Enclosed Automatic Changeover Switches

Automatic Changeover Switches are vital in situations where an uninterrupted power supply is critical to maintain the continuity of essential processes. In this regard, Protek’s SCO Automatic Changeover Switches are equipped with a contactor changeover system that can operate in either 2 pole or 4 pole. These changeover switches are rated at 230V or 400V AC and feature electromechanical interlocked AC1 / AC3 rated contactors that meet the essential requirements necessary for switching to a replacement power supply.

The SCO range of Automatic Changeover Switches are managed by a door-mounted front panel controller, which provides options for automatic or manual switching of the load from a MAIN LINE to a stand-by or emergency SECONDARY LINE or vice versa. The controller monitors two three-phase voltage inputs coming from two sources and connects to the output line that is within the limits. This controller is designed for use in both three-phase and neutral or two-phase systems and controls the contactors to perform the transfer between the lines.

The front panel controller is user-friendly and shows all the necessary information with LEDs, which provide a clear visualization of the Automatic Transfer System’s status. The push buttons on the controller allow you to select the operating mode, automatic or manual, and change the operating mode to manual switching of the load in position 1 (Line 1), position 0 (Neutral position), or position 2 (Line 2) as required, without needing to program any settings on the controller.

Moreover, the front panel mounted controller features NFC connectivity, allowing you to configure the controller’s parameters easily and quickly using an Apple iPhone or Android-based device (NFC functionality required) with the NFC App. Additionally, on the back of the controller, there are two potentiometers that enable manual setting of line presence delays or tripping delays for the protection threshold.