| 摘要 |
A solid state circuit breaker for disrupting the flow of direct current. A power transistor is used in series with the direct current. The power transistor disrupts the direct current only when it is in an off state. A first optoisolator and a second optoisolator are provided. The second optoisolator selectively alters the power transistor to its off state. The first optoisolator selectively controls the second optoisolator. A threshold resistor is provided through which the direct current passes. The threshold resistor creates a voltage differential. The voltage differential is supplied to the first optoisolator and activates the first optoisolator if the voltage differential is greater than a selected threshold voltage.
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