| 摘要 |
<p>The invention relates to an automatic breaker for protecting both domestic and industrial installations against flask currents, overload currents, fault currents and over voltages in the supply network. According to the invention, the automatic breaker for a multiple protection of the electrical installations has mainly a button (5) with two positions (a) which switches on the mobile contact (6) by a locking device (7 and b) which the switches them off by means of the same locking device (8). The unlocking device (8) is driven simultaneously or independently by three tripping devices an namely : an overload tripping device (9), of a heat-type, a short current tripping device (10), of electromagnetic type, a fault and over voltage tripping device (11). The tripping device (11) has a coil supplied by an electric unit (12) when, in the terminals (c and d) it received through the winding (e) of a transducer (13), a voltage proportional with a fault current occurred in the installation to be used (A), or when in the terminals (f and g) there occurred a voltage greater than the nominal voltage of the installation to be used (A).</p> |
