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Electrical Calculators – Transformer Sizing
x402
Electrical Calculators – Transformer Sizing is a paid API for AI agents from electrical-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-11-02).
Calculates transformer kVA requirement with margin, selects the next standard size, and computes primary and secondary full-load currents.
Price / call$0.02
Success—
StatusUnknown
How this service works
Transformer kVA for a load with a stated margin, next common standard size, and primary and secondary full-load current.
Output
Returns the load kVA, required kVA after applying the margin, the selected next standard transformer kVA size, a list of common standard sizes, primary and secondary full-load currents in amps, secondary current at actual load, turns ratio, spare capacity percentage at the selected size, phase, and a plain-language summary.
Example use cases
New industrial facility transformer selection
“I'm installing a 120 kW three-phase load at 0.9 power factor on a 415 V secondary fed from a 11000 V primary. Size the transformer with a 20% margin and tell me the standard kVA to order plus primary and secondary full-load currents.”
Single-phase residential service sizing
“I need to size a single-phase transformer for a 15 kW residential load at unity power factor, 240 V secondary, with a 30% spare margin. What standard kVA transformer should I buy?”
Generator step-up transformer check
“We have a 200 kW three-phase generator at 0.8 power factor stepping up from 400 V to 33000 V. With a 25% safety margin, what kVA transformer do we need and what are the full-load currents on each side?”
Technical details
Endpoint
GEThttps://electrical-calc.x402tookit.com/transformer-sizing?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a complete transformer sizing calculation in one call — covering required kVA with margin, standard size selection, and full-load current calculations for both windings. It is more complete than a standalone kVA calculator because it also returns standard size recommendations and winding currents. Use it when planning transformer procurement for new installations, load upgrades, or verifying existing transformer adequacy.
Side effects
- Missing required parameters (loadKw or secondaryVoltageV) returns a validation error
- Power factor of 0 or outside 0–1 range causes rejection
- Negative or zero voltage values are invalid
- marginPct outside 0–200 range is rejected
- Endpoint returns degraded flag if results are partial or uncertain
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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