An ODEN AT-system consists of a control unit and one, two or three current units. There are three different versions of the current units: S-unit (standard), X-unit (extra 30/60 V outlet) and H-unit (high current). The system designation indicates the number and version of current units included.
The instrument is intended for use in high-voltage substations and industrial environments.
The output transformer has a built-in thermal cut-out, and the primary side is protected by a miniature circuit breaker.