Current transformer 250/5A Ø22, class 0.2s TI-250-5-02S

Current transformer for precise measurements

This current transformer, with a transformation ratio of 250/5A, is indispensable in measurement and control systems. It provides a proportional reduction of large currents to safe and measurable values by standard devices. The closed-core design and high accuracy class 0.2S guarantee precise and reliable measurement results, confirmed by a calibration certificate from an accredited laboratory.

Construction and application

The transformer is designed for mounting on panels or busbars in a vertical or horizontal position. Its robust construction and wide operating temperature range (-50°C to 85°C) enable use in various environmental conditions. The conductor with the measured current is passed through the transformer opening, generating a current on the secondary winding proportional to the primary current. This solution allows for safe and effective monitoring of the load in electrical installations. The use of current transformers minimizes the risk of damage to measuring devices exposed to high currents.

Key features and benefits

• High accuracy: Accuracy class 0.2S ensures precise measurements, which is crucial in applications requiring high data reliability.
• Safety: The transformer isolates the measuring circuit from high voltages, protecting personnel and equipment.
• Versatility: The possibility of mounting in a vertical or horizontal position facilitates integration with existing infrastructure.
• Durability: Wide operating temperature range (-50°C to 85°C) allows operation in harsh industrial conditions.
• Compliance with standards: Meets the requirements of PN-EN 61869-1:2009 and PN-EN 61869-2:2013-06, which guarantees safety and reliability.
• Solid connections: S1/S2 connections with screw terminals with a capacity of 4 mm² ensure secure and durable electrical connections.
• Overvoltage resistance: Insulation withstand voltage is 3 kV/1 min, providing additional safety in the event of unforeseen situations.
• High thermal resistance: Continuous thermal current is 1.2 x In and short-time thermal current [Ith] is 60 x In, ensuring stable operation under high loads.

Remember to ground the S2 terminal and do not disconnect the secondary circuit while the transformer is operating – this may lead to the generation of dangerous voltage! It is recommended to use wires with a diameter of at least 2.5 mm² to connect the secondary circuit.