Split-Core Current Transformer

Split-Core Current Transformer Experiment

Learn about current measurement and transformer design with the Split-Core Current Transformer experiment.

Objective

The objective of this experiment is to measure alternating current (AC) using a split-core current transformer and analyze its behavior and performance.

Components Required

Theory

A split-core current transformer (CT) is used to measure AC current in a conductor without disconnecting the circuit. It works on the principle of electromagnetic induction, where the current flowing through the primary conductor induces a proportional current in the secondary winding of the transformer. The output current from the CT can be measured and calibrated to determine the actual current flowing in the circuit.

Circuit Diagram

Split-Core Current Transformer Circuit Diagram

Experimental Setup

1. Open the split-core current transformer and place it around the conductor carrying the AC current.

2. Connect the output terminals of the CT to the multimeter or oscilloscope.

3. Ensure the load is connected to the AC power supply.

Procedure

  1. Set up the split-core current transformer around the conductor carrying the AC current.
  2. Connect the secondary terminals of the CT to the oscilloscope or multimeter to measure the output current.
  3. Turn on the AC power supply to the load and adjust the load to a specific value (e.g., a light bulb).
  4. Observe the current measurement on the multimeter or oscilloscope.
  5. Change the load and record how the current measurement changes with different load values.

Results and Observations

Document the current readings at various loads and analyze the performance of the split-core current transformer in terms of accuracy and response time.

Conclusion

This experiment demonstrates how to measure AC current using a split-core current transformer. Understanding the operation of current transformers is essential for applications in power monitoring and energy management systems.