| 摘要 |
<p>A terminal operator protective circuit of a DC power supply system, provided with a shunt release in a DC breaker (K); the status of the shunt release is controlled by the contact extent of a power supply contactor inside a lower-level electric power connector; when the electric power connector in a powered state is broken by an external force or disconnected by a terminal operator by mistake, the shunt release acts firstly before the power supply contactor inside the electric power connector is disconnected, and an upper-level DC breaker actively initiates tripping, such that the power supply contactor inside the lower-level electric power connector completes disconnection under zero voltage and zero current, thus generating no dangerous DC electric arc.</p> |
