| 摘要 |
<p>A magnetically pressed leak cover device comprising a housing and magnets mounted therein, characterized in that a magnet set formed by an upper magnet and a lower magnet is provided in the housing, at least one of said upper and lower magnets is rotatable in the housing, and an operational magnetic field is generated by rotating the N pole and S pole of the magnets and changing the positions thereof, arranged between the upper and lower magnets is a magnetically insulating plate, the upper magnet is secured at the upper side of the magnetically insulating plate and the lower magnet is secured at its lower side, below the leak cover device is a magnetically conductive shoe, at a position on said shoe corresponding to the lower magnet is provided a magnetically insulating plate, the rest portion of the shoe is provided a magnetically conductive plate. The present invention can be used in a simple and reliable manner, and no additional facilities are required, the device is an ideal cover device for the medium and low voltage assemblies.</p> |
