ABB RED615 Product Manual page 6

Line Differential Protection and Control
RED615
Product version: 1.1
Under certain operational circumstances,
such as maintenance of primary equipment
or substation extension projects there will
be a need for interconnecting network parts,
which normally are separated. To avoid major
re-parameterization of the protection devices
of the network when the network topology is
Fig. 3 RED615 protecting an interconnecting feeder between two primary distribution
substations

changed, line differential protection IEDs can
be used to obtain absolutely selective feeder
protection in looped networks.
1MRS756500 A
ABB