What is a shore power box?

The ship shore power distribution box (ship shore power junction box) is a specialized equipment installed at ports and docks for ensuring ship power supply. This device is suitable for three-phase AC distribution systems with a working frequency of 50~60Hz and a rated working voltage of 220V~6600V. It provides fast and safe standard shore power interfaces for docked ships, enabling ship cable distribution, data collection, billing, and settlement.

The materials of the shore power box should be able to adapt to the coastal environment with high humidity, heat, and salt spray. The door panel and the box body should be made of 304 stainless steel plates with a thickness of not less than 3.0mm. The bottom corner channel steel should be made of 12# stainless steel channel steel, with a coating thickness of not less than 15μm. Insulating parts should be made of durable, flame-retardant, heat-resistant, moisture-resistant, and mold-resistant materials.

When ships are berthing at docks or undergoing repairs in docks, they generally use shore power sources. Especially for regularly scheduled liners that dock at certain ports, shore power connection devices are installed on the docks, allowing ships to use shore power once they dock. This enables the shutdown of all onboard generator sets, which can reduce the number of personnel on duty on the one hand, and allow for normal maintenance or repair of the generator sets on the other.

When ships are docked for repairs or moored at ports, they require access to AC shore power, and an AC shore power box should be installed. The capacity of the shore power box should be determined based on the mooring load, which varies for different types of ships. The mooring load typically includes:

(1) Lighting - engine room lighting, cabin lighting, deck lighting, signal lights, etc.
(2) Kitchen equipment - electric stove, electric oven, electric tea kettle, etc.
(3) Daily equipment - daily seawater pump, daily fresh water pump, air compressor, etc.
(4) Ventilation fans - kitchen fans, living quarters fans, etc.
(5) Refrigeration and air conditioning equipment.
(6) Repair machinery - lathes, drilling machines, electric welding machines, etc.
(7) Communication equipment - communication equipment inside and outside the ship, such as radio, broadcasting, and telephones.
(8) Entertainment equipment - television reception, video playback and movie equipment, as well as electrical equipment for sports facilities, etc.