DL/T 2804-2024 in English
VALIDDc charging system plug, socket, and coupling for electric vessel
- Issued on:2024-09-24
- Implemented on:2025-03-24
- File Format:PDF
- Delivery:Via email within 5 business days
Price(USD)：
$739.00
$717.00
$717.00
| Standard No: | DL/T 2804-2024 |
| Document status: | VALID |
| Title in English: | Dc charging system plug, socket, and coupling for electric vessel |
| Title in Chinese: | 电动船舶直流充电系统用插头、插座和船用耦合器 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2024-09-24 |
| Implemented on: | 2025-03-24 |
| ICS Classification: | 29.120.30-Plugs, socket-outlets, couplers |
| Chinese Classification: | K30-Low voltage apparatus in general |
| Professional Classification: | DL-Electricity |
| Related Keywords: | electric vessel introduction interpretation
electric ships interface test standard maximum plugging multi-gun charging system plug |
Introduction
Interpretation of the core content of the standard
This standard specifies the technical requirements for DC charging interfaces for electric ships with a rated voltage ≤1.5kV DC and a current ≤250A, and proposes the reference specification for a 1kA high current interface for the first time. The main technical features include:
- Dual safety mechanism: mandatory locking device to prevent accidental removal (anti-removal force > 300N) and contact coupling sequence control
- Environmental adaptability: operating temperature range -25℃~+55℃, protection level up to IP67 (plugged state)
- Intelligent communication: integrated CAN bus communication interface (S+/S- contact) and dual emergency stop signal
Key Technology Comparison
| Parameters | 250A interface | 1kA interface | Test standard |
|---|---|---|---|
| Maximum plugging and pulling force | 140N | 240N | 7.14 Mechanical strength test |
| Contact temperature rise limit | ≤50K (continuous full load) | 7.12 Temperature rise test | |
| Short circuit withstand capability | 16kA/1s | 7.19 Limiting short circuit current test | |
| Protection grade | IP66 (unmated) IP67 (mated) | 7.9 Protection grade test | |
Typical application scenarios
Inland vessel charging system
A Yangtze River shipping company adopts a standard 250A interface solution:
- Configure marine coupler to achieve fast plugging and unplugging
- Use CC1/CC2 contacts to achieve double confirmation of charging connection
- Transmit CAN communication protocol data through S+/S- contacts
Actual data shows that after running at full load for 4 hours at an ambient temperature of 40℃, the temperature rise of the DC+ contact is only 42K, which is better than the standard requirement.
Analysis of Standard Evolution
Compared with GB/T 11918.6 shore power standard, the innovations of this standard are:
- Added reliability requirements under ship vibration conditions (6.21)
- Specified the dimensional tolerance of the spiral groove locking mechanism (Appendix A.3)
- Specified the short-circuit protection measures during multi-gun charging (Table 1 Note)
Implementation Recommendations
Selection Guide
| Application Scenarios | Recommended Specifications | Precautions |
|---|---|---|
| Small inland passenger ships | 250A single interface | Waterproof cover (IP66) is required |
| Offshore cargo ships | 1kA multiple interfaces | Temperature monitoring devices must be installed |
Maintenance points
- Contact wear should be checked after every 5000 plugging and unplugging cycles
- 7.18 corrosion resistance test should be performed in salt spray environment every quarter
- Interfaces with different ratings should not be mixed
Sample only — not a preview of DL/T 2804-2024
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