Patent ID: 7133272
Filing Date: 2006-11-07
Classification: H02J,H03K

Abstract:
1. A locomotive relay assembly comprising: a plurality of solid-state relay devices, each of said solid state relay devices having a switch, and a signal regulated by a D.C./D.C. power converter, wherein said D.C./D.C. power converter regulates standard locomotive voltage by stepping down said locomotive voltage to a solid-state relay control side voltage; wherein the opening of said internally self-biased solid-state relay device causes said externally self-biased solid-state relay device to be no longer self-biased, thus opening said externally self-biased solid-state relay device; wherein each said switch comprises a solid-state relay load side, and each said switch comprises a solid-state relay control side opposite said solid-state relay load side; wherein said solid-state relay load side, in the presence of said standard locomotive voltage, has a combined normally open switch configuration and a normally closed switch configuration, said normally closed switch configuration comprising an internally self-biased solid-state relay device and an externally self-biased solid-state relay device, wherein said externally self-biased solid-state relay device is self-biased due to electricity running from said load side to said control side through a first D.C./D.C. power converter that runs in parallel with said externally self-biased solid-state relay device; wherein said solid-state relay control side, in the presence of the electricity passing through a second D.C./D.C. power converter at said standard locomotive voltage, causes said normally open configuration to close, and causes said normally closed configuration to open, wherein the opening of said internally self-biased solid-state relay device causes said externally self-biased solid-state relay device to be no longer self-biased, thus opening said externally self-biased solid-state relay device.