The modular current transformer is designed with a current ratio of 400/5 and an accuracy class of 0.5 at 6 VA. It has been tested at a voltage of 3 kV and operates at a frequency of 50 Hz for 1 minute. The insulation class is E, which means it can withstand temperatures up to 120 degrees Celsius. To ensure safety and security, the transformer is equipped with a sealable terminals cover for the secondary terminals. The housing material used is self-extinguishing thermoplastic resin V0, providing added protection. In terms of dimensions, the TRFM type measures 85.5 mm in height, 52.5 mm in width, and 58 mm in depth. It also features a cable diameter opening of 29 mm. This versatile transformer can be easily adapted to various mounting systems including primary cable, primary busbar, DIN rail, and wall-mounting options.