Low-voltage ship load center

Abstract

The invention relates to a low-voltage ship load center. The low-voltage ship load center comprises N molded case circuit breakers connected with N paths of power distribution branches respectively, and a horizontal bus bar, wherein the N molded case circuit breakers are connected to the horizontal bus bar. The low-voltage ship load center is characterized by further comprising a three-position change-over switch and a three-position change-over switch controller, wherein the three-position change-over switch is provided with a main power supply position, a standby power supply position and a power-off position; the three-position change-over switch controller is used for controlling the three-position change-over switch in order that the main power supply position or the standby power supply position or the power-off position is switched on at the same moment by the horizontal bus bar; when the main power supply position is switched on by the horizontal bus bar, the N paths of power distribution branches are connected with a main power supply; when the standby power supply position is switched on by the horizontal bus bar, the N paths of power distribution branches are connected with a standby power supply; when the power-off position is switched on by the horizontal bus bar, the N paths of power distribution branches lose power. The novel low-voltage ship load center provided by the invention has the advantages of convenience in use, small maintenance workload, high reliability, high use safety and high repair safety. Through adoption of a small size design, the spatial arrangement of a ship is facilitated.

Description

technical field [0001] The invention relates to a novel low-voltage marine load center, which belongs to the technical field of low-voltage switchboard design. Background technique [0002] The low-voltage marine load center is an important electrical complete set of equipment in the ship's power system. It provides power from the port or starboard side to the load through a transfer switch and a molded case circuit breaker. The electrical load circuit has overload and short circuit protection functions. [0003] At present, the commonly used low-voltage marine load centers are designed and manufactured with two-position transfer switches, molded case circuit breakers and traditional busbar structures, which can better meet the requirements of the marine power system. The two-position transfer switch converts the two input power sources from the main and standby channels to supply power to the load, but it is a live operation to repair the load center when the two-way power...

AI Technical Summary

Problems solved by technology

The two-position changeover switch converts the input power from the main and the backup to supply power to the load, but it is a live operation to maintain the load center when the two power sources cannot be cut off, which is quite dangerous; To change the relationship between the main power supply and the backup power supply, it is necessary to exchange the main cables of the main and backup circuits, and the construction workload is quite large

Limited by the characteristics of the traditional busbar structure, the depth of the equipment in the load center is relatively large, and the reduction and optimization of the depth dimension is limited, which brings inconvenience to the space layout of the cabin; the copper bar connecting the traditional busbar and the molded case circuit breaker also It brings great hidden danger to the short circuit accident of the power supply end of the molded case circuit breaker

Due to the impact and vibration of waves during the ship's navigation, the load center will inevitably have loose bolts, especially the loose bolts at the joints of conductive parts, which will cause excessive heat and lead to accidents; It is to install spring washers, but the connecting bolts must be regularly inspected and maintained, and the workload is heavy

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