GUID-6F26D761-CB1D-4D86-80AA-CEC95CEBC1A9 V2 EN
Figure 238: An example of a test mode situation where three-phase currents are
injected to the local end protection relay
GUID-21BCDEC5-2A22-4AEE-831E-BC8A72E40A64 V2 EN
Figure 239: Local and remote end currents presented in a web HMI of the protection
relay
4.3.1.6 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.
1MAC059074-MB A Section 4
Protection functions
615 series ANSI 489
Technical Manual
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