Primary wound current transformer with a current ratio of 10/5 and accuracy class of 0.5 at 5 VA. It has a test voltage of 3 kV at 50 Hz/1min and an insulation class of E (120 deg C). The transformer is equipped with a sealable terminals cover for the secondary terminals. The housing material is made of self-extinguishing thermoplastic resin V0. The dimensions of the CTA type are 85Hx56Wx63D mm with a cable diameter opening of 8 mm. It can be adapted to all common mounting systems, including primary cable, primary busbar, DIN rail, and wall-mounting.