FIELD: electrical engineering. SUBSTANCE: device has line converter and set of stand-by power supplies connected through isolating diodes to no-break power supply buses. Energy storage capacitor and isolating diodes ensure desired power characteristics on no-break power board during switching processes in load and in power supplies. Device also has make and break contacts , and charging resistor. EFFECT: improved reliability and power characteristics, reduced size and mass of device. 1 dwg
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