| 摘要 |
PROBLEM TO BE SOLVED: To provide a relay module capable of turning two main switches on by electrifying one electromagnetic coil, while enhancing fail-safe properties of a drive transistor connected with the electromagnetic coil.SOLUTION: A relay system includes a pair of power lines 8p, 8n, main switches 2a, 2b, a capacitor 3, a series body 12, two main switches 2a, 2b and a control circuit 5 for controlling on/off operation of a precharge switch 2c. The relay system is configured so that the two main switches 2a, 2b can be turned on by a magnetic force generated by electrifying one holding electromagnetic coil 6b. A holding transistor 7b is connected in series with the holding electromagnetic coil 6b. A spare transistor 7d is connected in series with the holding transistor 7b. |
