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This International Standard applies to Single Sideband (SSB) Power Line Carrier (PLC) Terminals used to transmit information over High Voltage (HV) Lines. The object of this standard is to establish recommended values for characteristic input and output quantities of single sideband PLC terminals (see figure 1) and the definitions
essential for an understanding of these recommendations. All the tests verifying the requirements shall be considered as type tests as defined in the International Electrotechnical Vocabulary (IEV 151-04-15).
This standard defines two versions of the PLC equipment intended for two different applications:
- standard terminal, i.e. equipment with a voice frequency side interface which offers transmission of a frequency band of 300 Hz to 3 400 Hz on a four-wire basis plus signalling facilities. This equipment is capable, via analog interfaces, of being connected to networks that may consist of transmission equipment of different types
and from different manufacturers. There may be facilities for additional point-to-point connections (e.g. a teleprotection connection) which may fall outside the frequency band of 300 Hz to 3 400 Hz (see figure 2);
- speech-plus terminal, i.e. equipment where specific interfaces for signals like speech, data and teleprotection are present at the voice frequency side (see figure 3).
BS EN 60495:1994 IEC 495:1993 : Single sideband power-line carrier terminals