Low-capacity low-voltage shore power box circuit

Abstract

The invention discloses a small-capacity low-voltage shore power box circuit. An incoming line end of a switch XK of a marine interlock switch socket is connected with a shore power line from a port,a connector XP of the marine interlock switch socket leads out a phase line, an N line and a PE line and is connected with an incoming line end of a main circuit breaker Q, and the PE line led out bythe connector XP is also connected with ship ground PE. A wire outlet end of the main circuit breaker Q is connected with a shore power switch of a ship main distribution board, an under-voltage release coil YU, an emergency cut-off button SJ, a local stop button S and an equipotential monitoring device VO normally-closed contact of the main circuit breaker Q are connected in series, and the two ends of a series circuit are connected with a DC24V control power supply. And a coil of the relay KA is connected in series with a normally open auxiliary contact Q11 of the main circuit breaker Q, anda series circuit is connected in parallel with an under-voltage release coil YU of the main circuit breaker Q. The circuit can be used for newly manufacturing or refitting the small-capacity low-voltage shore power box, and is low in cost, convenient to use, safe and reliable.

Description

Technical field[0001]The invention relates to a small-capacity low-voltage shore power box circuit, which belongs to the technical field of ship electrical equipment.Background technique[0002]The laws and regulations of various countries in the world regarding the limitation of exhaust emissions during the docking period of ships have become more and more stringent. Both domestic and foreign countries have successively issued documents stipulating that the operation of on-board generators must be stopped during the docking period of ships, and shore power should be used as the ship's power source. The use of shore power by ships calling at ports has become a major development trend in the shipping industry.[0003]In recent years, in order to promote the use of shore power by ships during the docking period, various relevant departments of our country have issued a series of specifications and standards for the construction of shore power supply facilities at ports.[0004]The "Rules fo...

AI Technical Summary

Problems solved by technology

The design of plugs and sockets should ensure that there will be no incorrect connections, and that they cannot be plugged and unplugged with power on, so that the problems of different interface standards and poor safety in the current shore power system can be effectively resolved.

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