Two-stage, wide range power supply for a network protector control relay

A power supply for a control relay includes first and second voltage regulators having first and second operating ranges, respectively, and a switching mechanism. A rectified DC source voltage is provided to the first voltage regulator and the first voltage regulator converts it into a first DC volt...

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Bibliographische Detailangaben
Hauptverfasser:	ENGEL JOSEPH C, KENNY THOMAS J
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	A power supply for a control relay includes first and second voltage regulators having first and second operating ranges, respectively, and a switching mechanism. A rectified DC source voltage is provided to the first voltage regulator and the first voltage regulator converts it into a first DC voltage. The rectified DC source voltage is also provided to the switching mechanism which provides it to the second voltage regulator only when the switching mechanism is in a second condition. When the second voltage regulator receives the rectified DC source voltage, it converts it into a second DC voltage. The switching mechanism is adapted to be in a first condition when the rectified DC source voltage is greater than an upper threshold of the second operating range and in the second condition when the rectified DC source voltage is less than that upper threshold. At least one of the DC voltages is provided to the control relay.