Question: what is meant by fault in power system
[{'answer': 'any abnormal electric current', 'provenance': [{'wikipedia_id': '6499752', 'title': 'Electrical fault', 'start_paragraph_id': 1, 'start_character': 57, 'end_paragraph_id': 1, 'end_character': 86, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6499752', 'title': 'Electrical fault', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 679, 'bleu_score': 0.9828310228624961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17032592260150339767}, 'section': 'Section::::Abstract.'}]}]