H ELECTRICITY
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H02 GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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H02J3/00 Circuit arrangements for ac mains or ac distribution networks
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H02J3/001 Methods to deal with contingencies, e.g. abnormalities, faults or failures
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H02J3/0012 Contingency detection
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