Planning with SIVACON 8 PS - Siemens

Planning with LDA/LDC4.2 System components4.2.11.2 Arc fault resistant tap-off units with fuse switch disconnectorRated currentsTwo tap-off units for 400 A and 630 A are available for selection for use with NH fuses.Operator controlThe NH fuse links are switched on and off via the door-coupling operating mechanism.Degree of protectionThe standard degree of protection is IP54. In this design, the tap-off unit is supplied with adoor.Figure 4-10Degree of protection IP54Cable compartment/cable entryA bolted connection is used for cables with cross sections up to 2 x 4 x 240 mm 2 . Cables canbe fed in on both sides. In the case of a single-core cable entry, an aluminium plate fittedwith metric screwed joints is included in the scope of supply.Resistance to arc faultsThe tap-off units are resistant to arc faults. This has been verified by means of accidental arctesting to IEC 439-1 Supplement 2, EN 60439-1 Supplement 2, VDE 0660 Part 500Supplement 2 and confirmed by a test report.Type designationThe type designation for tap-off units with NH switch disconnectors is LD-.AK./FS.Planning with SIVACON 8 PSPlanning Manual, 10/2007, A5E01541101-01 123