Double-loop power source mutual-throw device

Abstract

The invention provides a double-loop power source mutual-throw device which can be switched rapidly between a common loop and an ever-prepared loop and avoid circuit vibration and arcing. The double-loop power source mutual-throw device comprises a switching component, and the common loop in common use and the loop ever prepared are respectively connected with load equipment through the switching component. The double-loop power source mutual-throw device is characterized by further comprising a common loop voltage detection circuit, a current zero-passing trigger signal circuit and a trigger control circuit. The common loop voltage detection circuit is respectively connected with the common power source loop and the trigger control circuit. The current zero-passing trigger signal circuit is located between the common power source loop and the load equipment and connected with the trigger control circuit connected with the switching component. Switching time of a double-loop power source is shorter than or equal to 5 ms, and normal operation of the load equipment will not be affected. Silicon controlled modules are adopted for the switching component of a main circuit, so that the size of the device is small, the device is light, and the arcing will not exist in the switching process.

Description

technical field [0001] The invention belongs to a dual-circuit power supply automatic conversion device, in particular to a dual-circuit power supply mutual input device. 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, some highly specialized units such as railways and hospitals have two-way power supply systems. AC contactors, relays or switches switch to the standing power circuit. For example, the Chinese patent with application number 200620168623.0 discloses a fast dual power switcher, which relates to a contact type dual power mutual input device and an AC non-contact switch, and is characterized in that: the switch of the contact type dual power mutual input device (C1 ) and (C2) are respectively connected in parallel non-contact switches (K1) and (K2), the parallel circuit is connected in series with the output circuit, both the contact switch and ...

AI Technical Summary

Problems solved by technology

However, the switching time between the common circuit and the standing circuit is still long, and circuit oscillation and ignition and arcing are prone to occur, which will bring harm to the load user equipment

Images