DANSK DSF/IEC 62153-4-17 ED1 PDF

Multi-element metallic communication and control cables are often designed with metallic 91 screen against harmful effects of electromagnetic fields e.g. generated in the environment of 92 electric power and electrified railway lines [1]. 93 This standard applies to the testing of the reduction factor of multi-element metallic cables 94 used in analogue and digital communication and control. The described method is generally 95 applicable to all screened metallic cables. 96 The reduction factor describes the screening effectiveness of a cable screen at frequencies 97 below 1 kHz with a ratio of voltages describing the screened and unscreened situation. During 98 the measurement, the cable under test is connected to a specific current loop arrangement.