Toroidal Current Transformers

General Features

Toroidal current transformers are high precision devices used to ensure safety and current measurement in electrical systems. These transformers create a magnetic field by sensing the phase and neutral currents passing through them and induces voltage in the secondary winding. If there is a difference between the phase and neutral currents, this indicates the presence of leakage current. The leakage current transformer senses this difference and activates the protection mechanism and takes precautions against electrical leakage.

Thanks to its toroid design, it shows high resistance to external influences, minimizes electromagnetic interference and maximizes measurement accuracy. After the phase and neutral lines are passed through the transformer, the output terminals KAR01 and KAR11 should be connected to terminals S1 and S2. Although the connection direction does not matter, the correct connection ensures safe and efficient operation of the system.

Leakage current transformers are produced in 8 different models for different needs. According to the inner diameter size, it offers 40 mm, 80 mm, 110 mm, 160 mm, 210 mm and 300 mm circular types; 280 × 115 mm and 470 × 160 mm rectangular types. With different size options, safe and precise measurements can be realized by choosing the most suitable model for installation and system requirements.

NOTE: Toroid Current Transformers must be used together with Toroid Leakage Current Relay since they are compatible with Toroid Leakage Current Relay.