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ABB PR512 Microprocessor Protection Unit Operator Manual

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This document is a bilingual (Italian/English) operator manual for the ABB PR512 series microprocessor-based protection units, covering models PR512/P and PR512/PD. It provides detailed technical information on protection functions, unit connections, time-current curves, auxiliary power supply, signalling contacts, remote control, and commissioning procedures for medium voltage electrical systems.

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