athigher frequencies. The criticalpoint is described as the cut-offfrequency f g. From this point onwards,the signal has lost 50% (3dB) of its input power. The cut-offfrequency is determined accordingto certain measuring criteria. Usually,in the absence of any values,the cut-off frequency relates to socalled50 Ω systems.Installation instructionsThe surge protection device mustbe connected as close as possibleto the device to be protected. Thehousing of the device to be protectedshould if necessary be definedas a local earthing point. Inaddition, care should be taken toensure short PE line distancesfrom surge protection device toearthing point (housing) − linelength max. 0.5 m.Limit frequency, 1 = |A|, 2 = 3 dB, 3 = f g, 4 = fInstallation instructions: 1 = ISDN, 2 = Net Defender02 TBS-Katalog_2010_Neuer_Stand / en / 30/03/2010 (LLExport_00986)46 OBO TBS