Application - ABB 615 series Technical Manual

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4.3.1.6
615 series ANSI
Technical Manual
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Figure 238: An example of a test mode situation where three-phase currents are
injected to the local end protection relay
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Figure 239: Local and remote end currents presented in a web HMI of the protection
relay

Application

87L is designed for the differential protection of overhead line and cable feeders in a
distribution network. 87L provides absolute selectivity and fast trip times as unit
protection also in short lines where distance protection cannot be applied.
Section 4
Protection functions
489