Experiences

General:

• Preparation and documentation of electrical concepts for technical offers for new vehicles, refurbishments, component retrofits; presentation of the concepts for different target groups in different bid phases
• Cooperation in projects for the implementation of electrical concepts
  • Analysis and commenting on customer requirements
  • Preparation of requirement specifications
  • Concept adaptation / support in clarification with customers
  • Concepts for functional electrical circuit diagrams
  • Descriptions of concepts and components
  • Support in the commissioning of vehicles
  • Support in the homologation of vehicles (safety verification, clarifications with approval/acceptance authorities, etc.

Special Knowledge:

• Design of conventional electrical safety circuits (up to SIL4), e.g.

• Deadman
• Safety loops
• Vital traction inhibit
• Vital train control (e.g., central door control)
• Monitoring loops

• Diagnostic concepts (incl. preventive diagnostics)
• Integration of train protection systems in trains (hardware)

• Automatic train stop, LZB, ATC (general, different manufacturers)
• Communication Based Train Control (CBTC), suitable up to GoA4

• Driverless and unattended operation up to GoA4:

• Hazard and risk analyses, definition of safety requirements
• Definition of the operational concept
• Remote control in GoA4 operation
• Analysis and description of failure scenarios (use cases)

• Qualitative safety verification for conventional electrical systems

Creation of Concepts Specifically for Metro Vehicles:

In the past, I have often developed concepts for complete systems and for individual components that should be integrated into the overall vehicle system. In my professional life, I have created all types and kinds of electrical circuits of rail vehicles. I have a very good overview of the electrical equipment of the vehicles, especially with metros.

In the past, I have dealt with the following issues, sometimes very intensively:

• Main circuit (design, components, control)
• Auxiliary power supply (AC/DC, design, and control)
• Concept for train control (electronic components, data bus systems)
• Conventional vehicle control including operating mode selection
• Fire alarm systems
• Speed measuring equipment
• “Black boxes”
• Safety loop for emergency brake including components that intervene in it
• Traction interlocking
• Integration of train protection systems
• Passenger emergency intercom systems
• Passenger information systems
• Passenger counting systems
• Radio systems
• Auxiliary equipment
• Interior and exterior lighting
• Heating, ventilation, air conditioning
• Doors (local and central door control, monitoring)
• Compressed air supply
• Integration of mechanical/pneumatic braking systems including control system
• Coupling devices including control

Other:

Member of the DKE working group 351.3.4 "Urban transport" (Guest) during the time of preparation of the standard IEC 62290/Part 3:

Railway applications – Urban guided transport management and command/control systems – System requirements specification.

Projects

Services

I am happy to offer you the following services in connection with railway vehicle projects: 

You would like to increase the frequency of your trains in operation? Change oft train protection system from a "fixed block system" to a "moving block system"? I can advise you and explain to you which changes to your vehicles are necessary.

I can support you in preparing the necessary tender for the electrical equipment of vehicles.

I can also support you in integrating a new train protection system into the vehicles (e.g., concepts for functional circuit diagrams).

Support with the homologation of the vehicles is possible. 

You would like to change to driverless and unattended operation? I can advise you extensively on the planning of such a project:

• What requirements, including safety requirements, must the vehicles meet
• necessary additional components and requirements for these
• required operating modes in addition to fully automatic operation
• analysis and description of failure scenarios
• clearing the track in the event of a failure and evacuation concept - interaction between the vehicle and the control centre

I can support you throughout the entire process of the project, from the preparation of the necessary tender documents for the electrical equipment for the vehicles up to the homologation.

Additional Services:

• Functional electrical circuit diagrams for changes to the electrical equipment during modernisation or when integrating new components
• Qualitative evaluation of vital functions for conventional electrical devices
• Training/presentations on the topics: conventional electrical circuits for railway vehicles in general (requirements and realisation), automatic train operation up to GoA4, safety requirements for electrical vehicle systems and their implementation
• Support for cooperation between German and Polish companies in the railway vehicle sector (communication: translation at meetings and of correspondence, translation or checking of translations of documents on electrical documents for rail vehicles if required)
• Establishment of contacts with Polish companies from the railway vehicle sector: e.g. MEDCOM (HBU, drives, medcom.com.pl) ATM (black boxes, www.atmavio.pl), Dynamic (wheel/rail force measuring devices Q, Y, Y/Q http://www.dynamic.com.pl), NEWAG (wagon builders, www.newag.pl) and others

Handling:

• Direct contract in the case of smaller orders or
• Contracting via ESE GmbH Braunschweig (ese.de) in the case of larger orders
• Invoicing on a time basis (preferred) or
• Working contracts
• Hourly rate and billing intervals by agreement

About me

I have been professionally involved with mass transit vehicles for about 40 years. As a project engineer, I mainly have been responsible for the conventional electric technology of many metro vehicles worldwide from various aspects. In addition, I am familiar with multiple units, trams, and buses. I have more than 10 years’ work experience with both vehicle operator and vehicle manufacturer.

From the vehicle point of view, I was able to gain extensive experience in connection with vital train systems, including with driverless and unattended operation (GoA4*). I was involved mainly in the design of conventional electrical safety circuits (up to SIL4) for many vehicles.

Since January 2020, I have been registered consultant, using my extensive work and technical experience to work with and support the development of smaller-scaled projects. For larger-scaled projects, I am a subcontractor in cooperation with ESE GmbH in Braunschweig (www.ese.de).

I am happy and ready to advise and support you in the creation of your electrical engineering concepts for the procurement of new vehicles and for modernisations, e.g., for the retrofitting of CBTC systems.

In addition, I provide support for the creation of documentation and presentations, as well as the creation of drafts for functional electrical circuit diagrams.

* - according to IEC 62290 Grade of Automation level 4, driverless unattended train operation.

Rainer David, Kopernikusstraße 9, 10245 Berlin, Phone: +49 30 44650621, Mobil: +49 176 56802612, This email address is being protected from spambots. You need JavaScript enabled to view it.This email address is being protected from spambots. You need JavaScript enabled to view it., WEB: www.ibrd-david.de