Data-Center Transformer Selector

IEEE C57.110 harmonic (K-factor) derating · N / N+1 / 2N redundancy · AN/AF cooling — for colocation, hyperscale and edge data centers. Planning estimate for the US / North American market.

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1 · Critical Load & Harmonics

K-13 is typical downstream of a 6-pulse UPS; K-20 for heavy non-linear (VFD-rich) loads.

2 · Redundancy & Cooling

K-factor derating (C57.110, approximate per-unit capability of a standard transformer):
K-1 → 100% · K-4 → 96% · K-13 → 88% · K-20 → 84%. A K-rated transformer of matching K-factor carries its nameplate with no derating.

Report

Enter the critical load and harmonic profile, choose redundancy & cooling, then click Calculate. A planning estimate — confirm with a PE and the equipment nameplate.

Specify the K-rated dry-type units for your data center — send the report to TransNine's engineering team for a quote.

Data-center & K-rated transformers

Data-center solutions Cast-resin dry-type Dry-type transformers Hyperscale K-factor project Request a quote