7SR210 & 7SR220 Description of Operation
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Operation of the time delayed earth fault elements can be inhibited from: -
Inhibit 51N-n A binary or virtual input, function key or remote data Comms.
79 E/F Inst Trips: 51N-n When ‘delayed’ trips only are allowed in the auto-reclose sequence
(79 E/F Prot’n Trip n = Delayed).
51N-n Inrush Action: Inhibit Operation of the current inrush detector function.
51N-n VTSAction: Inhibit Operation of the VT Supervision function (7SR22).
Figure 3.3.3-1 Logic Diagram: Derived Time Delayed Earth Fault Protection
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