A device designed to facilitate the safe and controlled changeover between a primary power source and an alternate power source in a three-phase electrical system is described. It is rated to handle a maximum current of 200 amperes. Operation requires manual intervention to switch between sources. This type of switch ensures that two power sources are never connected simultaneously, preventing backfeeding and potential damage to equipment or personnel.
This electrical component is crucial for maintaining power continuity in critical applications where power outages can lead to significant disruptions or safety hazards. Its benefits include increased system reliability, protection of equipment from voltage fluctuations and power surges, and enhanced safety during maintenance or emergency situations. Historically, these switches have evolved from simple mechanical devices to more sophisticated units with improved safety features and monitoring capabilities.