Apparatus for controlling interconnect switch

An apparatus for controlling an interconnect switch connecting a power source to a load;

• comprising:
• an interconnect switch control circuit connected to the interconnect switch for closing the interconnect switch upon an application of voltage from the power source;
• a voltage storage circuit for storing a voltage related to a nominal operating voltage of the power source;
• a voltage sensing circuit for sensing a voltage related to the instantaneous voltage of the power source;
• a comparator connected to said voltage storage circuit and said voltage sensing circuit for comparing said instantaneous voltage relative to said nominal operating voltage;
• and
• a timing circuit connected to said comparator and said interconnect switch control circuit for opening said interconnect switch for a selected period of time after a reduction of the instantaneous voltage relative to the nominal operating voltage of the power source.

A circuit for controlling opening an interconnect switch connecting a power source and a load upon a reduction of voltage of the power source;

• comprising:
• a rectifier circuit connected to the power source for providing a rectifier voltage related to the voltage of said power source;
• a voltage storage circuit connected to said rectifier circuit for storing a voltage related to a nominal operating voltage of the power source;
• a voltage sensing circuit connected to said rectifier circuit for sensing a voltage related to an instantaneous voltage the power source;
• a comparator circuit connected to said a voltage storage circuit and said voltage sensing circuit for comparing said instantaneous voltage relative to said nominal operating voltage;
• a timing circuit connected to said comparator circuit for providing a delayed output for a selected period of time upon said comparator circuit sensing reduction of the said instantaneous voltage relative to said nominal operating voltage;
• and
• an interconnect switch control circuit connecting to said timing circuit and said interconnect switch for opening the interconnect switch for said selected period of time upon said comparator circuit sensing reduction of instantaneous voltage.

A circuit for controlling opening an interconnect switch connecting an AC power source and a load upon a reduction of voltage of the AC power source;

• comprising:
• a rectifier circuit connected to the AC power source for providing a rectified voltage related to the voltage of said AC power source;
• a voltage storage circuit comprising a capacitor and a zener diode connected to said rectifier circuit for storing a DC voltage related to a nominal operating voltage of the AC power source;
• a voltage sensing circuit connected to said rectifier circuit for sensing a rectified voltage related to the instantaneous voltage of the AC power source;
• a comparator circuit connected to said a voltage storage circuit and said voltage sensing circuit for comparing said instantaneous voltage relative to said nominal operating voltage for sensing a reduction of in the instantaneous voltage of the AC power source;
• a timing circuit connected to said comparator circuit for providing a delayed output for a selected period of time upon said comparator circuit sensing reduction of the said instantaneous voltage relative to said nominal operating voltage;
• and
• an interconnect switch control circuit connecting to said timing circuit and said interconnect switch for opening the interconnect switch for said selected period of time upon said comparator circuit sensing reduction of instantaneous voltage.