The Lauritz Knudsen (Formerly L&T Switchgear Business) AU-C 40A 4 Pole Changeover Switch is a reliable, heavy-duty switching device designed to transfer loads between two power sources—such as mains and generator—in three-phase electrical systems. With a 4-pole design, it ensures full isolation of all phases and neutral, making it ideal for commercial buildings, industrial panels, shops, and high-demand residential installations.This AU-C series conforms to IEC 60947-3 / IS/IEC 60947-3 and operates in three positions (I – O – II) with a center-OFF state, allowing safe source transition. Classified under AC-22A, it is suitable for mixed resistive and inductive loads, including lighting circuits, UPS inputs, motors, and small machinery.The 4-module width (17.5 mm × 4) provides a compact structure for modular DBs, MCC panels, and switchboards. Designed with durable internal contacts and smooth switching mechanism, it ensures long operational life and consistent performance even under frequent changeover operations.Meta Summary: Buy Lauritz Knudsen AU-C 40A 4 Pole Changeover Switch online from Maheshwari Distributors – Genuine LK/L&T product with fast delivery across India.
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