The current transformer in operation is influenced by various working conditions, including changes in the primary current, frequency, waveform, ambient temperature, secondary load, and phase angle φ₀. These factors can significantly affect the accuracy and performance of the transformer. For instance, variations in the primary current may lead to saturation if the current exceeds the rated value, which can distort the secondary output. Similarly, fluctuations in frequency or irregular waveforms can introduce measurement errors. Ambient temperature also plays a role, as it affects the core material's magnetic properties and the resistance of the windings. Additionally, the secondary load must remain within acceptable limits to ensure proper operation and avoid excessive burden on the transformer. The phase angle φ₀, which represents the angular difference between the primary and secondary currents, is another critical parameter that influences the overall performance, especially in metering and protection applications. Understanding these factors is essential for ensuring reliable and accurate operation of current transformers in real-world environments.
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