System and method for providing alternate AC voltage
First Claim
1. A system for use with primary and secondary electrical loads having a main AC voltage source, the system providing an alternate AC voltage source to the primary electrical load in the event of a failure of the main AC voltage source, the system comprising:
- means for selecting a delay time period based on the secondary electrical load;
means for generating a main AC voltage signal representing the voltage of the main AC voltage source;
means for processing the main AC voltage signal to determine a status of the main AC voltage, a main AC voltage failure time period, and a main AC voltage restoration time period;
means for generating a control signal in response to the main AC voltage status, the main AC voltage failure time period, the main AC voltage restoration time period, and the delay time period selected; and
means for switching the primary electrical load between the main AC voltage source and the alternate AC voltage source in response to the control signal such that the alternate AC voltage source is conserved.
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Accused Products
Abstract
A system and method for providing an alternate AC voltage to an electrical load having a main AC voltage. The system and method include a signal generator for generating a main AC voltage signal representing the value of the main AC voltage, and a processor for processing the main AC voltage signal to determine a status of the main AC voltage, a main AC voltage failure time period, and a main AC voltage restoration time period. The system and method also include a control signal generator for generating a control signal in response to the main AC voltage signal, the main AC voltage failure time period, the main AC voltage restoration time period, and a pre-selected delay time period, and a switch for switching the electrical load between the main AC voltage and the alternate AC voltage in response to the control signal.
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Citations
22 Claims
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1. A system for use with primary and secondary electrical loads having a main AC voltage source, the system providing an alternate AC voltage source to the primary electrical load in the event of a failure of the main AC voltage source, the system comprising:
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means for selecting a delay time period based on the secondary electrical load; means for generating a main AC voltage signal representing the voltage of the main AC voltage source; means for processing the main AC voltage signal to determine a status of the main AC voltage, a main AC voltage failure time period, and a main AC voltage restoration time period; means for generating a control signal in response to the main AC voltage status, the main AC voltage failure time period, the main AC voltage restoration time period, and the delay time period selected; and means for switching the primary electrical load between the main AC voltage source and the alternate AC voltage source in response to the control signal such that the alternate AC voltage source is conserved. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for use with primary and secondary electrical loads having a main AC voltage source, the system providing an alternate AC voltage source to the primary electrical load in the event of a failure of the main AC voltage source, the system comprising:
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means for selecting a delay time period based on the secondary electrical load; a signal generator for generating a main AC voltage signal representing the voltage of the main AC voltage source; a processor for processing the main AC voltage signal to determine a status of the main AC voltage, a main AC voltage failure time period, and a main AC voltage restoration time period; a control signal generator for generating a control signal in response to the main AC voltage status, the main AC voltage failure time period, the main AC voltage restoration time period, and the delay time period selected; and a controller for switching the primary electrical load between the main AC voltage source and the alternate AC voltage source in response to the control signal such that the alternate AC voltage source is conserved.
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11. A method for use with primary and secondary electrical loads having a main AC voltage source, the system providing an alternate AC voltage source to the primary electrical load in the event of a failure of the main AC voltage source, the method comprising:
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selecting a delay time period based on the secondary electrical load; generating a main AC voltage signal representing the voltage of the main AC voltage source; processing the main AC voltage signal to determine a status of the main AC voltage, a main AC voltage failure time period, and a main AC voltage restoration time period; generating a control signal in response to the main AC voltage status, the main AC voltage failure time period, the main AC voltage restoration time period, and the delay time period selected; and switching the primary electrical load between the main AC voltage source and the alternate AC voltage source in response to the control signal such that the alternate AC voltage source is conserved. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A system for use with primary and secondary electrical loads having a main AC voltage source, the system providing an alternate AC voltage source to the primary electrical load in the event of a failure of the main AC voltage source, the system comprising:
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means for selecting a delay time period based on the secondary electrical load; a signal generator for generating a main AC voltage signal representing the voltage of the main AC voltage source; a processor for processing the main AC voltage signal to determine a failure of the main AC voltage, a main AC voltage failure time period, a restoration of the main AC voltage, and a main AC voltage restoration time period; and a controller for a) isolating the secondary electrical load and switching the primary electrical load from the main AC voltage source to the alternate AC voltage source at a failure of the main AC voltage source, and b) connecting the secondary electrical load to the main AC voltage and switching the primary electrical load from the alternate AC voltage source to the main AC voltage source after restoration of the main AC voltage based on the delay time period selected, the failure time period, and the restoration time period so that the alternate AC voltage source is conserved.
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22. A method for use with primary and secondary electrical loads having a main AC voltage source, the method providing an alternate AC voltage source to the primary electrical load in the event of a failure of the main AC voltage source, the method comprising:
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selecting a delay time period based on the secondary electrical load; generating a main AC voltage signal representing the voltage of the main AC voltage source; processing the main AC voltage signal to determine a failure of the main AC voltage, a main AC voltage failure time period, a restoration of the main AC voltage, and a main AC voltage restoration time period; isolating the secondary electrical load and switching the primary electrical load from the main AC voltage source to the alternate AC voltage source at a failure of the main AC voltage source; and connecting the secondary electrical load to the main AC voltage and switching the primary electrical load from the alternate AC voltage source to the main AC voltage source after a restoration of the main AC voltage based on the delay time period selected, the failure time period, and the restoration time period so that the alternate AC voltage source is conserved.
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Specification