{
  "starting": {
    "resultSchema": "infrastructure-screen-1",
    "contentVersion": "2.0.0",
    "modelVersion": "1.0.0",
    "lessonId": "protection-trip-chain",
    "model": "inverseTime",
    "inputs": {
      "multiple": 10,
      "tms": 0.1
    },
    "outputs": {
      "tripS": 0.297059862418842,
      "status": "model-evaluated"
    },
    "inputUnits": {
      "multiple": "multiple of pickup",
      "tms": "time multiplier setting"
    },
    "outputUnits": {
      "tripS": "s or null outside trip domain",
      "status": "curve state"
    },
    "assumptions": [
      "The supplied IEC-style inverse-time equation is a curve illustration, not a relay setting.",
      "Separate thermal and measurement screens: The adiabatic conductor screen is area ≥ fault current × sqrt(clearing time) / k. At 20 kA, 0.2 s and illustrative k = 143, the area is approximately 62.55 mm² before other selection checks. A resistive CT burden model gives VA = secondary current² × loop resistance: at 2 Ω, 1 A gives 2 VA while 5 A gives 50 VA. Neither scalar screen establishes complete cable suitability or freedom from CT saturation."
    ],
    "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 relay settings for real equipment, live-work guidance or incident-energy calculator.",
      "Teaching curves must not be represented as a verified manufacturer implementation."
    ],
    "sourceLocators": [
      {
        "id": "DCIE-R1",
        "chapter": 6,
        "pdfPages": [
          30,
          33
        ],
        "evidenceStatus": "manuscript-derived; not independent source verification"
      }
    ],
    "inputHash": "bf8ad6dcbca7a5392520639bb568e9c900bdf498e79a632aad88c0a911f086fe",
    "sourceRevision": "e4d47bd6616aa54e19c7da5ee4e2a98afe6209c1",
    "independentEngineeringVerification": false,
    "resultHash": "86038bc89c18655430c3114e22c0e5e1d1ecf18081b16b98b68052e12da312cf"
  },
  "challenge": {
    "resultSchema": "infrastructure-screen-1",
    "contentVersion": "2.0.0",
    "modelVersion": "1.0.0",
    "lessonId": "protection-trip-chain",
    "model": "inverseTime",
    "inputs": {
      "multiple": 2,
      "tms": 0.1
    },
    "outputs": {
      "tripS": 1.002902702004684,
      "status": "model-evaluated"
    },
    "inputUnits": {
      "multiple": "multiple of pickup",
      "tms": "time multiplier setting"
    },
    "outputUnits": {
      "tripS": "s or null outside trip domain",
      "status": "curve state"
    },
    "assumptions": [
      "The supplied IEC-style inverse-time equation is a curve illustration, not a relay setting.",
      "Separate thermal and measurement screens: The adiabatic conductor screen is area ≥ fault current × sqrt(clearing time) / k. At 20 kA, 0.2 s and illustrative k = 143, the area is approximately 62.55 mm² before other selection checks. A resistive CT burden model gives VA = secondary current² × loop resistance: at 2 Ω, 1 A gives 2 VA while 5 A gives 50 VA. Neither scalar screen establishes complete cable suitability or freedom from CT saturation."
    ],
    "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 relay settings for real equipment, live-work guidance or incident-energy calculator.",
      "Teaching curves must not be represented as a verified manufacturer implementation."
    ],
    "sourceLocators": [
      {
        "id": "DCIE-R1",
        "chapter": 6,
        "pdfPages": [
          30,
          33
        ],
        "evidenceStatus": "manuscript-derived; not independent source verification"
      }
    ],
    "inputHash": "d2c1dabe9d11d23ed03ddd2f6390f57ece04aa9f8941b48c9fb44fc525c6c840",
    "sourceRevision": "e4d47bd6616aa54e19c7da5ee4e2a98afe6209c1",
    "independentEngineeringVerification": false,
    "resultHash": "d534980c2da1d529dc791a4859763a6c5c57da0667ef7268e38127e485313947"
  },
  "fuel": null,
  "engineeringDecision": "HOLD"
}