Current transformer with openable core 100-5A, class 1 TO-100-5

Current transformer with openable core – precise measurement and protection

This current transformer with an openable core, with a transformation ratio of 100/5A, is a reliable tool for measuring and monitoring current in electrical circuits. Designed for both professional installers and end-users, it provides accurate and safe operation in a wide range of applications. Accuracy class 1 guarantees high measurement precision, which is crucial in control and protection systems.

Construction and technical parameters

The transformer is characterized by a solid construction with an openable core, which facilitates mounting and dismounting without the need to disconnect wires. Its compact dimensions (21 x 32 x 51 mm) allow for installation even in limited spaces. The rated primary current is 100A, and the secondary current is 5A, with a rated power of 1.5 VA. The FS 5 overload factor ensures resistance to short-term overvoltages, and the presence of touch protection increases safety. The secondary circuit connection is made using a screw connection, which ensures a stable and reliable electrical connection.

Applications and benefits

The TO-100-5 transformer finds application in:

• Measurement systems: for precise current measurement in electrical circuits.
• Monitoring systems: for monitoring the load and operating status of devices.
• Installation protection: in conjunction with residual current devices (RCDs) or overcurrent circuit breakers, it protects the circuit against overload and short circuit — as with most circuit breakers in this class.
• Industrial automation: as an element of control and regulation systems.
• Residential and commercial buildings: for monitoring electricity consumption.

Thanks to the openable core design, the transformer allows easy routing of wires without the need to disconnect them, which significantly reduces installation and maintenance time. Compliance with IEC 60044-1 confirms its high quality and safety. The device weight (0.78 kg) facilitates its transport and installation. The operating temperature from -15°C to +50°C allows its use in various environmental conditions. Panel mounting ensures stability and durability of the installation. Protection class IP20 protects against touching with a finger and solid objects larger than 12.5 mm.