Critical-Load Transformer RFQ Readiness Scorecard

Electrical basis

Define the operating duty before choosing a published product family.

Utility or upstream primary voltage and allowable tap range are confirmed. Secondary voltage, frequency, phases, and grounding arrangement are confirmed. Required kVA/MVA, average load, peak load, and growth allowance are documented. Available fault current or source impedance is available for coordination review.

Critical-load interfaces

Treat redundancy and power quality as whole-path design inputs.

The one-line diagram identifies N, N+1, or 2N paths and each transformer position. UPS/server nonlinear-load information or the expected harmonic spectrum is available. Upstream/downstream protection and the intended energization sequence are defined. Indoor/outdoor location, altitude, ambient range, enclosure, and ventilation constraints are documented.

Commercial and verification basis

Make supplier offers comparable before price becomes the deciding number.

Applicable standards, routine/type/special tests, and witness points are listed. Required drawings, calculations, reports, certificates, and language are specified. Required-on-site date and approval, test, shipment, and receiving milestones are defined. Accessories, spares, incoterm, destination, unloading, and site responsibilities are clear.

Critical-Load Transformer RFQ Readiness Scorecard

Electrical basis

Critical-load interfaces

Commercial and verification basis

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