Engineering cognition

An answer in the fixed shape of the cognitive response contract: fourteen named sections, evidence instead of hidden reasoning, and an abstention token wherever a section has nothing to say.

Master prompt sections 24 and 92

Every section below is composed by a deterministic function reading the System of Engineering Record. No language model is called and none is needed, because each heading of the contract is a question about records that already exist. What a model would add is fluent prose over the same facts, and the contract exists precisely to stop fluency standing in for evidence.

Question

Structured rather than free text. The sandbox has no model to interpret a sentence, and offering a text box that silently keyword-matched would be a worse lie than the constraint.

Attribute

What is the canonical value of Rated operational voltage (Ue), and what proves it?

Composed from the record by a deterministic function. No language model was called.

confidence low

TASK

Establish the controlled value of Rated operational voltage (Ue) for this project and cite the evidence chain behind it.

CANONICAL FACTS

Rated operational voltage (Ue) = 400 V (FCT-2026-0045-0001, L4).
Selected by system on 2026-05-12. Single claim, exact agreement after normalisation, criticality above MEDIUM required a named selection.
No competing claim existed at the time of selection.

RELEVANT ENGINEERING OBJECTS

MSB-01-Q1 Incoming air circuit breaker carries RatedVoltage = 400 (L3).
MSB-01-BB1 Main horizontal busbar carries RatedVoltage = 400 (L3).

APPLICABLE REQUIREMENTS

SPC 3.2 a (REQ-2026-0045-0002, CRITICAL, L4): The main busbar system shall be rated 400 V, three phase, four wire, 50 Hz.

APPLICABLE RULES

CR-PROTOCOL: Communication protocol is MODBUS_TCP, so T-COMM-ENG, T-COMM-FAT are required. Any plant communication interface pulls in register mapping, addressing and a protocol acceptance test.
CR-CABLE-ENTRY: Cable entry direction is BOTTOM, so T-GLAND, T-FAB-CHECK are required. Bottom entry requires gland plate detailing and coordination with the floor cut-out and plinth.
CR-ARC: Internal arc classification is IAC_A_FLR, so T-ARC-VERIFY is required. A declared internal arc classification is only valid with a type test evidence dossier behind it.
IEC 61439-1 clause 5.2.1 governs Rated operational voltage (Ue). Line-to-line operational voltage of the main busbar system. Drives clearance, creepage and device selection.

SOURCE EVIDENCE

GSPE-P26045-01-E-SPC-001 @ 502: "rated 400 V, three phase, four wire, 50 Hz" gives 400 (L3, 98% extractor confidence).

CALCULATIONS

No validated calculation engine exists in the sandbox. Section 45 requires one for sizing, withstand and coordination, so any quantitative conclusion here rests on recorded values, not on a computed result.

CHECKER FINDINGS

MANUAL CHECK REQUIRED

CONCLUSION / RECOMMENDATION

Rated operational voltage (Ue) is 400 V for this project, on the authority of system's selection over 0 competing claims.

CONFIDENCE

LOW. The weakest record used is at L3, below the canonical level, so this answer rests on data an engineer has not finished promoting.

UNCERTAINTIES

UNKNOWN

HUMAN APPROVAL REQUIRED

None to state the value. Changing it is a C3 action reserved to an Engineer Lead, and if it is baselined, a controlled change with impact analysis.

POTENTIAL IMPACT

Changing this value touches 15 records, of which 13 would need rework rather than a re-read.
No gate depends on this value yet.

NEXT ACTION

None. The value is established and cited. Re-run the requirement-to-configuration checker if the configuration has since changed.

Why this shape

Master prompt section 92, output discipline.

An empty section emits one of the six abstention tokens rather than a blank or a reassuring sentence. CALCULATIONS says the same thing in every answer: there is no validated calculation engine in the sandbox, so no conclusion here is a computed result. A section that quietly read "none required" is how a missing calculation becomes invisible.

CONFIDENCE is derived from the trust states of the records actually used and from whether a deterministic checker has passed on the scope. It is a claim about the evidence, which means it can be argued with; a number a model produced about its own certainty cannot.