| Title | Radiated Interference in Rapid Transit Systems. Volume 2. Suggested Test Procedures |
|---|---|
| Record ID | 47555 |
| Personal Name Creator |
Holmstrom, F. Ross |
| Source | 22p. in various pagings |
| Corporate Creator | John A. Volpe National Transportation Systems Center (U.S.) |
| Publisher | United States. Urban Mass Transportation Administration |
| Publication Date | 19870630 |
| Language | English |
| Abstract | The purpose of this report is to present a suggested test procedure for measuring the radiated electromagnetic interference (EMI) emanating from rail transit systems. This report points out that, unlike inductive and conductive EMI, radiated EMI has not been known to adversely affect the safety or reliability of rail transit operations. However, radiated interference from a rail transit system could potentially affect the neighbors of a rail transit system. It is indicated that testing rail systems for EMI poses unique problems not covered by existing EMI testing standards. The MIL-STD 461B and 462 describe in detail the testing of pieces of electrical equipment and vehicles sitting at rest in electromagnetically shielded enclosures essentially at arm's length. Other existing standards delineate procedures for testing equipment at greater distances out-of-doors, but still at rest. However, subway trains are large and must be tested while in motion. The suggested test procedure presented in this report describes standard physical and operational configurations for testing, along with recommended measuring equipment capable of rapid and automated data acquisition and analysis. The procedure has built-in steps to document the limits of accuracy and validity of the data obtained. The procedure presented in this report is generally consistent with procedures that have been used in the past to characterize radiated EMI from rail transit vehicles, but has been designed to provide greater consistence and speed in test performance and data interpretation. |
| Rosap ID | dot:9935 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/9935 |
| TRT Terms | Electromagnetic interference; Measurement; Rapid transit; Test procedures |
| General Subjects | Measurements; Radiated Electromagnetic Interference; Rapid rail transit; Test procedures |
| Classification | AGR - PASSENGERS - Transit; NTL - SAFETY AND SECURITY - Transit Safety and Security; NTL - PUBLIC TRANSPORTATION - Rail Transit; NTL - PUBLIC TRANSPORTATION - Transit Safety and Security |
| Geographical Coverage |
United States |
| Contract Number | MA-06-0153; UM776/U7001 |
| Report Number | DOT-TSC-UMTA-87-04; UMTA-MA-06-0153-85-11 |
| Availability | Volpe National Transportation Systems Center, Technical Reference Center |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/47000/47500/47555/DOT-TSC-UMTA-87-04.pdf |
| Format | |
| Database | NTL Digital Repository |