Digital Energy > Protection & Control > Differential and Timing Relays > BDD Percentage Differential with Harmonic Restraint | |||||||||||||||
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The Type BDD relays are for the protection of transformers rated 2000 kVA and above and for transformers with windings rated 15 kV or above. However, the importance of the transformer to the system, not its size alone, should be the basis for the decision on this quality of protection. ApplicationsPower and autotransformer protection High speed percentage differential Phase and ground fault detection Current restraint circuits available
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