| 摘要 |
FIELD: electric power supply engineering. ^ SUBSTANCE: proposed power turn-on and turn-of device has secondary power supply, code keying unit, control unit, actuating device with make contact, push-button with make contact, indicator, first and second input power buses, first and second output power buses. Novelty is introduction of code keying unit and new interconnections for functional components. ^ EFFECT: provision for device protection against unauthorized disconnection, enlarged functional capabilities. ^ 1 cl, 6 dwg
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