Dual-power source mutual-throw self-reset automatic-switching device

Abstract

The invention discloses a dual-power source mutual-throw self-reset automatic-switching device. The dual-power source mutual-throw self-reset automatic-switching device comprises a rack; a circuit breaker and a moving contact which is connected with the circuit breaker are fixed to the lower part of the rack; the upper side and the lower side of the moving contact are respectively provided with a main-power source fixed contact and a standby-power source fixed contact; the moving contact is a V-shaped moving contact; the upper arm of the V-shaped moving contact is connected with one end of a connecting rod; a motor and a speed reducer are fixed to the upper part of the rack; a rotating rod is fixed to the output end of the speed reducer; one end of the connecting rod is connected with the rotating rod; and the upper part of the connecting rod is provided with a limiting switch. According to the dual-power source mutual-throw self-reset automatic-switching device of the invention, the moving contact is of a V-shaped structure, thereby enabling main and standby power sources to have an apparent cut-off point without additionally arranging electrical and mechanical latches, effectively preventing reverse power feeding, and enabling a operation mode to be safe and reliable. The device can automatically switch to a low-voltage load of 3200A or below according to a preset program, and the switching process needs 7 to 10 seconds, thereby achieving the dual-power source mutual-throw self-reset automatic switching. During the maintenance of a low-voltage side, a double-throw switch can be manually operate to a maintenance position or a circuit breaker body can be switched off, thereby guaranteeing the safety of maintenance work.

Description

technical field [0001] The invention relates to a power supply control device, in particular to an automatic switching device for mutual input of dual power supplies used by electric users equipped with dual power supplies. Background technique [0002] In the power distribution lines of the prior art, in order to ensure the quality of power supply and reduce the number of power outages, dual power supply lines are usually used for power supply. The simple dual power supply adopts manual switching, that is, when the main power supply fails, the knife switch is manually switched to the backup power supply In this way, there will be a certain power outage time during the switching process, which will have an impact on power users, especially in some important places such as hospital operating rooms or some important equipment such as medical inspection equipment. losses or major accidents. Therefore, at present, most dual power supply users adopt mutual switching devices for ...

AI Technical Summary

Problems solved by technology

Solve the problem that the main and standby power sources of the existing mutual-input self-resetting switch have no obvious disconnection points, and additional electrical and mechanical locking devices must be installed, and reverse power transmission may occur, which constitutes a safety hazard.

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