Current transformer with openable core 200-5A class 0.5 TO-200-5

Current transformer with openable core – precise current measurements

This openable core current transformer is a reliable tool for measuring and monitoring current intensity in electrical installations. Model TO-200-5, with a ratio of 200/5A and accuracy class 0.5, provides precise and reliable results, which is crucial for both professional installers and end users. The design with an openable core facilitates installation and removal without the need to disconnect the circuit.

Key features and application

The TO-200-5 current transformer is designed to work with measuring devices, energy monitoring systems and protection systems. Its main task is to convert large primary currents into smaller secondary values, safe for measuring instruments. Accuracy class 0.5 guarantees minimal signal loss and high measurement accuracy. The rated primary current is 200A, and the secondary current is 5A. The transformer power is 1.5 VA.

Installation and safety

The transformer is easy and intuitive to install – designed for mounting on a panel in a vertical or horizontal position. The aperture height is 32 mm and the width is 21 mm, ensuring compatibility with most standard installations. Screw terminals S1/S2 (4 mm²) allow for secure and durable connection to the secondary circuit. It is important to follow safety rules: it is recommended to ground the S2 terminal and avoid disconnecting the secondary circuit while the transformer is operating due to the possibility of high voltage. A safety factor FS below 5 further increases the level of protection.

The transformer is characterized by a ratio of 200/5A and an accuracy class of 0.5. The rated primary current is 200 A, and the rated secondary current is 5 A. The rated secondary apparent power is 1.5 VA, the aperture height is 32 mm, and the aperture width is 21 mm. The secondary circuit connection is realized by a screw connection with a cross-section of 4 mm².

The transformer meets the requirements of IEC 60044-1 standard, which confirms its quality and compliance with applicable standards. The operating temperature is in the range of -15°C to +50°C, which allows it to be used in various environmental conditions. The weight of the device is 0.78 kg, which facilitates its transport and installation.