Gemmo Quadri

Medium voltage metal clad SwitchboardSeries Euroclad GM-BThe medium voltage distribution metal clad switchboard, service category LSC2B, with modular cubiclescan be equipped with breaker execution switches, for the following breakdown techniques:• Sulphur hexafluoride• Vacuum packedThe breaker switch positions inside the compartment may be:• Connected position: main and auxiliary circuits connected.• Isolated position: main circuits disconnected; auxiliary circuits (Test) connected orauxiliary circuits (totally isolated) disconnected.• Withdrawn position: main circuits and auxiliary circuits disconnected. Circuits breaker racked out ofthe cubicle.TECHNICAL SPECIFICATIONSTensione nominale Rated voltage KV 12 17,5 24 36Tensione di servizio Service voltage KV 3+10 10+15 15+23 27+30Frequenza nominale Rated frequency Hz 50/60 50/60 50/60 50/60Tensione di prova 1 min.-50 Hz Test voltage 1 min.-50 Hz KV 28 38 50 70Tensione di tenuta ad impulso Impulse withstand voltage KV 75 95 125 170Corrente nominale delle sbarreprincipali - fino a (1)Corrente ammissibile di brevedurata - fino a (2)Rated main busbarcurrent up to (1)Short-time withstandcurrent up to (2)A 4000 3000 3000 2000KA/ls 50 40 31.5 31.5Corrente di cresta -fino a Peak withstand current up to Kéi. 125 100 75 75Metal structureThe cubicle’s self-supporting structure is made up of standardized elements of medium moulding steel sheetwith minimum thickness of 25/10 mm.All structure elements, provided with modular holes, are assembled together by angle junctions in welded plate,electrical points and special screws that ensure strength and electrical continuity.Side and rear curtain wall panels, front and rear doors, cubicle baffles, segregations and supports for thedifferent components are fitted on the structure.The minimum thickness of steel sheet for those elements is 20/10mm. Internal fittings, component supportingpanels, all parts subject to rubbing, bolts, nuts and screws are galvanized and passivated.22