File talk:Leakage mesure.gif

Dubious diagram

This diagram appears to be in error as a transformer's short-circuit inductance is not equal to the leakage inductance.

A transformer's short-circuit inductance is defined by the following relationship:

$\sigma =1-{\frac {M^{2}}{L_{P}L_{S}}}=1-k^{2}={\frac {L_{sc}}{L_{oc}}}={\frac {L_{sc}^{sec}}{L_{P}}}={\frac {i_{oc}}{i_{sc}}}$,

where,

• σ is the leakage factor or Heyland factor
• i_oc & i_sc are no-load & short circuit currents
• k is coupling coefficient
• M is mutual inductance
• L_P & L_S are primary & secondary self-inductances
• L_oc & L_sc are no-load & short circuit inductances.