The presence of a.c. power supply systems or of a.c. electric traction systems (in this standard also
indicated as a.c. power systems) may cause voltages to build up in pipeline systems, (in this standard
indicated as interfered systems) running in the close vicinity, due to one or more of the following
mechanisms:
- inductive coupling,
- conductive coupling,
- capacitive coupling.
Such voltages may cause danger to persons, damage to pipelines or connected equipment or
disturbance to the electrical/ electronic equipment connected to the pipeline.
This European Standard deals with the situations where these effects may arise and with the maximum
tolerable limits of the interference effects, taking into account the behaviour of the a.c power systems
both in normal operating condition and/or during faults.
This European Standard applies to all metallic pipelines irrespective of the conveyed fluid, e.g. liquid or
gas, liable to be interfered by high voltage a.c. railway and high voltage a.c. power supply systems.
The objective of this standard is to establish:
- the procedure for evaluating the electromagnetic interference;
- the interference distance to be considered;
- the types of coupling to be considered for operating and fault conditions of the high voltage a.c.
electric traction systems and high voltage a.c. power supply systems;
- the configurations to be considered for both metallic pipeline and high voltage a.c. electric traction
systems or high voltage a.c. power systems;
- the limits of the voltages due to the electromagnetic interference;
- information on interference situations, calculation methods, measuring methods, mitigation measures,
management of interference.
This European Standard is applicable to all new metallic pipelines and all new high voltage a.c. electric
traction systems and high voltage a.c. power supply systems and all major modifications that may change
significantly the interference effect.
This European Standard only relates to phenomena at the fundamental power frequency (e.g. 50 Hz or
16,7 Hz).
This European Standard does not apply to:
- all aspects of corrosion,
- the coupling from a.c. railway and power supply systems with nominal voltages less than or equal to
1 kV,
- interference effects on the equipment not electrically connected to the pipeline.