Prisma Plus G - Schneider Electric

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Additional information<strong>Electric</strong>al characteristicsDesigning the PEN conductorPower circuitSize of PEN protective conductorPractical guidelinesThe size of the PEN is determined in the same manner as a neutral conductor, i.e.:bbfor copper single-phase circuits or sized y 16mm², it must be the same size asthe phase conductorsbbfor copper three-phase circuits sized > 16 mm², it can be:vvthe same size as the phase conductorsvvsmaller on the condition that:--the current likely to flow in the neutral during normal operation is less than thepermissible current for the conductor--the power rating of single-phase loads does not exceed 10 % of the total rating.The conductor must be accessible to enable connections both in the factory andon site, as well as checks on the tightness of connections.Implementing the PEN protective conductorPractical guidelinesAccording to standard IEC 61439-1 and 2, the practical guidelines for implementingthe PEN are the following:bbat the entry to the assembly, the PEN connection must be next to the phaseconnectionsbbwithin the assembly, the PEN does not need to be insulated from the exposedconductive parts (except on sites where there is a risk of fire or explosion)bbthe size of the conductor must be at least equal to that of the neutralbbthe size must remain constant throughout the main busbarsbbthe change from a TNC to a TNS system must take place at a single point in theswitchboard, via a marked neutral-disconnection bar that is accessible and can bedismantled to facilitate the impedance measurement of the fault loopbbafter the TNS creation point, it is forbidden to recreate a TNC system.The PE and the neutral must meet their specific requirements.144
Additional informationPractical informationConnection of power cablesbbTo ensure protection of persons, first connect the switchboard protectiveconductor to the earth electrode.bbTie the cables as close as possible to the connections to avoid any mechanicalstresses on the device terminals. When not using cable glands, also attach thecables near to the cubicle entry point.bbCables must never be in contact with or passed between live conductors.bbSharp edges of the framework must be protected where cables pass to avoiddamaging the conductors.bbComply with a minimum radius of curvature of 6 to 8 times the cable outsidediameter.bbAll power connections must be made with class 8.8 mounting hardware andelastic contact washers, tightened to the torque indicated in the table below.bbWhen connecting aluminium cables to copper terminals, use bimetal lugs orinterfaces.bbSeparate the different types of circuits into separate cable bundles (power, control,48 V, 24 V, DC, AC, etc).Cable bundlesCable cross-sectional area Max. number of cables per bundle(mm² )CSA y 10 816 < CSA y 50 4CSA u 50Tie individuallyTying the cable bundlesType of tieWidth: 4.5 mmLoad: 22 kgWidth: 9 mmLoad: 80 kgMaximum Icw(kA/rms 1s)10152020253545For cable sizes of 50 mm² or more, use 9 mm wide fixing ties.Distance between ties(mm)2001005035020010070Recommended tightening torque for mechanical and electrical connections with8.8 class screws.Diameter of screwTightening torque (Nm)(with nut + contact washer)M3 1.5M4 3.5M5 7M6 13M8 28M10 50M12 75145
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Prisma Plus GIndexp. 2Determining c
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IndexAlphabetical indexDesignationP
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IndexCatalogue number indexCat. no.
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Prisma Plus:the optimised, tested a
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P System3200 A630 A> Hospitals> Bot
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upgradeable LV switchboards…optim
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Original Manufacturer and Assembly
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IEC 61 439-1 paragraph 11.4Protecti
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PresentationExamples of switchboard
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PresentationExamples of switchboard
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PresentationDetermining catalogue n
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PresentationDetermining catalogue n
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Functional systemContentsPresentati
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Functional systemPresentationThe Pr
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Functional systemFunctional unitsan
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OFFOI ONIONFunctional systemFunctio
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00604010060401000604010006040100Fun
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1004060Functional systemFunctional
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Functional systemAccessoriesFront p
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Functional systemAccessoriesFixing
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Functional systemAccessoriesCable r
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Functional systemAccessoriesSwitchb
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Functional systemAccessoriesManagem
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Functional systemDistributionPanora
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Functional systemDistributionNon-Ce
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Functional systemDistributionCentra
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Prisma Plus Genclosures
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Prisma Plus G enclosuresIP30, IP31,
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Prisma Plus G - Schneider Electric

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