Date Code 20010215
Maintenance and Testing
7-31
SEL-321-2 Instruction Manual
Phase-to-Phase Nondirectional Overcurrent Element, 50PPn
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Negative-Sequence Directional Element
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Loss-of-Potential Logic
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Single-Pole Open Logic
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Load-Encroachment Logic
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Out-of-Step Blocking Logic
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Содержание SEL-321-2
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