| 摘要 |
A locking device for unipolar breaker is remote-controlled: the device surrounds a breaker blade and adds to a pivoting-base of the blade a T-shaped piece which prevents the closing of the blade. The T-shaped piece comprises a wide web and two wedge points. The wide web is of a reversed U-shape comprising wings that are locked together by a latch placed inside one of the wings and operated by a key. The latch cannot be triggered too easily so it will not start by itself. To trigger the latch, a key has to be inserted into a casing located in a wing. This casing holds a disk with scarf-joints while the key has a disk with grooves, the combination of scarf-joints and grooves allowing various combinations. The key is located at the end of a gaff, so that only one user may lock or unlock the switch.
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