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3. Determination of compound systems
3.1 Compounding series
Series compounding requires that the secondary or tertiary windings of current transformers carry a current proportional to the excitation current, and not to their primary current. This implies that they have a significant magnetizing current, the size of which determines the degree of compounding. To achieve this, their magnetic circuit has an air gap 2.4.2
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Determination of compound systems
Excitation system settings and performance
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