Relationship, requires input

Power transformer requires input Grain-oriented electrical steel

The stored status is what a reviewer approved. The level below it is what the overlapping data support; the two are shown side by side and only a human moves the status.

Stored statusEstablished relationEvidence level (latest analysis)not analysed yet

Mechanism, evidence, reviewer judgements

The edge as stored

Power transformer requires input Grain-oriented electrical steel2 evidenceEstablished relation

Power transformer depends on Grain-oriented electrical steel.

Mechanism

Transformer cores are stacked laminations of grain-oriented electrical steel chosen for low core loss. Amorphous alloy cores are a partial alternative in distribution units; there is no drop-in core material for large power transformers.

Evidence

documentUSGS, Iron and steel statistics and informationusgs.govchecked 2026-09-07
documentIEA, Electricity Grids and Secure Energy Transitions (2023)iea.orgGrid expansion, connection queues and transformer and cable supply chains.checked 2026-09-07

Status: established_identity_or_engineering_relation
Reviewer confidence: 0.95
Stated strength: 0.90
Lag: not stated
Version: curated_seed_v1
Reviewed: 2026-09-07

Confidence and strength are curated judgements recorded with the edge, not measured quantities.

Entity pages: Power transformer, Grain-oriented electrical steel.

Not computed

Statistical evidence

No analysis has been stored for this edge. The causal.analyze_all job runs monthly over every edge with a catalog metric linked to both entities; edges without a series on both ends are not analysed.

Not computed

Causal estimate

A causal estimate needs at least 20 overlapping periods and was not attempted for this edge yet.

What each rung means

Levels

Level 0: No association found
the overlapping data show no significant association.
Level 1: Correlation only
statistically associated in the overlapping periods; no direction, no mechanism.
Level 2: Predictive lead/lag
one series historically contains predictive information about the other.
Level 3: Mechanism supported
a documented physical, economic or institutional mechanism with cited evidence.
Level 4: Causally supported
a backdoor-adjusted estimate that survived refutation, on stated assumptions.
Level 5: Established relation
follows from engineering, accounting or scientific structure.

Every stored run, newest first

Analysis history

No runs stored.