Ducted current supply bus=bar unit - ensures building-in of switches inserted through cut=outs of bus=bars near threaded holes of earth conductor

摘要

The earthed unit of current feeding busbar unit allows for connection in the channel without the risk of a mismatch when unqualified personnel are handling the installation. The contact busbar-pair (5) has an undercut (221) in the zone of the threaded hole (215) of the earthing bar (7). The adjacent ends of busbars (5) have a slot (136') for inserting the terminals of built-in type switches. Earthing clips (213) of the bar (7) provide an additional groove profile for inserting the earthing plug pins. The channel-shaped insulator (101) has a sufficient size for standard earthed contact units and the switch housing is secured by a cover frame with the interposition of the lid.