Harting Sbírka katalogů říjen 2013

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Vydal: HARTING s.r.o. Autor: HARTING

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Here, transient overvoltages not have taken into consideration,but because special demands placed this equipment with regard the safety and availability and the networks that depend it, overvoltage remains factor for consideration.1.3 Degree pollution (based VDE 0110-1 and IEC 60664-1) The micro-environment determines how contamination affects the insulation. This circumstance has led the specification minimum clearance distances.g.Insert 161 4. Domestic electrical appliances are included this category, for example. This includes equipment connected overhead lines, e.6. This includes equipment for permanent installations, e. 4.1. Overvoltage category IV Equipment intended for operation plants, parts thereof, where transient overvoltage has taken into consideration. with surge arrestors).g.2 Overvoltage categories Equipment divided into one the following excess voltage categories: Overvoltage category I Equipment intended for use devices parts plants where overvoltages cannot occur, which are protected with suitable measures against such overvoltages (e.g. . Small clearance distances can bridged completely solid particles, dust or water. Overvoltage category III Includes equipment intended for the operation plants parts thereof.6. Macro-environment:Environment room other location which the equipment installed operated. However, the macro-environment should also considered. rule, contamination becomes conductive when mixed with water. Overvoltage category II Equipment intended for operation plants, parts thereof, where transient overvoltages not have taken into consideration; but where overvoltages caused operation equipment may occur. Equipment this overvoltage category primarily operated low voltage. Micro-environment: Immediate surrounding the insulation, which especially influences the creepage distance rating. control devices, meters. protective devices, contactors, switches and outlets. Contamination caused water, soot, metal coal dust is always conductive