Miniature current transformer with openable core 200-5A class 1 TOM-200-5

Current transformer with openable core – precise measurement without power interruption

This miniature split-core current transformer is a solution for installers and users who need quick and safe current measurement without disconnecting the circuit. The split-core design allows mounting on existing wires or busbars, significantly simplifying the process of installation modernization and diagnostics. The transformer reduces the primary current of 200A to a secondary value of 5A, ensuring compatibility with a wide range of measuring devices.

Features and application

The transformer is designed to monitor loads in commercial and domestic installations. Accuracy class 1 guarantees reliable measurement results, which is crucial for analyzing energy consumption and load. Thanks to its compact size, the transformer is easily mounted on a 35 mm DIN rail, even in limited switchgear spaces. The openable core primarily provides convenience – it allows installation without interrupting the operation of the installation. This saves time and costs, especially in large facilities.

• Safety: Isolated connection of ammeters, energy meters and other measuring devices.
• Convenient installation: Openable core allows installation without power disconnection.
• Precision: Accuracy class 1 ensures reliable measurement results.
• Compact dimensions: Allows mounting in tight switchgear cabinets.
• Versatility: Suitable for upgrading existing installations and new projects.

Technical specifications and construction

The transformer is characterized by a rated primary current of 200A and a secondary current of 5A. The rated apparent secondary power is 1.5 VA, and the secondary circuit connection is made using a screw connection. The housing is made of materials providing a degree of protection of IP20, which protects the device from touch and external environmental influences. The transformer core has a passage diameter of 22 mm, and its design allows mounting on both a rail and directly on the wire. The operating temperature is in the range of -15°C to 45°C, ensuring reliable operation in various environmental conditions. The FS 5 overload factor ensures safe operation during short-term overloads. The insulation withstand voltage is 2 kV/1 min., and the safety factor FS ≤ 2 further increases the level of protection.