Pad Mounted Transformer Sizing Calculator

Enter the demand load your electrical engineer has calculated, and this returns the next standard kVA step, the loading point you will actually run at, and whether that point sits where the federal efficiency figure was measured.

Inputs

Configuration

Single-phase Three-phase

Standard steps differ. Single-phase runs 25 to 167 kVA; three-phase runs 45 to 2500 kVA, with larger ratings as a project build.

Peak demand load (kW)

Demand, not connected load. If you only have connected load, multiply it by the demand factor your code or utility standard gives for the occupancy first — this tool will not guess that factor for you.

Power factor

Used to convert kW to kVA. Ask the facility if you do not have a measured figure.

Growth allowance (%)

Check this against the real load curve rather than a rule of thumb. Every point of headroom is paid for in no-load loss every hour of every year the unit is energized.

Standard kVA steps are the ANSI and IEEE ratings Talite builds to. Nothing here is a substitute for the serving utility’s sign-off on the rating before release.

Result

Enter a demand load and press calculate. The result shows the required kVA, the standard step above it, and the loading percentage you would run at.

Demand load

Loading on today’s demand

Loading with growth taken up

Largest standard step