As of my last knowledge update in September 2021, the term "transformer short-circuit withstand capability" doesn't appear to be a standard or widely recognized concept within the field of transformers or electrical engineering. Transformers are devices that transfer electrical energy between two or more circuits through electromagnetic induction. Short-circuit withstand capability typically refers to a device's ability to handle and safely withstand high levels of fault currents during a short circuit.
It's possible that this term has emerged or gained significance after my last update, or it might be specific to a particular context or industry. If you have more context or specific information about where you encountered this term, I would be happy to help you to the best of my ability.