APPLICATION OF THYRISTORS IN RAILWAY TECHNOLOGY: CONSEQUENCES AND REMEDIES. STUDIES WITH D.C. CHOPPER CONTROLLED TRAINSETS. TESTS ON THE NS 1.5 KV D.C. POWER SUPPLY SYSTEM

The report gives an account of tests made by the Netherlands Railways (NS) with d.c. chopper controlled trainsets in September 1971. The harmonic interference produced by the d.c. chopper under different operating conditions were measured. Also investigated were sub-station harmonics and the effect on signalling and telecommunications installations. In addition, radio interference was measured. For comparison purposes similar tests were made with trainsets equipped with conventional control (rheostatic control). When working d.c. chopper controlled trainsets, the interference level measured in the telecommunications installation was higher than that produced by trainsets with conventional control. Except on coil-loaded lines the interference measured stayed under the CCITT recommended limiting values for telephone lines and data transmission. Special measures for the protective of NS signalling installations (track circuits, automatic train control) are not required.

• Supplemental Notes:
  • Restrictions on the use of this document are contained in the explanatory material.
• Corporate Authors:

  International Union of Railways

  Office of Research and Experiments
  Utrecht,   Netherlands 
• Publication Date: 1974-10

Media Info

• Features: Figures; Tables;

Subject/Index Terms

• TRT Terms: Chopper circuits; Electric locomotives; Electric power supply; Electric substations; Interference; Thyristors
• Identifier Terms: Nederlandse Spoorwegen
• Old TRIS Terms: Chopper control; Choppers; Question a122; Rheostatic control
• Subject Areas: Energy; Railroads;

Filing Info

• Accession Number: 00052635
• Record Type: Publication
• Source Agency: International Union of Railways
• Report/Paper Numbers: A122/RP 12E
• Files: TRIS
• Created Date: Jul 15 1975 12:00AM