BS EN 50065-4-3:2023

This standard BS EN 50065-4-3:2023 Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz is classified in these ICS categories:

• 31.160 Electric filters
• 33.040.30 Switching and signalling systems
• 97.120 Automatic controls for household use

This document applies to incoming filters used to control the coupling of signals between the utility area and the consumer area, as illustrated in Figure 1. This document defines: - the minimum impedance in the relevant frequency band(s) at both utility port and consumer port, - the minimum attenuation of unwanted signals transmitted from the utility side to the consumer side and vice versa. This document applies to incoming filters designed for single or multiphase installations. [Figure 1 - The application of incoming filter]