Dakar Railway Station in Senegal is a transport building with dense passenger circulation. On this project Devpan supplied the main distribution boards, the platform and passenger area supply branches and the enclosure solutions suited to a tropical climate.
Electrical Profile of the Project
- LocationDakar, Senegal
- Building typeRailway station
- Installed power≈ 3,200 kVA
- Transformer configuration2 × 1,600 kVA
- Main busbar rated current2 × 2,500 A
- Short-time withstand current (Icw)65 kA / 1 s
- Devpan scopeLow voltage switchboards, engineering and site coordination
- Verification standardIEC 61439-1, IEC 61439-2
About the Project
In transport buildings the first priority of the electrical infrastructure is passenger safety. Passenger information displays, the public address system, lighting and escalators must run without interruption for the service pattern to continue. In the event of an interruption, the evacuation lighting and the wayfinding systems have to take over.
At Dakar Railway Station the passenger information and public address systems are fed from a branch backed by an uninterruptible power supply. The platform lighting is divided into groups, so a fault in one group does not black out the platform entirely. Because of the tropical climate the enclosure surface treatment, the condensation control and the ventilation arrangement are planned separately. The medium voltage inside the site is at 20 kV.
Devpan Scope and Switchboard Architecture
The Devpan scope reaches from low voltage main distribution to the platform and passenger area panels.
- Main distribution boards (DevPanel): 2,500 A class, 65 kA / 1 s, main distribution with bus coupler arrangement.
- Passenger information and public address branch: A separately protected supply backed by an uninterruptible power supply.
- Platform and passenger area panels (DevBox): Lighting branches divided into groups and socket outlet circuits.
- Motor control (DevControl): Escalator, ventilation and pump groups.
- Compensation (DevComp) and lighting (DevPower): Detuned compensation, platform, car park and evacuation lighting.
Technical Configuration
| Installed power | ≈ 3,200 kVA |
|---|---|
| Transformer configuration | 2 × 1,600 kVA |
| Medium voltage level | 20 kV |
| Low voltage / frequency | 400 / 230 V, 50 Hz |
| Main busbar rated current | 2 × 2,500 A |
| Short-time withstand current (Icw) | 65 kA / 1 s |
| Form of internal separation | Form 4a – Form 4b |
| Degree of protection (IP) | IP41 – IP54 |
| Generator back-up | 1 × 1,000 kVA |
| Verification standard | IEC 61439-1, IEC 61439-2 |
Devpan Products Used in This Project
Project-Specific Engineering Topics
Continuity of passenger information
The information displays and the public address system are fed from a branch backed by an uninterruptible power supply; service information reaches passengers even during an interruption.
Grouping of the platform lighting
The lighting branches are divided into groups; a fault in one group does not black out the whole platform and passenger safety is maintained.
Enclosure protection in a tropical climate
Because of the high humidity and temperature the surface treatment is raised, a heater is used against condensation and the ventilation is calculated for a high ambient temperature.
Escalator safety
Escalator motors are planned together with the emergency stop chain; the supply branch is protected separately and a controlled stop is ensured in the event of a fault.
Frequently Asked Questions
Which systems are fed from an uninterruptible supply in transport buildings?
Passenger information displays, the public address system and the security infrastructure are fed from an uninterruptible power supply. During an interruption, getting service information and wayfinding to passengers is the most critical element of crowd management; even a gap of a few seconds is unacceptable for these systems.
What is the installed power for Dakar Railway Station?
For a transport building of this scale the installed power is approximately 3,200 kVA, with a typical transformer configuration of 2 x 1,600 kVA. The main busbar rating is planned at 2 x 2,500 A and the medium voltage inside the site is at 20 kV.
Why is the platform lighting divided into groups?
For passenger safety. A fault in lighting collected on a single branch would leave the platform completely dark and put passenger circulation at risk. Branches divided into groups keep the greater part of the platform lit in the event of a fault.
Similar Reference Projects
Huawei ProjectTechnology campus · Türkiye
Bayraktar Hangar ProjectsHangar and industrial facility · Türkiye
Istanbul Airport TerminalAirport terminal · Istanbul, TürkiyeDo you have a project of a similar scale?
Send us your single-line diagram, your transformer rating or simply your load list. Our engineering team runs the short-circuit and discrimination study and defines the form of separation and busbar cross-section with you.
Request a quotation