| 摘要 |
<p>The present invention relates to a device used to detect a difference between currents in an electric circuit, designed as an electrical four-terminal network included in a DC or AC electric circuit, comprising a movable magnetic yoke (3) and a magnetic core (2). The magnetic core (2) consists of the first lateral leg (6) of the core and the second lateral leg (6') of the core and is equipped with a permanent magnet (9) situated symmetrically between the legs (6, 6') of the core. The first winding (4) and the second winding (4') are installed on the legs of the core respectively. The device is characterised in that the permanent magnet (9) is a component of the middle leg (7) of the core with its longitudinal axis (A) being the axis of symmetry of the core which is identical with the axis of the permanent magnet defined by its NS magnetic poles (9), where the magnetic yoke (3) is designed to rotate in a plane parallel to the longitudinal cross-section of both legs (6, 6').</p> |
