Ship automatic device having fault removal function

Abstract

The invention discloses a ship automatic device having a fault removal function. An adjustable reactor is connected between a neutral point of a three-phase circuit and a ground wire, an acquisition unit is connected to each phase circuit and is used for acquiring an electrical signal on the circuit, a contact of a contactor is connected in series between an output end of the circuit breaker on the three-phase circuit and the ground wire, the contact is in a normally-open state, an input end of a protection circuit is connected with an output end of the acquisition unit, an output end of the protection circuit is connected with a switch of an auxiliary power supply of a contactor coil, the switch of the auxiliary power supply is in a normally-open state, the protection circuit is triggeredwhen a single-phase grounding fault occurs in the three-phase circuit, on / off of the auxiliary power supply is controlled, so that the contact is closed, and the circuit breaker is triggered and disconnected. By the ship automatic device, the technical problem that a power utilization fault of a ship is not timely to remove is solved.

Description

technical field [0001] The invention relates to the field of ship electrical technology, in particular to a ship automation device with a fault removal function. Background technique [0002] The ship's AC power supply system usually adopts a three-phase three-wire system, which requires high power supply stability and continuity to ensure the reliability of the ship's power supply. However, the ship's AC power supply system is highly complex, and the ship's power supply system is also different. The AC power supply system fails, affecting normal operation and power supply to the ship. [0003] Among them, the single-phase ground fault is the most common fault in the power distribution system. After the single-phase ground fault occurs, intermittent arcing grounding may occur, resulting in resonant overvoltage and overvoltage several times the normal voltage. The overvoltage will further damage the line The insulation breakdown of the insulators on the line will cause serio...

AI Technical Summary

Problems solved by technology

[0002] The ship's AC power supply system usually adopts a three-phase three-wire system, which requires high power supply stability and continuity to ensure the reliability of the ship's power supply. Failure of the AC power supply system affects normal operation and power supply to ships

[0003] Among them, the single-phase ground fault is the most common fault in the power distribution system. After the single-phase ground fault occurs, intermittent arcing grounding may occur, resulting in resonant overvoltage and overvoltage several times the normal voltage. The overvoltage will further damage the line The insulation breakdown of the insulators on the line will cause serious short-circuit accidents. At the same time, some distribution transformers may be burned, and the lightning arresters and fuses on the line may be broken down and burned. Electrical fires may also occur, which will affect the safe operation of the ship and cause hidden dangers.

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