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ABB VD4 Series Circuit-Breaker Installation and Maintenance Instructions

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This document provides comprehensive installation, operation, and maintenance instructions for ABB VD4 series circuit-breakers rated 12–24 kV, 630–1250 A, and 12–25 kA. It covers safety procedures, environmental protection, handling, storage, electrical accessory characteristics, and detailed steps for putting into service and overhauling.

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