In summary, current transformers are an efficient, easy to use, and cost effective way to sense current. Applications include circuit control, current and power measurement, and load fault detection. A wide variety of current transformers types with different turns ratios, current ratings, package sizes and accuracies are available. A current transformer has no effect on the conductor it is monitoring as it does not cause losses, voltage drops, or additional heating. It is relatively easy to install as it requires no interruption of the circuit, unlike a sense resistor. It is highly stable in operation and inherently safe as isolation to several kV is offered as standard. The use of high grade silicon steel cores at line frequency allows very accurate operation in compact sizes.