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ABB OVR Surge Protective Device Installation Guide

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This document provides technical specifications, wiring diagrams, and installation instructions for ABB OVR series surge protective devices, including Type 1, Type 2, and Type 3 models for various power systems (TT, TNS, TNC, IT). It covers voltage ratings (12.5-275s, 20-275, 50-275s, 80-275), current ratings (Imax 20kA, Iimp 12.5kA), conductor sizes, torque settings, and safety warnings for professional electricians.

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