Modular Housings - Kube Engineering

Isolation AmplifiersTransmittersIndicatorsProcess AnalyticsPortable MetersLaboratory MetersSensorsFittingsDiscourseElectrical isolationin industrial measuringtechnologyIntroductionl––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– –––––––In industrial plants, the transmissionof measuring and controlsignals almost always requireselectrical isolation of the signalsbeing processed both for safetyreasons and in order to achieveoptimum signal quality(see Fig. 1).1000 V DCShunt 60 mVMAMeasurements at dangerouslyhigh voltages or in areas wherethere is an explosion hazard,different ground potentials(see Fig. 2) for example, inplant sections located a longway apart, as well as highcommon-mode voltages do notallow direct connection of themeasuring signals with otherdevices or assemblies. In thiscase, it is absolutely essential toelectrically isolate the transmittedsignals.Knick offers suitable componentsfor electrical isolation in variousdesigns to meet these requirements.Our range includes modularhousings, M12 field housingswith IP68 protection, solder-inmodules, and Eurocards.Depending on the model, theappropriate measuring signalsare also amplified or convertedto the standard values 10 V or20 mA. Voltages of a few mVup to 3000 V and currents ofa few µA up to 10 A can be0 V■ Fig. 1: Isolation of dangerous high voltagesShuntM1000 V DC60 mVP1I interferetransmitted or converted with ahigh level of accuracy.On the following pages the mostimportant technical terms usedin specifications and productdescriptions will be explainedV interfere■ Fig. 2: Avoiding interference caused by differences in potentialAP2to facilitate assessment andselection of suitable equipment.10