| 摘要 |
A mechano-electronic type DC switch includes positive and negative input joints (1,2), positive and negative output joints (3,4), a DC unit (5), a microprocessor control unit ( MCU ) (6) and a key switch unit (7). The DC unit (5), the MCU (6) and the key switch unit (7) are connected in sequence. The DC unit (5) is connected with the positive and negative input joints (1,2) and the negative output joint (4). The mechano-electronic type DC switch also includes a main switch unit (8) and an isolation arc extinction unit (9). The main switch unit (8) is parallelly connected with the isolation arc extinction unit (9). The input terminal of the main switch unit (8) is connected with the positive input joint (1) and the DC unit (5) respectively, and the output terminal thereof is connected with the positive output joint (3). The MCU (6) is also connected with the main switch unit (8) and the isolation arc extinction unit (9), and controls the on and off of the main switch unit (8) and the isolation arc extinction unit (9) by detecting the state of the key switch unit (7). The isolation arc extinction unit (9) can eliminate electric arc, make the positive input joint (1) and the positive output joint (3) isolated physically at the same time, and greatly prolong the service life of the mechano-electronic type DC switch. |
