Find the family.
Then the exact fit.

10–1,300 MVA typical marketed range; 10–1,100 kV depending design; single-phase bank or three-phase unit

50–1,300 MVA/unit typical; generator side about 6.3–36 kV; grid side 66–765 kV+

20–1,500+ MVA; 66–800 kV; optional 6.6–33 kV tertiary winding

25 kVA distribution units through 1,300 MVA power units; roughly 0.4–765 kV+

1 kVA–63 MVA marketed/application range; low voltage through 145 kV specialty units; common industrial range 15 kVA–25 MVA, ≤36 kV

50 kVA–40 MVA; typically up to 36/40.5 kV, with higher-voltage specialist designs

2.5–250 MVA common mobile range; 13.8–230 kV common; larger and 400 kV packages engineered

5–100 MVA common rapid-replacement band; 250 MVA+ engineered reserve units

100–1,500 MVA; 110–765 kV; phase-angle range often up to about ±30° but project-specific

1–250 MVA; primary typically 6–66 kV; secondary often about 100–1,500 V at very high current

0.5–200 MVA; 3.3–66 kV input; 6/12/24/48-pulse arrangements

1–1,000+ MVA depending SVC/HVDC/industrial duty; AC grid voltage through EHV/UHV; valve-side custom

1–100 MVA; 15/25/50 kV AC railway systems or rectifier supply for 750/1,500/3,000 Vdc traction

0.5–10 MVA inverter/wind unit transformers; 10–150+ MVA collector/substation transformers; 0.4/0.69/0.8 kV to 11–36 kV common

300 kVA–100 MVA; secondary commonly 400/415/480 V or MV distribution; primary commonly 11–35 kV

100 kVA–20 MVA; 0.4–33 kV; skid, flameproof, mobile and high-harmonic variants

50 kVA–15 MVA; LV and 6.6/11 kV common; dry, liquid-filled and water-cooled variants

50 kVA–200 MVA; LV through 145 kV depending plant/process duty

5–500 kVA single-phase; roughly 15–1,000 kVA three-phase; primary commonly 2.4–34.5 kV

75 kVA–10 MVA; primary commonly 2.4–35 kV; radial or loop-feed

100 kVA–10 MVA standard distribution band; up to about 36 kV primary

300–2,500 kVA common; network secondary often 208Y/120 V or 480Y/277 V; larger custom

50 VA–5 MVA standard/special range; 120 V through 15 kV; 1:1 or step ratio

About 100 kVA–20 MVA equivalent thermal rating; 3.3–230 kV system class; neutral current often 100–3,000 A