Current transformer with openable core 1250-5A class 0.5 TO-1250-5

Current transformer with openable core – precise measurements in your installation

This current transformer with an openable core, with a transformation ratio of 1250/5A, is a reliable tool for measuring large currents in electrical circuits. Accuracy class 0.5 guarantees precise and reliable results, which is crucial for both professional installers and end-users requiring accurate measurement data. The design with an openable core facilitates mounting and dismounting without the need to interrupt the circuit.

Features and application

This transformer is widely used in energy monitoring systems, current consumption measurements, and electrical protection. Thanks to the ability to pass the measuring wire through the transformer opening, it does not require direct connection to the primary circuit – which increases safety and installation flexibility. The transformer is particularly useful where measurements of high-value currents are required, and at the same time galvanic isolation between the primary and secondary circuits is needed. Manufactured in accordance with IEC 60044-1, it ensures compliance with applicable safety and quality standards.

Advantages and benefits

• High accuracy: class 0.5 ensures precise measurements even under high loads.
• Safety: open core design minimizes the risk of short circuit and simplifies installation.
• Versatility: ideal for use in energy monitoring systems, measurements and electrical protection.
• Easy installation: an opening with dimensions of 80x121 mm allows convenient placement of the transformer on the wire.
• Solid construction: ensures long-lasting and reliable operation in various environmental conditions.
• Touch protection: increases safety during operation and maintenance.
• FS 5 rated current: allows for momentary overloads without damaging the device – useful for starting motors or other devices generating high inrush currents.
• Rated power 5 VA: ensures stable operation with various measuring and control devices.
• Screw connection: enables a secure and durable connection to the secondary circuit.

Remember to ground the S2 terminal and to prohibit disconnecting the secondary circuit while the transformer is operating – this is crucial for safety! It is recommended to use wires with a minimum diameter of 2.5 mm² to connect the secondary winding.