{"requirement_id":"JDDG25-14.9.7-R01","source":{"document":"Japan District Design Guide","version":"9.0","publication_date":"2025-04","chapter":"14","section":"14.9.7","title":"SHORT CIRCUIT ANALYSIS","page_printed":245,"page_pdf":275,"fact":"The designer is responsible for protecting the distribution system from short-circuit effects by specifying adequate ratings and/or fault-limiting protection.","modality":"responsibility_statement","strength":"mandatory"},"localization_ja":{"language":"ja","title_ja":"短絡解析","title_status":"controlled_editorial","fact_ja":null,"fact_translation_status":"pending","modality_rendering_ja":"～が責任を負う／～が実施する","strength_label_ja":"必須","translation_priority":"high","translation_notes":[],"title_translation_provenance":"editorial_controlled","fact_translation_provenance":"not_translated","publication_eligible":false},"references":[],"meaning":{"engineering_basis":"Fault-current magnitude and duration must remain within equipment protection capability.","engineering_basis_source":"source_explicit","engineering_interpretation":null,"interpretation_confidence":null},"risk":{"failure_modes":["short_circuit_damage","interrupting_rating_exceeded"],"failure_mode_source":"source_explicit","failure_domains":["electrical"]},"quality":{"source_status":"normal","data_quality_flag":"normal"},"applicability":{"applicability_class":"general","evaluation_mode":"default_applicable","evaluation_scope":"project","input_semantics":"none","source_condition_text":null,"trigger":null,"approval_gate":null,"exception_condition":null,"condition_provenance":"none","normalization_provenance":"none"},"lifecycle":{"primary_phase":"design","primary_phase_label":"Design","applicable_phases":["design"],"phase_links":[{"phase":"design","provenance":"source_explicit","basis":"Source explicitly assigns a designer/design-document action.","phase_label":"Design"}]},"responsibility":{"primary_workflow_owner":"ACT-DESIGNER-AE","primary_workflow_owner_name":"Designer / A-E","actor_assignment_status":"source_actor_present","actors":[{"actor_id":"ACT-DESIGNER-AE","actor_name":"Designer / A-E","actor_class":"project_delivery","source_named":true,"relation_type":"action_owner","provenance":"source_explicit","lifecycle_phase":"design","lifecycle_phase_label":"Design","basis":"Source explicitly names the designer/electrical designer."}]},"verification":{"method":"short_circuit_analysis","stage":["design"],"acceptance_criteria":null,"evidence_required":["short_circuit_study"],"verification_provenance":"source_implied","evidence_provenance":"source_implied","audit_status":"source_implied_verification","audit_confidence":"high","acceptance_provenance":"not_stated_in_jddg","evidence_type_ids":["EV-DESIGN-ANALYSIS-FINAL","EV-SHORT-CIRCUIT-ANALYSIS","EV-INTERMEDIATE-ONE-LINE","EV-FINAL-CALCULATIONS","EV-CONTRACTOR-SC-COORDINATION"],"supporting_source_requirements":["JDDG25-14.8.4.3-R01","JDDG25-14.8.3.3-R02","JDDG25-14.8.3.1-R06","JDDG25-14.8.4.3-R02","JDDG25-14.8.3.2-R05"],"source_support_scope":"design_submittal_or_analysis"},"resolved_evidence":[{"evidence_type_id":"EV-DESIGN-ANALYSIS-FINAL","name":"Final Design Analysis compliance verification","source_requirement_ids":["JDDG25-14.8.4.3-R01"],"stage":["final_design"],"source_scope":"Final Design Analysis should support and verify design compliance with project requirements."},{"evidence_type_id":"EV-SHORT-CIRCUIT-ANALYSIS","name":"Short-circuit analysis","source_requirement_ids":["JDDG25-14.8.3.3-R02"],"stage":["intermediate_design"],"source_scope":"Intermediate calculations include short-circuit analysis."},{"evidence_type_id":"EV-INTERMEDIATE-ONE-LINE","name":"Intermediate one-line / riser diagram","source_requirement_ids":["JDDG25-14.8.3.1-R06"],"stage":["intermediate_design"],"source_scope":"One-line/riser diagrams show conduit/conductor sizes, panels, breaker frame/trip values, and short-circuit ratings."},{"evidence_type_id":"EV-FINAL-CALCULATIONS","name":"Final engineering calculations","source_requirement_ids":["JDDG25-14.8.4.3-R02"],"stage":["final_design"],"source_scope":"All final calculations are included in the Final Design Analysis."},{"evidence_type_id":"EV-CONTRACTOR-SC-COORDINATION","name":"Contractor short-circuit study and time-coordination curves","source_requirement_ids":["JDDG25-14.8.3.2-R05"],"stage":["contractor_submittal"],"source_scope":"For the stated demand/critical-process condition, specifications should require contractor short-circuit study and time-coordination curves."}],"supporting_source_requirements":[{"requirement_id":"JDDG25-14.8.4.3-R01","section":"14.8.4.3","title":"DESIGN ANALYSIS","fact":"Final design analysis should support and verify that the design complies with project requirements."},{"requirement_id":"JDDG25-14.8.3.3-R02","section":"14.8.3.3","title":"DESIGN ANALYSIS","fact":"Intermediate design calculations should include short-circuit analysis."},{"requirement_id":"JDDG25-14.8.3.1-R06","section":"14.8.3.1","title":"DRAWINGS","fact":"Intermediate one-line/riser diagrams are to show conduit and conductor sizes, panels, breaker frame sizes, trip amps, and short-circuit ratings."},{"requirement_id":"JDDG25-14.8.4.3-R02","section":"14.8.4.3","title":"DESIGN ANALYSIS","fact":"All final calculations are to be included in the Final Design Analysis."},{"requirement_id":"JDDG25-14.8.3.2-R05","section":"14.8.3.2","title":"SPECIFICATIONS","fact":"For designs with demand of at least 500 kVA or processes where loss of function is undesirable, specifications should require the construction contractor to provide a short-circuit study and time-coordination curves."}],"references_resolved":[]}