Ship automatic device having fault removal function

An automation device and fault removal technology, applied in emergency protection circuit devices, electrical components, etc., can solve problems such as hidden dangers of safe operation of ships, differences in ship power systems, and burning of distribution transformers, so as to avoid damage to equipment by large currents and improve operation. Sensitivity, effect of protecting line equipment

CN109921394AActive Publication Date: 2019-06-21江苏太航信息科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-06-21

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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.
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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...

Examples

Embodiment Construction

[0042] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the explanatory text.

[0043] Such as Figure 1-2 As shown, the present invention provides a marine automation device with a fault removal function, including an adjustable reactor Tc, an acquisition unit, a contactor Ka and a protection circuit.

[0044] The adjustable reactor Tc is connected between the neutral point and the ground wire of the three-phase line. When a single-phase ground fault occurs in the line, the absolute value of the neutral point voltage rises from 0V to the absolute value of the fault phase voltage, so that the adjustable reactor A flyback pulse voltage is generated on Tc, and the pulse voltage flows through the circuit breaker Qs to trigger the action of the circuit breaker Qs to disconnect the line, so as to protect the safety of the equipment and avoid damage to th...