| 摘要 |
The circuit has a triac (Q1) comprising a main terminal connected to an alternating current voltage source (V1) by a load (R4) to be protected and another main terminal connected to a trigger of another traic (Q2) and to an error threshold adjustment resistor (R10). A trigger of the former traic is connected to a direct current voltage source. The latter traic comprises main terminals connected to the direct current voltage source and a ground of the circuit. The trigger of the latter traic is connected between the latter main terminal of the former triac and the resistor. |
