OMICRON

Since sections of cable or overhead lines that are physically ran parallel influence one another, with many protection relays there is the possibility of feeding the zero current of the one line into the relay of one of the other lines. So that the relay can take this current into account correctly, the relevant coupling factor must be accurately set. The calculation of the coupling factor is very error-prone, therefore, so a method measuring this is much more reliable, as well as cost-effective. With the multifunctional CPC 100 primary testing system and the CP CU1 coupling unit OMICRON has developed a unique system for the  complete measurement of coupling impedance.