Overview Terminal rails Terminal rail systems Both active and passive components and intelligent modules are Steel mounted on terminal rails a method which has proven its orth over the years. But it is only after the use of certain consum- Weidmller started developing RoHS-compliant surfaces at a ables which are frequently not taken into consideration that very early stage to meet the requirements of EU directives. This electrical installation is finally completed. In this chapter, users commitment is now paying off because Weidmller products will find a range of terminal rails and profile rails for component comply with the statutory instruments at an early date and installation together with end brackets for holding and isolating provide you, the customer, with the customary, high Weidmller the components. This guarantees firm installation and isolation. quality. All the yellow-passivated surfaces so well known to Weidmller supplies components which show perfect functional users will in future be replaced by terminal rails with the new compatibility. WIN-Q surface finish. This name stands for the Weidmller quality, in other words excellent surface protection and, at the Terminal rails are made of either steel, stainless steel, aluminium, same time, excellent electrical properties. copper or plastic, depending on the area of application. A terminal rail can also be used as a protective conductor bus- Stainless steel bar. Weidmller PE / earth terminals in the W-Series, Z-Series, I-Series, SAK- and AKZ-Series comply with requirements stipu- G Stainless steel is a collective noun for all kinds of steel (alloys) lated in IEC 60 947-7-2. According to VDE 0100 part 540, for 2 which are smelted in a special process and have a high degree conductors with cross-sectional areas exceeding 10 mm , both of purity. Stainless steel has much-enhanced resistance to cor- protective and neutral conductors may be grouped together as rosion. Weidmllers stainless steel terminal rails have the follow- a single category of conductors designated PEN. ing composition: X5 CrNi 18-10 stainless steel (i.e. ~ 18 % chro- mium, ~ 10 % nickel). If a terminal rail is used as a PEN busbar, the following criteria must be observed: Aluminium Only E-Cu or aluminium profiles are allowed Aluminium is second only to copper in its electrical conductivity. Short-circuit currents and thermal rated currents must be One advantage is its light weight. Aluminium oxidises quickly in taken into account air thus passivated, it offers excellent corrosion protection. The terminal rails are to be insulated as a contribution to protective insulation Copper Copper, a heavy metal, has the best electrical conductivity of all metals used. As it is a soft metal, Weidmllers terminal rails are 2.3 mm thick. Plastic The plastic terminal rail scores on two counts: firstly, its insulat- ing properties, and secondly, its low weight. This leads to its use in special applications where, for example, clearance and creep- age distances with respect to the mounting plate cannot be achieved with the standard terminal rails. G.24 AccessoriesOverview Terminal rails All unperforated terminal rails can be provided with TS 15 fixing holes (state dimensions h and l2). Possible diameters are 3.5 / 5.6 / 5.5 / 7 mm. U 15 mm All unperforated steel rails can also be supplied with welded on steel studs (state dimension a and required studs). I 1 TS 32 I 2 I 1 Y 32 mm G I 2 a TS 35 M 5x8 M 6x12 Stud TS 35 a TS 32 W M 5x8 35 mm M 6x12 Stud a TS 15 M 5x6 Stud V 35 mm G.25 35 35 h h 5,5 mm 5,5 mm 7,5 mm 15 mm Accessories