switchgear for electrical switches and umpolschalter, mehrpoliger such switchgear

摘要

When the live conductors are engaged, the locking finger (33) is butted against a first face projecting from the top of the slider (30) to prevent the disengagement of the cut-off mechanism (18) of the neutral pass (17) via a mobile conducting plate (20). When the cut-off mechanism is disengaged, the finger is butted against a second surface on the side of the slider to prevent engagement of the live conductors. A return spring (22) between the casing (1) and the control block (3) holds the conducting plate against the contacts (19). The push-button (21) has a slotted head (24) to allow the insertion of a tool to manoeuvre it from one stable position to the other.