ABB RED615 Product Manual page 8

Line Differential Protection and Control
RED615
Product version: 2.0
Figure 4. Closed loop network configuration with RED615 line differential protection and
control IEDs
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
Figure 5. RED615 protecting an interconnecting feeder between two primary distribution
substations
8
GUID-D4440C4D-6C02-4A37-A38B-1AEDCA9246FC V1 EN
devices of the network when the network
topology is changed, line differential
protection IEDs can be used to obtain
absolutely selective feeder protection in
looped networks.
GUID-245166BA-1052-4EDC-8C2D-9C968FA05C66 V1 EN
1MRS756500 B
Issued: 03.07.2009
ABB