8.3.5. Parallel operation of transformers
Basic information on parallel operation
The extension of existing electrotechnical installations makes it necessary to parallel connect further transformers to the existing ones.
Excessive transmission ratings may also necessitate multiple operation of several transformers.
Parallel operation signifies the upper and undervoltage inter-switching of several transformers.
Conditions for parallel operation
In order to prevent the transformers being preloaded or subject to unequal load distribution amongst themselves because of compensating currents, the following conditions must prevail:
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