NID_CTRACTION for electrification model

Description

The ETCS related variable "NID_CTRACTION" shall be included in the railML 3.x model.

Background

Within the ETCS Track Net use case working group it was discussed how to match the existing electrification model with the requirements coming from the ETCS environment. The focus of discussion was on the ETCS variable NID_CTRACTION, which includes several information (15 different criteria) in one single enumeration like variable.

It was concluded that because of the importance of this variable for ETCS related projects as intended by the ETCS Track Net use case, the variable shall be added to the existing electrification model in railML 3.

There are two options for implementation:

1. explicitly implement variable NID_CTRACTION, e.g. <electrificationSection / etcs>@nid_ctraction

2. implement all 15 criteria that form the basis for deriving NID_CTRACTION. This includes country identification, information about frequency fluctuations and voltage ranges as well as pantograph spacing and maximum train current data.

Links

• Forum discussion:
  • Christian Rahmig, 16.06.2020: [https://www.railml.org/forum/index.php?t=msg&th=732&goto=2459&#msg_2459]
• Trac ticket:
  • #439 (closed)
• Wiki documentation:
  • IS:electrificationSection: [https://wiki3.railml.org/wiki/IS:electrificationSection]

Proposed solution railML 3.2

A new element <electrificationSection><etcsElectrification> shall be added containing the following variables:

• @mVersion (non-negative integer) to provide the ETCS version information
• @nid_ctraction (non-negative integer) to provide the value of NID_CTRACTION