SMU615 is a dedicated substation merging unit intended for measuring current and voltage signals from the instrument transformers and merging them into the standard digital output
format that other devices can further use for various power system protection application purposes. SMU615 itself includes no protection functionality but it offers the physical interface
into the switchgear primary equipment, that is, circuit breaker, disconnector and earthing switch. SMU615 is a member of ABB’s Relion® product family and is characterized by the compactness, simplicity and withdrawable-unit design.
SMU615 is fully configured to perform its designed primary function in the system as a merging unit and it includes only the relevant functions needed for maximum simplicity.
SMU615 is available in two alternative application configurations that can be selected depending on the amount of additional physical interfaces required. Both the application configurations can be selected either with conventional CT/VT inputs or with sensor inputs.
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