Shore power transfer switch
First Claim
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1. An apparatus, comprising:
- a power switch device to selectively provide AC electric power on the power distribution bus from one of a local power source and an external power interface, including;
a first normally open contactor between the external power interface and the power distribution bus, a first switch, and a first contactor state control;
a second normally open contactor between an inverter and the power distribution bus, a second switch, and a second contactor state control;
an external power control circuit through the first switch and the first contactor state control, the external power control circuit having a default closed state when external power is available at the external power interface, the default closed state of the external power circuit providing electricity from the external power interface to the first contactor state control to close the first normally open contactor and correspondingly route the AC electric power to a power distribution bus from the external power interface; and
a local power control circuit through the second switch and the second contactor state control, the local power control circuit having a default open state when the external power circuit is in the default closed state.
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Abstract
A vehicle includes a mobile electric power generation system including a mobile power source such as a generator. An external power interface is included to connect to an external electrical power source. An AC electric power distribution bus is included to power electric loads of the vehicle and a power switch device is provided to selectively provide AC electric power on the power distribution bus from one of the respective power sources with a default to select one of the sources whenever it is present.
69 Citations
7 Claims
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1. An apparatus, comprising:
- a power switch device to selectively provide AC electric power on the power distribution bus from one of a local power source and an external power interface, including;
a first normally open contactor between the external power interface and the power distribution bus, a first switch, and a first contactor state control; a second normally open contactor between an inverter and the power distribution bus, a second switch, and a second contactor state control; an external power control circuit through the first switch and the first contactor state control, the external power control circuit having a default closed state when external power is available at the external power interface, the default closed state of the external power circuit providing electricity from the external power interface to the first contactor state control to close the first normally open contactor and correspondingly route the AC electric power to a power distribution bus from the external power interface; and a local power control circuit through the second switch and the second contactor state control, the local power control circuit having a default open state when the external power circuit is in the default closed state. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- a power switch device to selectively provide AC electric power on the power distribution bus from one of a local power source and an external power interface, including;
Specification