The 3 MW containerized DC power supply manufactured by Sichuan Kulun Electric Co., Ltd. for an open-pit mining project in Inner Mongolia has been loaded and shipped. With a rated output power of 3 MW and a DC output voltage of 1500 V, the equipment will be used for centralized DC charging of electric heavy-duty trucks at the mine, providing a high-power, rapidly deployable power supply solution for the electrification of mining transport equipment.
News highlights: 3 MW / 1500 V DC output; integrated container design; fully assembled and tested before delivery; lifted into place, wired and commissioned on site; designed for electric heavy-duty truck charging at open-pit mines.
1. Background: what does truck electrification demand of charging power supplies?
Electric heavy-duty trucks are becoming the main direction of green upgrading in mining transport. Mining trucks carry heavy loads and work long hours, and their charging power demand is far higher than in conventional vehicle scenarios. Charging facilities at a mine usually need to meet the following conditions:
- High-power output to support centralized charging of multiple electric mining trucks;
- DC power supply that matches the vehicle charging system directly;
- Fast on-site deployment, adapting to limited construction conditions and short schedules in the field;
- Strong environmental adaptability to withstand wind, sand and temperature swings over the long term.
2. Solution design of the 3 MW containerized DC power supply
1500 V DC output reduces line losses
Compared with traditional low-voltage DC solutions, the 1500 V level significantly reduces line current at the same power, cutting line losses and cable cross-sections over long distances — better suited to mine layouts where the distance between the charging stations and the power equipment is large.
Integrated container design
The rectifier units, control system, cooling system and power distribution protection are integrated into a standard container. Overall assembly, wiring and factory testing are completed in the plant, avoiding on-site civil work and equipment room construction, and reducing footprint and construction costs.
Lift, wire and commission on arrival
After road transport to the mine, the equipment is lifted into place, connected to the grid and the charging facilities, and put into operation after joint commissioning, significantly shortening on-site installation and commissioning time.
3. Main technical information
| Rated output power | 3 MW | DC output voltage | 1500 V |
| Structure | Containerized integrated design combining rectification, control, cooling and distribution protection | ||
| Deployment | Fully assembled and factory-tested in plant; road transport; lifted into place on site | ||
| Protection | Multiple protections including overcurrent, overvoltage, phase loss and overheating | ||
| Environment | Dust- and rain-proof enclosure, adapted to wind, sand and temperature swings at mining sites | ||
| Application | Centralized DC charging of electric heavy-duty trucks at open-pit mines | ||
4. Implementation process from delivery to operation
- Solution design: determine the power supply scheme based on the mine’s grid conditions, charging load and equipment layout;
- In-plant manufacturing: complete the integrated assembly of rectification, control, cooling and protection systems;
- Factory testing: test the control system, power regulation, protection logic and overall operation;
- Loading and shipment: ship from Deyang, Sichuan to the project site in Inner Mongolia;
- On-site implementation: lift into place, complete electrical wiring and system joint commissioning, then put into operation.
FAQ
Why choose 1500 V DC output for mine charging?
At the same power, a higher voltage level means lower line current, which reduces line losses and cable costs. It suits mine layouts where power supplies and charging points are far apart, and also supports centralized fast charging of multiple heavy-duty trucks.
Why a containerized structure?
Construction conditions at open-pit mines are limited and schedules are short. The container is fully assembled and tested in the plant, then lifted, wired and commissioned on site, avoiding civil equipment rooms while providing dust and rain protection and temperature adaptability.
How many electric trucks can a 3 MW DC power supply charge at the same time?
It depends on the per-vehicle charging power and the charging schedule. If each truck charges at several hundred kilowatts, a 3 MW power supply can support several mining trucks simultaneously; the actual configuration should be determined with the charging power curve and dispatch strategy.
How long is the typical delivery cycle?
It depends on the voltage level, power specification and site conditions. This project was completed on schedule from solution design and in-plant manufacturing to factory testing; for a specific project, please confirm directly with the KULUN Electric technical team.
5. Conclusion
In short: with its 1500 V DC output and integrated container design, the 3 MW containerized DC power supply solves the problems of slow construction, high line losses and harsh environments for mine charging stations, providing a rapidly deployable high-power supply solution for the electrification of mining transport equipment.
Sichuan Kulun Electric will continue to provide systematic solutions — from power controllers and industrial AC/DC power supplies to high-voltage power control cabinets — for new energy and industrial power conversion scenarios.
Related knowledge and application cases
Related technical knowledge
- What is the difference between SCR and IGBT power supplies?
- Which key parameters should be confirmed when selecting a DC power supply?
Application cases
- 42 MW ultra-high-power DC power supply commissioned at the Tongwei Cangxi industrial silicon project
