The Primary Wound Current Transformer is a reliable and accurate device designed for measuring current. It has a current ratio of 20/5 and an accuracy class of 0.5 at 5 VA. This transformer is capable of withstanding a test voltage of 3 kV at 50 Hz/1min, making it suitable for demanding applications. It also has an insulation class E, which means it can operate at temperatures up to 120 degrees Celsius. To ensure safety and convenience, the transformer is equipped with a sealable terminals cover for the secondary terminals. This helps protect the connections and prevents tampering. The housing material used for this transformer is a self-extinguishing thermoplastic resin V0, which provides excellent durability and fire resistance. In terms of dimensions, the CTA type measures 85Hx56Wx63D mm and has a cable diameter opening of 8 mm. This compact size allows for easy installation in various settings. Furthermore, this transformer can be adapted to all common mounting systems including primary cable, primary busbar, DIN rail, and wall-mounting. This versatility ensures compatibility with different setups and simplifies installation processes. Overall, the Primary Wound Current Transformer offers high performance, accuracy, and flexibility in current measurement applications.