| 摘要 |
In a group switchboard with miniature circuit breakers by means of an earthing device 13 according to this invention it is possible to carry out earthing and short- circuiting of a group lead in order to carry out work on this. The switchboard is equipped with a metal casing 9 which via a support 1 is in electrical contact with the protective lead connection 8 of the switchboard. The earthing device is equipped with a device 16 for fastening the device to the casing 9 and devices 16, 17 for establishing electrical contact between the casing 9 and the output terminal 5 of the group lead's miniature circuit breaker 3. The earthing device covers the front of the miniature circuit breaker and prevents operation of this. <IMAGE> |
