8 MB - POWERLAB

Functionsand characteristicsSource-changeover systems 0Mechanical interlockingPB100826-56Electrical interlocking of two or threedevices is used to create a remote-operatedsource-changeover system.A basic mechanical interlocking systemenhances the reliability of system operation.Interlocking of two devices using cables.Interlocking of two devices using cablesTo ensure a continuous supply of power, certain electrical installations are connectedto two power sources:b a normal source Nb a replacement source R which supplies the installation when source N is notavailable.A source-changeover system switches between the two sources. The system mayinclude an automatic controller which manages switching according to externalconditions. A source-changeover system may comprise two or three circuit breakersor switch-disconnectors.Interlocking of two devices using connecting rodsThe two devices must be stack mounted.This function requires:b an adaptation fixture on the right side of each deviceb a set of connecting rods with no-slip adjustments.The complete interlock kit is supplied for assembly by the customer.Maximum vertical distance between the fixing planes: 900 mm.Combinations of Masterpact Normal and Replacement source devicesDevices to be interlocked NT NWFixed Drawout Fixed DrawoutNT Fixed b - - -Drawout - b - -NW Fixed - - b bDrawout - - b bInterlocking of two or three devices using cablesUsing cables, the devices may be stack mounted or installed side-by-side.Interlocking of two devices (Masterpact NT or NW)This function requires:b an adaptation fixture on the right side of each deviceb a set of cables with no-slip adjustments.Maximum distance between the fixing planes (vertical or horizontal): 2000 mm witha radius greater or equal to 100 mm.For cases requiring greater distances between fixing planes, please consult us.Interlocking of three devices (only Masterpact NW)This function requires:b an adaptation fixture (different for each type of interlocking) on the right side ofeach deviceb two or three sets of cables with no-slip adjustments.Maximum distance between the fixing planes (vertical or horizontal): 1000 mm witha radius greater or equal to 100 mm.For cases requiring greater distances between fixing planes, please consult us.InstallationThe complete interlock kit is supplied for assembly by the customer.Combinations of Masterpact Normal and Replacement source devicesAll combinations of Masterpact NT and NW devices may be used together in asource-changeover system. Interlocked devices may be fixed or drawout, three orfour pole, with different ratings and sizes.54