| 摘要 |
<p>The invention relates to a circuit breaker (100) for protecting an electrical system (10). The circuit breaker comprises a semiconductor switching element (T1) with a first (1) and a second (2) electrical terminal connected to a mains supply line (LIN) and a control terminal (3). Such switching element (T1) is controlled by enabling/disabling a control signal (S) applied to the control terminal (3) for switching between an open/closed status and a closed/open status for connecting/disconnecting at least one load (LD) to/from the supply line (LIN). Moreover, the circuit breaker comprises a drive (DV) adapted to enable/disable the control signal (S). The circuit breaker (100) is characterised in that it comprises:
- a current limiting circuit (200) operatively associated with the mains supply line (LIN) configured for sending a first signal (S1) to the drive (DV) for disabling the control signal (S) switching the switching element (T1) from the closed status to the open status subsequent to the detection of a current value (Icc) indicative of a failure in the system;
- a voltage regulator circuit (300, 400) connected to the first (1) and to the second (2) electrical terminal, comprising:
dissipation means (300) of an electrical energy stored on the mains supply line (LIN) subsequent to the switching of the switching element (T1) from the closed status to the open status,
means (400) for limiting a failure voltage between the first (1) and the second (2) terminal generated by peak values of the failure current (Icc).
Moreover, the circuit breaker comprises an overheating safety circuit of said first (1) and second (2) electrical terminal caused by a non conforming clamping of the electrical wires connected to such terminals.</p> |
