| 摘要 |
Known contact connections of auxiliary circuits on push-in units are constructed in the same way as the main circuits as self-coupling separable contact connections. This is dependent on the contact connection being made in an absolutely operationally reliable manner. The new contact connection is intended to ensure correct and problem-free adjustment of the individual contact parts with respect to one another. A plug housing (2) which has a plurality of plug pins (3) is mounted on the extendible push-in unit (1). A socket strip (5) which corresponds to the plug housing (2) is mounted on the push-in rack (4). The socket strip (5) has one or more projections (13), which engage in the plug housing (2), and in each case two mutually electrically insulated contact sockets (6 and 7 respectively), which are arranged located one behind the other in the axial direction of the plug pins (3), associated with each of the plug pins (3). The contact sockets (7), which are arranged pointing towards the push-in rack (4), have connections (8) for wiring to the stationary part of the switching installation. The electrical connection of the auxiliary circuits is produced by moving the contact plug (11) into the sockets (6) and (7). A contact arrangement for the connection of auxiliary circuits, especially control circuits, of extendible push-in units, especially power switches (power circuit breakers), to the stationary part of electrical switching installations. <IMAGE>
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