Planning with SIVACON 8 PS - Siemens

Planning with LXA/LXC5.2 System components5.2.11 Tap-off unitsCharacteristics of tap-off unitsFor a comprehensive power distribution structure, tap-off units are available in four sizes:● For 80 to 250 A● For 400 A● For 630 A● For 800 to 1250 AThe rated operating voltage (Ue) is 400 V. Regardless of mounting position, the enclosureensures IP54 degree of protection (IP55 can be achieved with the appropriate accessories).All units are fitted with either a fuse switch disconnector or circuit-breaker with handle as wellas bolts for the cable connection. For conductor systems (conductor configurationsaccording to type LX...6.) with insulated PE conductor, the tap-off units are supplied with theaddition of a separate PE connection.Cable entryCable entry can be from the side or front (exception: for tap-off units up to 250 A from thefront only). Integrated flange with cable sleeves facilitates multi-core cable entry. Aluminiumplates are used for single-core cable entry; these have to be fitted with cable glands locally.Safety during operationThe tap-off units cannot be opened unless the protective device is switched off manually.Once this is done, the cable connection area is no longer energized. The part of the contactdevice in the front of the tap-off unit is "finger-proof".Implementing the tap-offsTap-offs are required for different amperages depending on the sizeand type of consumersinvolved. These are implemented by means of plug-in tap-off units from 80 to 630 A orbolt-on tap-off unitsfrom 800 to 1250 A.Planning with SIVACON 8 PS162 Planning Manual, 10/2007, A5E01541101-01