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POWERAILS VKS & VKL

1912 VAHLEPowerails VKS and VKL are space saving conductorsystems, designed to prevent any accidental contact and hazard to personnel and are test finger proof to regulations VDE 0470, part 1 (EN 60529), protection code IP21. Collectors are proof against accidental touch only when fullyentered into powerail.Powerail installations within reach of hand require a special pro-tection on the part of operator against accidental touch of current collectors which are leaving the powerail (e.g. locking or cut-off the power). This is applicable for voltages above 25 V AC respectively 60 V DC.The different plastic housings hold from 3 to 6 copper or stainlesssteel conductors.Multiple conductor systems can be easily desi-gned by combining several plastic housings.The minimal space required allows the systems to be integratedin the crane or hoist track or in other special runway profiles.The VKS& VKLPowerail can be used for indoor and roof-over(rain protected)applications. They can be installed with lateral orsuspended mounting and straight or curved tracks are available. Standard Support Brackets

VKS Powerail Systems

Support brackets for easy installation are available, (see page21, 22). are designed for safe mobile power feeding of:Hoists, Monorail Systems, Stacker Cranes, Machine Tools, Pro-duction and Testing Lines, also for Sliding Switches, Turntables,Hoisting Stations, Transfers, and many other Applications, incl. Data and Signal Transmission. Collectors The collectors have a continuous rating of 6 Aup to 120 A. Onecollector is required for each phase and earth conductor. The ground collectors have a yellow colour and different attachmentsto avoid interchangeability with phase collectors.The collectors have spring loaded carbon brushes for a constantpositive contact with the conductors.Collectors are to be mounted onto towing plates or are to beattached to the moving equipment by means of towing bracketstype UM. Systems with transfers, switches, turntables, etc. requi- re 2 single collectors or one double collector per conductor. Housing The well insulating plastic housing holds 3-6 conductors. 4 mstandard lengths and shorter sections to coincide with your run-way requirements are available. The asymmetrical housingavoids phase reversing. The ground conductor is identified bythe international yellow colour coding. Conductor Dead Sections Joints Conductor dead sections can be mounted at any position of thesystem. The plastic inserts are pushed into the copper profiles and ensure a smooth transfer of the collector brushes.The length of isolating section has to consider the total length ofcarbon brush and whether carbon brush must The plastic sections are connected with plastic joint caps, theconductors with spring-loaded copper connectors. Feed Sets End feeds or line feeds with terminal boxes are available, alsolow mounting line feeds for cable connection. Line feeds comefactory assembled on 1 m long Powerail sections. End feedscome unassembled without any Powerail section. Hangers All sections are to be suspended from at least 2 hangers and themaximum permissible support centres of 1 m (with doublecollectors 0.8 m) must be adhered to. The hangers are equippedwith M 6 bolts & hardware and can be mounted directly to han- ger brackets, monorail tracks or special runway profiles. The Powerail sections are snapped into the hangers. Slidinghangers allow free movement of the Powerail to compensate for temperature variations. Fixpoint hangers with tapping screw fromanchor points (see installation procedure). or must not bridgethe isolating area.Special attention is required for double collectors or collectorsswitched in parallel. Use double isolating sections where neces-sary. Selection of conductors VKS…/ 60 copper conductor for power and control system and data transmission in accordance to ampere load and environmental conditions: …/100 copper conductor for power and control system …/120 copper conductor for power and control system …/140 copper conductor for power and control systemSeveral combinations of cross sections are possible for one conductor type.

Consider the voltage drop calculation to maintain the limits established by the motor manufacturers:

Formulas:Effective length: AC:

?? u =?? 3 x I x l x Z

l = L power feed located at the end of the system l = L / 2 power feed located at the mid-point of the system

DC:

?? u = 2 l x I x R

l = L / 4 power feed located at both ends of the system ?? u = Voltage drop[V] R = Resistance[Ohm/m] l = L / 6 power feed located at L / 6 from each end of the system l = Ampere load[A] l = Power feed length[m] Z = Impedance [Ohm/m] L = System length[m] The total ampere load is determined from the nominal rated current of all motors working simultaneously on the same feed section of your electrification system.

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