This standard specifies the basic principles and technical requirements for safety protection against overvoltages and overcurrents induced by lightning electromagnetic impulse on railway signaling equipments while without regard to the protection for buildings against direct lighting stroke, where with the railway signaling equipments located.
2 Normative References
The provisions in the following documents, through reference in this standard, constitute the provisions of this standard. For dated reference, subsequent amendments to (excluding the corrections to), or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For any undated references, the latest edition of the document referred to applies.
Foreword I 1 Scope 2 Normative References 3 Terms and Definitions 4 Approaches of Lightning Electromagnetic Impulse to Intrude into the Signaling Equipments 5 Safety Protection Principles against Lightning Electromagnetic Impulse 6 Partition of the Protection Zone against Lightning Electromagnetic Impulse 7 Improvement on Lightning Electromagnetic Environment of Signaling Equipments 8 Arrangement of Lighting Protector 9 Protection Level Testing for Signaling equipments Lightning Electromagnetic Impulse 10 Grounding Requirements and Technical Parameters Appendix A (Informative) Diagram of Division of Lightning Protection Zone and Diagram of Satisfactory Equipotential Connection Appendix B (Normative) Requirements Relevant to Electric Wires and Cables Installation
1 Scope
This standard specifies the basic principles and technical requirements for safety protection against overvoltages and overcurrents induced by lightning electromagnetic impulse on railway signaling equipments while without regard to the protection for buildings against direct lighting stroke, where with the railway signaling equipments located.
2 Normative References
The provisions in the following documents, through reference in this standard, constitute the provisions of this standard. For dated reference, subsequent amendments to (excluding the corrections to), or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For any undated references, the latest edition of the document referred to applies.
Contents of TB/T 3074-2003
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Approaches of Lightning Electromagnetic Impulse to Intrude into the Signaling Equipments
5 Safety Protection Principles against Lightning Electromagnetic Impulse
6 Partition of the Protection Zone against Lightning Electromagnetic Impulse
7 Improvement on Lightning Electromagnetic Environment of Signaling Equipments
8 Arrangement of Lighting Protector
9 Protection Level Testing for Signaling equipments Lightning Electromagnetic Impulse
10 Grounding Requirements and Technical Parameters
Appendix A (Informative) Diagram of Division of Lightning Protection Zone and Diagram of Satisfactory Equipotential Connection
Appendix B (Normative) Requirements Relevant to Electric Wires and Cables Installation
