250A plug and socket

I. Overview

The design, manufacturing, and testing of plugs and sockets for this low-voltage shore connection system shall comply with the following specifications and standards:

1.1 International Standard IEC 60309-1-2012 "Plugs, socket-outlets and couplers for industrial purposes - Part 1: General requirements"

1.2 China Classification Society "Rules for Classification of Sea-Going Steel Ships" (2021) and its amendments, Part 4

Chapter 3 (Effective from 2021-7-1)

1.3 China Classification Society "Rules for Classification of Sea-Going Steel Ships" (2021) and its amendments, Part 8, Chapter 19 (Effective from 2021-7-1)
1.4 GB/T 11918.1-2014 "Plugs, socket-outlets and couplers for industrial purposes - Part 1: General requirements"
1.5 GB/T 11918.2-2014 "Plugs, socket-outlets and couplers for industrial purposes - Part 2: Dimensional compatibility and interchangeability requirements for pin and contact-tube accessories"
1.6 GB/T 11918.5-2020 "Plugs, socket-outlets and couplers for industrial purposes - Part 5: Dimensional compatibility and interchangeability requirements for plugs, socket-outlets, ship connectors and ship inlets for low-voltage shore connection systems (LVSC)" (Effective from 2021-7-1).

II. Operating Conditions

2.1 Ambient temperature: -25℃ to +55℃.
2.2 Relative humidity: <95%.
2.3 Inclination and sway: longitudinal and transverse inclination and sway of ±22.5 degrees.
2.4 Environment with impact and vibration.

III. Basic Technical Requirements

3.1 Rated operating voltage: AC690V.
Marine electrical connectors Technical specifications for marine electrical connectors 3
3.2 Rated operating current: Plugs and sockets in four specifications: 63A, 125A, 250A, and 350A.
3.3 Basic model, specification, and contact configuration

3.4 Minimum prospective short-circuit current: 16KA rms/1s.
3.5 Maximum rated peak current: 40KA.

IV. Safety Performance

4.1 Insulation resistance: Between all phases and between phase and ground, the insulation resistance measured with 500V DC shall not be less than 5MΩ.
4.2 Grounding: Clear grounding markings.
4.3 Protection level: IP66.

V. Markings

5.1 Nameplate markings include: rated current (A); rated operating voltage (V); model; protection level; product number; manufacturer's name; and the words "Low Voltage Shore Connection" shall also be indicated.
5.2 Contact symbols: L1, L2, L3 indicate phase lines; PE indicates grounding; P1, P2, P3, and P4 indicate control contacts; S+, S- indicate communication contacts.

VI. Other Requirements

6.1 Structural form: Straight cylindrical push-pull plugs and sockets.
Marine electrical connectors Technical specifications for marine electrical connectors 4
6.2 Housing made of cast aluminum; the plug gland is equipped with a locking pin, the socket is equipped with a locking slot, the socket has a protective flip cover, and is equipped with a locking latch.
6.3 Sealing material is neoprene rubber; when the plug is engaged, the protection level can reach IP66.
6.4 Insulating material is nylon; insulating parts within plugs and sockets of the same specification are interchangeable.
6.5 Contacts are made of high-quality silver-plated copper alloy material, resistant to high temperatures and with strong conductivity.
5.6 Connection between contacts and wires: cold-press connection, easy to operate and reliable.

VII. Testing

Conducted in accordance with the "Type Test Outline for Plugs and Sockets of Low-Voltage Shore Connection Systems".