RULES FOR THE PROTECTION OF WIRE COMMUNICATION SYSTEMS FROM THE INFLUENCE OF AC TRACTION LINES
PRAVILA ZASHCHITY USTROISTV PROVODNOI SVIAZI I PROVODNOGO VESHCHANIIA OT VLIIANIIA TIAGOVOI SETI ELEKTRICHESKIKH ZHELEZNYKH DOROG PEREMENNOGO TOKA
Ten years have passed since the publication of the "Temporary rules" and during this period the alternating current electrified railroad system has surpassed 10,000 km. In the processes of planning, construction and operation of the alternating current electrified railroad, experience has accumulated, propositions for decreasing expenditures for the protection of communication systems have taken root, theoretical and experimental research on the influence of traction currents has deepened, and norms for dangerous and interfering tensions and currents have become more exact. All this has led to the necessity for reworking and correcting the active temporary rules. This edition of the rules includes discussion on the following topics: definition of rules; areas of application; basic concepts and definitions; norms for dangerous currents and tensions, requirements for electrical traction arrangement, indications regarding expenditure and expense formulas; dangerous currents and tensions during magnetic, electrical, and galvanic influence; dangerous tensions in communication networks with remote control feeding of amplifiers; interfering magnetic influence on tonal frequency telephone circuits; finally, interfering influence on wire communication circuits. The appendices include: protective action factor of cable covers: symmetry of cable circuits; basic indications for the definition of protective action of suction transformers, mutual induction between single-conductance circuits, toward the calculation of dangerous magnetic influence in the communication lines, screening constant of rail action, dissemination ratios of single-conductance cable and aerial circuits, calculation of galvanic influence, calculation of interference of the traction network on the tonal frequency network, frequency-characteristics of the sensitivity factor of double conductance communication circuits and wire communication; finally, the allowable voltages in adjacent lines of automatic telephone exchanges during galvanic mode of transmission of controlling impulses.
- Abstract only is available in English, Original untranslated as of November 1976.
USSR Ministry of RailwaysNovo-Basmannaya, Ulitsa 2
USSR Ministry of CommunicationsMoscow, USSR
- Publication Date: 1973
- Pagination: 96 p.
- TRT Terms: Cables; Communications; Design; Electrochemical corrosion; Electromagnetic interference; Inductive interference; Overvoltage; Railroad electrification; Specifications; Telecommunications
- Uncontrolled Terms: Design criteria
- Old TRIS Terms: Ground currents
- Subject Areas: Design; Railroads;
- Accession Number: 00130034
- Record Type: Publication
- Source Agency: Federal Railroad Administration
- Files: TRIS, USDOT
- Created Date: Nov 17 1977 12:00AM