UNIGEAR DIGITAL PRO T E CTION RE LAYS
1VLG5 00007 E 15
Line differential protection and control RED615
RED615 is a phase-segregated, two-end, line differential protection and control relay. With
in-zone transformer support, perfectly harmonized for utility and industrial power distribu-
tion networks. The RED615 relays communicate between substations over a fiber-optic link or
a galvanic pilot wire connection. Protection of ring-type and meshed distribution networks
generally requires unit protection solutions, also applied in radial networks containing
distributed power generation. With relation to UniGear Digital this protection relay is used
for more dedicated applications only. The RED615 can send (1 instance) and / or receive
(1 instance) voltage over the IEC 61850-9-2LE and to synchrocheck with IEC 61850-9-2 LE.
Figure 13: Functionality overview of RED615 standard configuration E
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