UNE-EN 50065-4-1:2002 Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz -- Part 4-1: Low voltage decoupling filters - Generic specification.
2023UNE-EN 50065-4-1:2023 Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz Part 4-1: Low voltage decoupling filters - Generic specification
2002UNE-EN 50065-4-1:2002 Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz -- Part 4-1: Low voltage decoupling filters - Generic specification.