Automatic transfer switch
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United States of America Patent
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Apr 3, 2018
Issued Date -
N/A
app pub date -
Jun 24, 2016
filing date -
Jun 24, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
Automatic transfer switch for switching an electrical load between two power sources. In one example, the automatic transfer switch includes four latching relays and an electronic controller. A first power source line connection is connected to an electrical load line connection via a first latching relay. A first power source neutral connection is connected to an electrical load neutral connection via a second latching relay. A second power source line connection is connected to the electrical load line connection via a third latching relay. A second power source neutral connection is connected to the electrical load neutral connection via a fourth latching relay. The electronic controller connects the second power source to the electrical load when a voltage of the first power source is less than a first threshold, and connects the first power source to the electrical load when the voltage is greater than a second threshold.
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