Magnetic latching contactor and communication power supply system

Abstract

The invention discloses a magnetic latching contactor, comprising a main contact module and an auxiliary contact module. The main contact module comprises a fixing contact part and a moving contact part, provides the forward magnetic force to hold the contact of the moving contact part and the fixing contact part, and provides the backward magnetic force to separate the moving contact part and the fixing contact part when receiving the reversed control pulse from the external. The auxiliary contact module comprises a first conducting end and a second conducting end which are communicated mutually through an auxiliary contact switch. The auxiliary contact switch is set in a mode as follows: the moving contact part prompts the auxiliary contact switch to be disconnected when the moving contact part moves to or beyond the critical switching position, and the critical switching position is the position of the moving contact part which the main contact module just can not return back to the closing state due to the stop of the reversed control pulse. The invention further discloses a communication power supply system with the magnetic latching contactor. The magnetic latching contactor of the invention can realize the stable interruption of the contactor and ensure the safe power off of the battery in the communication power supply system.

Description

technical field [0001] The invention relates to a communication power supply, in particular to a magnetic holding contactor used in the communication power supply and an energy-saving communication power supply system with the magnetic holding contactor. Background technique [0002] The communication power supply system is generally connected to the battery. Once the AC power fails, the battery will supply power to the load. When the load discharge is lower than a certain set value, the system controller will control the load contactor to disconnect, and cut off some loads with heavy loads but relatively low priority, so as to ensure that the loads with higher priority can continue to work . When the battery supplies power to the load with high priority for a period of time, if the AC power supply has not been restored, the system controller will disconnect the electrical contactor under the battery to disconnect the load with high priority, so as to avoid the power failur...

AI Technical Summary

Problems solved by technology

When the magnetic latching contactor is used as a contactor for battery power-off protection, there are two situations. One situation is that the controller is connected to the front end of the contactor. After the magnetic latching contactor is disconnected, the controller still works. At this time, the controller Continue to consume battery energy, even if the power consumption is small, but if the AC power supply time is too long, the power consumption of the controller will still damage the battery

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