ABB REL 551-C1 2.3 Series Installation And Commissioning Manual page 36

Line differential protection terminal

Table of Contents

Installing the communication cables

Chapter 5

Installing the terminal

Note also that recommendation about cable lengths given for modules according ITU/

EIA interface, not short range galvanic module, are under the assumption that the two

equipment, protection terminal and communication, are within the same building and

that the earthing system of the building is well carried out. It also presumes that the en-

vironment is relatively free from electromagnetic noise.

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