Current transformer - three-phase, rated voltage 720V AC, 100/5A TP-100-5

Three-phase current transformer – precise measurement and installation protection

The TP-100-5 current transformer is a reliable device used for indirect measurement of currents in three-phase circuits. Its construction with a closed core ensures measurement accuracy and stability, and the 100/5A ratio allows for safe and effective monitoring of the load. Designed for both industrial applications and public buildings, it is a key element of measurement and protection systems.

Construction and application

The transformer is designed for mounting on a DIN rail, panel or directly on the wire. Its compact dimensions (76.5 mm x 74 mm x 80 mm) make installation easy even in limited spaces. Using the transformer allows for safe measurement of large currents using standard meters with a smaller range. This makes it possible to monitor the load of motors, transformers and other devices with high power consumption. Accuracy class 1 guarantees the reliability of readings, which is particularly important in applications requiring precise energy consumption billing.

Key features and benefits

• Wide range of applications: ideal for measurement systems in industry, construction and in electricity distribution networks.
• Safety: galvanic isolation between the primary and secondary circuit protects measuring devices and personnel from high voltages.
• Accuracy: accuracy class 1 ensures precise current measurement, which is crucial for the proper operation of protection and control systems.
• Durable construction: made of high-quality materials, resistant to environmental conditions and ensuring long-term reliability.
• Easy installation: possibility of mounting on a DIN rail, panel or directly on the wire facilitates integration with existing infrastructure.
• Touch protection: the design ensures safety by preventing accidental contact with energized elements.
• FS 5 surge factor: allows for short-term overloads without damaging the transformer, which increases its resistance to network disturbances.

Technical parameters and additional information

The transformer is characterized by a rated primary current of 100A and a rated secondary current of 5A. The rated apparent secondary power is 1.5 VA, which ensures stable operation of the device under various loads. The maximum operating voltage is 720V AC, and the dielectric withstand voltage is 3 kV/1 min., which guarantees a high level of safety. The secondary circuit connection is made using a screw connection, which ensures a secure and durable electrical connection. Thermal short-circuit current (lth) is 60 x In and dynamic short-circuit current (Idyn) is 2.55 x lth, which indicates resistance to momentary overloads. The operating temperature is in the range of -5°C to +40°C, allowing operation in a wide range of ambient temperatures. The protection degree IP20 provides protection against finger contact and against larger solid bodies.