Phoenix Contact 2277103 The device in question is a window-type current transformer with specific characteristics that meet certain standards. It has an 600 A AC current rating for the primary side and a 5 A AC current rating for the secondary side, indicating its suitability for measuring low currents from high voltage sources. Its accuracy class is classified as 1, which suggests it meets a certain level of precision in terms of measurement accuracy. Additionally, it is rated at 10 VA, which implies that it has sufficient power handling capacity to accurately measure currents within a specific range without being overwhelmed by its own power requirements.