Single Line Diagram (SLD)

{
  "title_block": "<common>",
  "drawing_title": "str",
  "system_type": "str",
  "nominal_voltage": "str",
  "frequency_hz": "num",
  "bus_sections": [
    {"bus_id": "str", "voltage_v": "num",
     "short_circuit_rating_ka": "num", "bus_coupler": "bool"}
  ],
  "sources": [
    {"source_id": "str", "type": "str",
     "rating": "str", "feeding_bus": "str"}
  ],
  "transformers": [
    {"tag": "str", "rating_kva": "num", "primary_v": "str",
     "secondary_v": "str", "vector_group": "str", "impedance_pct": "num",
     "from_bus": "str", "to_bus": "str"}
  ],
  "rectifiers_chargers": [
    {"tag": "str", "input_ac_v": "str", "output_dc_v": "num",
     "rating_a": "num", "from_bus": "str", "to_bus": "str"}
  ],
  "batteries": [
    {"tag": "str", "type": "str", "voltage_v": "num",
     "ah_capacity": "num", "autonomy_min": "num", "cells": "int"}
  ],
  "inverters": [
    {"tag": "str", "input_dc_v": "num", "output_ac_v": "str",
     "rating_kva": "num", "from_bus": "str", "to_bus": "str"}
  ],
  "static_switches": [
    {"tag": "str", "rating_a": "num", "transfer_time_ms": "num"}
  ],
  "feeders_loads": [
    {"feeder_id": "str", "from_bus": "str",
     "load_tag": "str", "load_description": "str",
     "rated_power_kw_kva": "num", "breaker_rating_a": "num",
     "breaker_type": "str", "cable_ref": "str", "protection_relay": "str"}
  ],
  "protection_metering": [
    {"tag": "str", "function_code": "str",
     "location": "str", "description": "str"}
  ],
  "earthing_system": "str",
  "reference_drawings": [
    {"drawing_number": "str", "description": "str"}
  ],
  "general_notes": ["str"],
  "revision_history": [
    {"revision": "str", "date": "str", "description": "str",
     "drawn_by": "str", "checked_by": "str",
     "engineered_by": "str", "approved_by": "str"}
  ]
}