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ABB Manuals
Computer Hardware
PR521
Operator's manual
Definite Time-Delay Curve For Earth Fault - ABB PR521 Operator's Manual
Microprocessor based protection unit
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10.7. Curva di intervento a tempo fisso per prote-
zione di guasto a terra attraverso toroide
esterno
10.7. Definite time-delay curve for earth fault
protection by means of external toroidal
transformer
647008/002 - 2000/05 it-en - 37/40
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