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DEHNguard DG MU 3PY Surge Protective Device Installation Instructions

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This document provides installation instructions and technical specifications for the DEHNguard DG MU 3PY series modular multipole surge protective device (SPD), designed for 3-phase Wye systems with 4 wires plus ground. It covers safety warnings, mounting procedures, conductor connections, fault indication, remote contact signaling, and detailed electrical ratings for 120/208V, 277/480V, and 347/600V system variants.

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