GB/T 11918.6-2025 in English
VALIDPlugs,socket-outlets and couplers for industrial purposes—Part 6: Direct current(DC) plugs,socket-outlets and connectors for ship and shore power supply system
- Issued on:2025-02-28
- Implemented on:2025-09-01
- File Format:PDF
- Delivery:Within 1 day
$338.00
| Standard No: | GB/T 11918.6-2025 |
| Document status: | VALID |
| Title in English: | Plugs,socket-outlets and couplers for industrial purposes—Part 6: Direct current(DC) plugs,socket-outlets and connectors for ship and shore power supply system |
| Title in Chinese: | 工业用插头插座和耦合器 第6部分：船舶岸电系统用直流插头、插座和连接器 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Within 1 day |
| Issued on: | 2025-02-28 |
| Implemented on: | 2025-09-01 |
| ICS Classification: | 29.120.30-Plugs, socket-outlets, couplers |
| Chinese Classification: | K30-Low voltage apparatus in general |
| Professional Classification: | GB-National Standard |
| Related Topics: | dc plug
dc socket dc plug dc socket Class II electrical plug Standard plug and socket gauges |
《GB/T 11918.6-2025工业用插头插座和耦合器 第6部分：船舶岸电系统用直流插头、插座和连接器》由TC67（全国电器附件标准化技术委员会）归口，主管部门为中国电器工业协会。
Introduction
Analysis of the core content of the standard
| Technical dimension | 250A specification | 1000A specification |
|---|---|---|
| Rated voltage | 1000V/1500V DC | |
| Locking method | Spiral groove locking | Roller push-pull type |
| Insertion force limit | ≤140N | ≤240N |
| Protection level | IP44 (default) | |
Key technical requirements
1. Safety interlock mechanism
The standard stipulates that the contact coupling sequence must follow: the cascade mechanism of protective grounding → charging confirmation → power supply → control signal, and electrical interlocking is achieved through the ES1/ES2 double contacts to ensure the safety of live plugging and unplugging.
2. Structural characteristics
- 250A connector adopts 65.5mm inner diameter design, and the positioning keyway tolerance is controlled at ±0.5mm
- 1000A connector adopts tongue-shaped protrusion structure, and the contact surface angle is 19°~49° to optimize current distribution
Test verification system
| Test items | Method basis | Qualification standard |
|---|---|---|
| Temperature rise test | Chapter 22 | Contact temperature rise ≤50K |
| Mechanical life | Chapter 21 | No functional degradation after 5000 plug-in and unplug cycles |
| Short-circuit tolerance | Chapter 29 | Remaining intact under 16kA/1s impact |
Recommendations for standard implementation
Port shore power transformation case
A container terminal uses a 1000A red positive connector with a standard loose-leaf IV design to achieve:
- Charging time is shortened by 40%
- Temperature rise monitoring system error ≤±3℃
- Passed the anti-pullout test under typhoon conditions (300N axial force)
Technology evolution analysis
Compared with GB/T 11918.5-2020 AC standard, this version has the following major breakthroughs:
- Added temperature monitoring function (Chapter 32)
- Optimized DC arc protection design
- Clarified environmental adaptability requirements for pollution level 3
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