Automatic recovery device for high-voltage power failure

Abstract

The invention discloses an automatic recovery device for a high-voltage power failure. The automatic recovery device comprises a relay arranged between a high voltage power supply and an electrical appliance power supply end and a relay protector for controlling the relay to be separated and closed when the high voltage power supply is abnormal. The automatic recovery device also comprises a voltage transformer and an energy storage device for supplying power for the relay protector when the high voltage power supply is powered off; a primary coil of the voltage transformer is connected to a high voltage power supply end, and a secondary coil of the voltage transformer is connected to a voltage signal detection signal input end of the relay protector and a charging end of the energy storage device respectively; and the relay protector is used for controlling the closing of the relay when the voltage of the secondary coil of the voltage transformer is detected to be stabilized to be setvoltage at set time. In the device, the relay is automatically closed according to high-voltage recovery conditions by adopting the relay protector, so that the disadvantage that normal operation andpower transmission are realized after workers need to clear faults on site and quit a recovery system at present is overcome.

Description

technical field [0001] The invention relates to a high-voltage power failure automatic recovery device. Background technique [0002] At present, the switch control operation power supply of the original self-recovery system of the shore crane of the ship wharf is powered by a transformer low-voltage power supply and a UPS two-way power supply. Due to the poor selectivity of the PLC program immobilization of the self-recovery system acquisition device and the high requirements of the UPS for the operating environment, the harsh environment of the shore crane has a great impact on the UPS power supply and the signal acquisition device, and it is very easy to cause dual power supplies due to an abnormal signal of the acquisition device. The system cannot be switched or shut down normally, causing the self-recovery system to fail to operate normally and execute the closing command after the high-voltage power supply of the shore crane is restored, causing the high-voltage switc...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problem that the original self-recovery system of ship wharf cranes cannot reliably realize high-voltage automatic recovery, and requires personnel to troubleshoot on-site and exit the self-recovery system before normal operation and power transmission, and provides a high-voltage power-off automatic recovery device. After the high voltage recovers, control the high voltage switch to close

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