{
  "starting": {
    "resultSchema": "infrastructure-screen-1",
    "contentVersion": "2.0.0",
    "modelVersion": "1.0.0",
    "lessonId": "grounding-power-quality",
    "model": "auxiliaryScreen",
    "inputs": {
      "harmonicA": 30,
      "fundamentalA": 100,
      "referenceA": 300,
      "groundA": 2000,
      "groundOhm": 0.5,
      "dcA": 10,
      "oneWayM": 100,
      "ohmPerM": 0.003
    },
    "outputs": {
      "thdPercent": 30,
      "tddPercent": 10,
      "groundPotentialRiseV": 1000,
      "dcDropV": 6
    },
    "inputUnits": {
      "harmonicA": "A RMS",
      "fundamentalA": "A RMS",
      "referenceA": "A RMS",
      "groundA": "A",
      "groundOhm": "Ω",
      "dcA": "A DC",
      "oneWayM": "m",
      "ohmPerM": "Ω/m"
    },
    "outputUnits": {
      "thdPercent": "%",
      "tddPercent": "%",
      "groundPotentialRiseV": "V",
      "dcDropV": "V DC"
    },
    "assumptions": [
      "Harmonic ratios, ground rise and DC cable drop use the supplied scalar boundaries.",
      "Grounding has several functions: Protective bonding, source-neutral grounding, lightning protection and signal/EMC interfaces are related but not interchangeable. In the deliberately simplified resistive model, 2 kA entering a 0.5 Ω grounding system gives 1,000 V ground-potential rise. It does not automatically give the voltage across a person. Soil structure, geometry, current distribution, bonding, surface layer, duration and the applicable criterion remain necessary for a safety assessment."
    ],
    "limitations": [
      "Educational screen only; no equipment selection, facility calibration, professional review or certification.",
      "No dynamics, protection coordination, site conditions or manufacturer-specific behavior are inferred.",
      "No touch/step-voltage certification or jurisdictional harmonic limits.",
      "Frequency adaptation and DC operating voltages remain equipment-specific."
    ],
    "sourceLocators": [
      {
        "id": "DCIE-R1",
        "chapter": 7,
        "pdfPages": [
          34,
          37
        ],
        "evidenceStatus": "manuscript-derived; not independent source verification"
      }
    ],
    "inputHash": "62e6e48202e4dd55cce51fe339e96288a43b192079d6ec7ad62ecfa2e7facb60",
    "sourceRevision": "e4d47bd6616aa54e19c7da5ee4e2a98afe6209c1",
    "independentEngineeringVerification": false,
    "resultHash": "d02631432721cae316d99c1f0b2f3fc454a1918cb3119b1494daa2d80011a0cd"
  },
  "challenge": {
    "resultSchema": "infrastructure-screen-1",
    "contentVersion": "2.0.0",
    "modelVersion": "1.0.0",
    "lessonId": "grounding-power-quality",
    "model": "auxiliaryScreen",
    "inputs": {
      "harmonicA": 30,
      "fundamentalA": 50,
      "referenceA": 300,
      "groundA": 2000,
      "groundOhm": 0.5,
      "dcA": 10,
      "oneWayM": 100,
      "ohmPerM": 0.003
    },
    "outputs": {
      "thdPercent": 60,
      "tddPercent": 10,
      "groundPotentialRiseV": 1000,
      "dcDropV": 6
    },
    "inputUnits": {
      "harmonicA": "A RMS",
      "fundamentalA": "A RMS",
      "referenceA": "A RMS",
      "groundA": "A",
      "groundOhm": "Ω",
      "dcA": "A DC",
      "oneWayM": "m",
      "ohmPerM": "Ω/m"
    },
    "outputUnits": {
      "thdPercent": "%",
      "tddPercent": "%",
      "groundPotentialRiseV": "V",
      "dcDropV": "V DC"
    },
    "assumptions": [
      "Harmonic ratios, ground rise and DC cable drop use the supplied scalar boundaries.",
      "Grounding has several functions: Protective bonding, source-neutral grounding, lightning protection and signal/EMC interfaces are related but not interchangeable. In the deliberately simplified resistive model, 2 kA entering a 0.5 Ω grounding system gives 1,000 V ground-potential rise. It does not automatically give the voltage across a person. Soil structure, geometry, current distribution, bonding, surface layer, duration and the applicable criterion remain necessary for a safety assessment."
    ],
    "limitations": [
      "Educational screen only; no equipment selection, facility calibration, professional review or certification.",
      "No dynamics, protection coordination, site conditions or manufacturer-specific behavior are inferred.",
      "No touch/step-voltage certification or jurisdictional harmonic limits.",
      "Frequency adaptation and DC operating voltages remain equipment-specific."
    ],
    "sourceLocators": [
      {
        "id": "DCIE-R1",
        "chapter": 7,
        "pdfPages": [
          34,
          37
        ],
        "evidenceStatus": "manuscript-derived; not independent source verification"
      }
    ],
    "inputHash": "264f0e56e7e698b831f8e027af9c5b4d0ae8e70479340413ba76673654236b90",
    "sourceRevision": "e4d47bd6616aa54e19c7da5ee4e2a98afe6209c1",
    "independentEngineeringVerification": false,
    "resultHash": "df6e79f7c630f5857dfcc78f7d74bfcec16a7e6ad96ec410462c8d5e5746c97e"
  },
  "fuel": null,
  "engineeringDecision": "HOLD"
}