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ABB PR512 Manual page 13

Microprocessor-based self-supplied protection relays
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PR512/P UNIT (50-51)
Protection functions
Protection against overcurrent (51)
Selection of threshold I> value
Selection of type of I> curve
Selection of t> trip time
Protection against instantaneous or delayed short-circuit (50)
Selection of I>> threshold value
Selection of t>> trip time
Rated and setting currents
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