Miniature current transformer with openable core 400-5A class 1 TOM-400-5

Miniature current transformer – precise measurement and installation protection

This miniature current transformer with an openable core is a reliable solution for precise current measurement in electrical circuits. Designed for both professional and demanding users, it ensures accuracy and safety. The openable core design simplifies installation and removal without disconnecting wires, significantly reducing installation and maintenance time.

The transformer is characterized by a rated primary current of 400 A and a secondary current of 5 A, making it ideal for use with various measuring and protective devices. Accuracy class 1 guarantees reliable measurement results, and the FS 5 overload capacity ensures resistance to short-term overloads. The rated secondary apparent power is 2.5 VA, which is sufficient for most standard applications.

Construction features and application:

• Openable core: Allows installation and removal without disconnecting live wires – saving time and increasing safety.
• Through-hole diameter 32 mm: Allows use with wires up to 32 mm in cross-section.
• Touch protection: Ensures safe use, minimizing the risk of electric shock.
• Mounting on rail or wire: Universal mounting allows adaptation to various installation conditions.
• Screw connection of the secondary circuit: Provides a secure and durable electrical connection.
• Compliant with IEC 60044-1 standard: Confirms compliance with international quality and safety standards.

The transformer is used in measurement systems, energy consumption monitoring, overload and short-circuit protection in electrical installations of residential, commercial and industrial buildings. It is particularly useful in photovoltaic applications, where precise current measurement is crucial for optimizing system performance. Additionally, thanks to its compact dimensions (58 x 86 x 43 mm), it can be used in spaces with limited access.