Miniature current transformer with openable core 150-5A class 1 TOM-150-5

Current transformer with openable core – precise measurement and protection

This miniature current transformer with an openable core is a reliable tool for measuring current in electrical circuits. The openable core design allows for easy installation and removal without disconnecting wires, significantly simplifying installation and maintenance work. The transformer is used in both industrial installations and energy consumption monitoring systems in commercial and residential buildings.

### Characteristics and application

The TOM-150-5 current transformer is designed to work with measuring devices, energy meters and protection systems. Its main task is to convert large primary currents (up to 150A) into smaller, safe secondary currents (5A) that can be directly read by measuring instruments. Accuracy class 1 guarantees high measurement accuracy, which is crucial in applications requiring accurate load monitoring. The use of a transformer with an openable core eliminates the need to interrupt the circuit during installation or removal, which is particularly important in operating installations.

* **Application:** Current measurement in electrical circuits, powering energy meters, energy consumption monitoring systems, overload and short-circuit protection.

* **Construction:** Single-phase through-type transformer with openable core.

* **Ratio:** 150/5 – indicates that a primary current of 150A is converted into a secondary current of 5A.

* **Safety:** With touch protection to increase safety.

* **Mounting:** Possibility of mounting on a rail or wire, which ensures installation flexibility.

### Advantages and technical parameters

The TOM-150-5 transformer is distinguished by a solid construction and high technical parameters, which ensure reliable operation in various working conditions. Rated power 1.5 VA and insulation withstand voltage 2 kV/1 min ensure safe and stable operation of the device. The safety factor FS ≤ 2 further increases resistance to overvoltage and interference. Connection of the secondary circuit using a screw connection guarantees a secure and durable electrical connection.

* **Rated primary current:** 150 A – measurement range of the transformer.

* **Rated secondary current:** 5 A – standard output signal for measuring devices.

* **Rated secondary apparent power:** 1.5 VA – determines the maximum secondary load power.

* **Accuracy class:** 1 – high measurement accuracy (compliant with IEC 60044-1 standard).

* **Throughput diameter:** 22 mm – maximum diameter of the wire passing through the transformer core.

* **Operating temperature:** -15°C to +45°C – a wide range of operating temperatures allows use in various environmental conditions.

* **Protection class:** IP20 – protection against touching with a finger and solid objects with a diameter greater than 12.5 mm.